MythEclipseandClaude Opus 4.8
74400376a0
Vision API call sekarang pakai retryWithBackoff (2 retries instant). Fallback message tegas: 'GAGAL DIANALISIS — JANGAN mengasumsikan aman'. Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
1389 lines
43 KiB
TypeScript
1389 lines
43 KiB
TypeScript
import OpenAI from "openai";
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import { AbortError } from "p-retry";
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import { z } from "zod";
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import { config } from "../../shared/config/config.js";
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import { createChildLogger } from "../../shared/logger/logger.js";
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import { retryWithBackoff } from "../../shared/utils/retry.js";
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import { resizeImageForVision } from "../attachment-upload/imageResizer.js";
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import { extractMessageMediaEvidence } from "../message-capture/messageMetadata.js";
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import type {
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AnalysisResult,
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AttachmentRecord,
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MessageRecord,
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} from "../message-capture/types.js";
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import { withLlmConcurrency } from "./concurrencyLimiter.js";
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import { formatModerationTextEvidenceForPrompt } from "./indonesianTextNormalizer.js";
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import { buildSystemPrompt as buildSystemPromptModular } from "./moderationPrompt.js";
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import {
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getStickerFromCache,
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initStickerCache,
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isStickerCacheReady,
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setStickerInCache,
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} from "./stickerCache.js";
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import {
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buildCustomEmojiVisionPrompt,
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buildGeneralImageVisionPrompt,
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buildStickerTextOnlyWarning,
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buildStickerVisionPrompt,
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} from "./stickerPrompt.js";
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import {
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getCachedMediaAnalysis,
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makeCustomEmojiCacheKey,
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makeImageCacheKey,
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makeStickerCacheKey,
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upsertCachedMediaAnalysis,
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} from "./textCacheStore.js";
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import { extractUrlsFromText, fetchUrlSafely } from "./urlFetcher.js";
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const SeveritySchema = z.enum(["none", "low", "medium", "high", "critical"]);
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const RecommendedActionSchema = z.enum([
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"none",
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"monitor",
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"warn",
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"review",
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"delete",
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"escalate",
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]);
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const ResultItemSchema = z.object({
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message_id: z.union([z.string(), z.number()]).transform(String),
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status: z.enum(["clean", "warn", "flagged"]),
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flags: z.array(z.string()).optional(),
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score: z.number(),
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analysis: z.string().nullable().optional(),
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categories: z.array(z.string()).optional(),
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severity: SeveritySchema.optional(),
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confidence: z.number().optional(),
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recommended_action: RecommendedActionSchema.optional(),
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policy_version: z.string().optional(),
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evidence: z.array(z.string()).optional(),
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});
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const ModerationResponseSchema = z.object({
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results: z.array(ResultItemSchema),
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});
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const log = createChildLogger("llmModerationClient");
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/**
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* Enhanced deferral detection pattern (R9).
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*
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* Only matches patterns where the model explicitly states it cannot make
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* a decision and needs human review. Removed overly broad patterns that
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* caused false positives:
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* - "admin (perlu|harus|sebaiknya)" → common in regular sentences
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* - "bisa (berpotensi|mengandung)" → decisive statements, not deferral
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* - "maaf|sorry" → opinions/apologies, not deferral
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* - "saya tidak yakin|tahu|paham" → expressing uncertainty, not deferral
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*/
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const DEFERRAL_ANALYSIS_PATTERN =
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/(?:kurang (?:konteks|bukti|informasi|data) (?:untuk (?:menilai|menentukan|memutuskan)|untuk moderasi)|perlu (?:dicek|diperiksa|ditinjau|dikaji|dievaluasi) (?:oleh )?(?:admin|moderator|manusia|human review)|tidak (?:bisa|dapat|mampu) (?:menentukan|menilai|memastikan|menyimpulkan|memberi keputusan|memoderasi).*(?:karena (?:konteks tidak jelas|informasi tidak cukup|bukti kurang|konteks kurang|tidak cukup konteks)|data tidak cukup|informasi tidak lengkap)|cannot determine|insufficient (?:context|evidence|information) (?:to |for )?(?:moderate|judge|evaluate|decide|classify)|(?:sepertinya|tampaknya) (?:perlu|harus) (?:ditinjau|diperiksa|dicek) (?:oleh )?(?:admin|moderator)|tidak cukup (?:bukti|informasi|konteks) (?:untuk (?:memberikan|membuat|menentukan)|memutuskan))/i;
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/**
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* Exceptions: patterns that look like deferral but are actually decisive.
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* Expanded to catch more variations where the model gives a clear verdict.
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*/
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const DEFERRAL_EXCEPTION_PATTERN =
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/tidak bisa menentukan.*(?:karena|sebab|dengan alasan|sebab tidak ada).*(?:clean|tidak (?:ada|terdapat|menunjukkan).*(?:pelanggaran|masalah|indikasi|konten)|aman|bersih|normal)/i;
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function hasDeferralAnalysis(analysis: string): boolean {
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if (DEFERRAL_EXCEPTION_PATTERN.test(analysis)) return false;
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return DEFERRAL_ANALYSIS_PATTERN.test(analysis);
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}
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function clampScore(value: number | undefined, fallback = 0): number {
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return Math.max(
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0,
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Math.min(1, Number.isFinite(value) ? (value as number) : fallback),
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);
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}
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function deriveSeverity(
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status: "clean" | "warn" | "flagged",
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score: number,
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): z.infer<typeof SeveritySchema> {
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if (status === "clean") return "none";
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if (status === "warn") return score >= 0.65 ? "medium" : "low";
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if (score >= 0.9) return "critical";
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return score >= 0.75 ? "high" : "medium";
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}
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function deriveRecommendedAction(
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status: "clean" | "warn" | "flagged",
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severity: z.infer<typeof SeveritySchema>,
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): z.infer<typeof RecommendedActionSchema> {
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if (status === "clean") return "none";
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if (status === "warn") return severity === "medium" ? "review" : "warn";
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if (severity === "critical") return "escalate";
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if (severity === "high") return "delete";
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return "review";
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}
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/**
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* JSON Schema for OpenAI's response_format: { type: "json_schema" }.
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* This enforces the exact structure the LLM must output (R2).
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*/
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const MODERATION_JSON_SCHEMA = {
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type: "object",
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properties: {
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results: {
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type: "array",
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items: {
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type: "object",
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properties: {
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message_id: { type: "string" },
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status: { type: "string", enum: ["clean", "warn", "flagged"] },
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flags: { type: "array", items: { type: "string" } },
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score: { type: "number", minimum: 0, maximum: 1 },
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analysis: { type: "string" },
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categories: { type: "array", items: { type: "string" } },
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severity: {
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type: "string",
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enum: ["none", "low", "medium", "high", "critical"],
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},
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confidence: { type: "number", minimum: 0, maximum: 1 },
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recommended_action: {
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type: "string",
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enum: ["none", "monitor", "warn", "review", "delete", "escalate"],
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},
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policy_version: { type: "string" },
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evidence: { type: "array", items: { type: "string" } },
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},
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required: [
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"message_id",
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"status",
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"flags",
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"score",
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"severity",
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"confidence",
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"recommended_action",
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"policy_version",
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"evidence",
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"analysis",
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],
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additionalProperties: false,
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},
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},
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},
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required: ["results"],
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additionalProperties: false,
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};
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// ---------------------------------------------------------------------------
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// OpenAI client with Cloudflare WAF bypass (unchanged)
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// ---------------------------------------------------------------------------
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const openai = new OpenAI({
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apiKey: config.AI_LLM_API_KEY,
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baseURL: config.AI_LLM_BASE_URL,
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maxRetries: 0,
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timeout: 30000,
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fetch: async (url, init) => {
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const controller = new AbortController();
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const timeout = setTimeout(() => controller.abort(), 30000);
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const headers = new Headers(init?.headers);
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headers.set(
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"User-Agent",
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"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36",
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);
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for (const key of Array.from(headers.keys())) {
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if (key.toLowerCase().startsWith("x-stainless")) {
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headers.delete(key);
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}
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}
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const fetchInit = { ...init, headers, signal: controller.signal };
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try {
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const response = await globalThis.fetch(url, fetchInit);
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const body =
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typeof response.text === "function"
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? await response.text()
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: JSON.stringify(await response.json());
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let normalizedBody = body;
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if (response.ok !== false) {
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try {
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JSON.parse(body);
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} catch (error) {
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log.warn(
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{
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error: error instanceof Error ? error.message : String(error),
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status: response.status ?? 200,
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bodyLength: body.length,
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body,
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},
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"LLM provider returned malformed JSON response body",
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);
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normalizedBody = JSON.stringify(extractJson(body));
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}
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}
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const responseHeaders = new Headers(response.headers ?? undefined);
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responseHeaders.set("Content-Type", "application/json");
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responseHeaders.delete("Content-Length");
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return new Response(normalizedBody, {
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status: response.status ?? 200,
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headers: responseHeaders,
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});
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} finally {
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clearTimeout(timeout);
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}
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},
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});
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/**
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* Helper to extract JSON from a potentially conversational or markdown-wrapped string.
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*/
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export function extractJson(content: string): any {
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const codeBlockRegex = /```(?:json)?\s*([\s\S]*?)\s*```/g;
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const matches = content.matchAll(codeBlockRegex);
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for (const match of matches) {
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const codeContent = match[1].trim();
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try {
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const parsed = JSON.parse(codeContent);
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if (parsed && typeof parsed === "object") {
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return parsed;
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}
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} catch (_) {}
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}
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for (let start = 0; start < content.length; start++) {
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const firstChar = content[start];
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if (firstChar !== "{" && firstChar !== "[") continue;
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const stack = [firstChar];
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let inString = false;
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let escaped = false;
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for (let i = start + 1; i < content.length; i++) {
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const char = content[i];
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if (inString) {
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if (escaped) {
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escaped = false;
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} else if (char === "\\") {
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escaped = true;
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} else if (char === '"') {
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inString = false;
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}
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continue;
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}
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if (char === '"') {
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inString = true;
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continue;
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}
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if (char === "{" || char === "[") {
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stack.push(char);
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continue;
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}
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const last = stack[stack.length - 1];
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if ((char === "}" && last === "{") || (char === "]" && last === "[")) {
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stack.pop();
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if (stack.length === 0) {
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const candidate = content.slice(start, i + 1);
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try {
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const parsed = JSON.parse(candidate);
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if (parsed && typeof parsed === "object") {
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return parsed;
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}
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} catch (_) {}
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break;
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}
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}
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}
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}
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throw new Error("No JSON object found in response");
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}
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/**
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* Sanitize error messages for client-facing output (R10).
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* Internal details are logged but the caller gets a generic message.
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*/
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function sanitizeErrorMessage(internalMsg: string, messageId: string): string {
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// Log the full error for debugging
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log.warn(
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{ messageId, internalError: internalMsg },
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"Internal moderation error (sanitized for client)",
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);
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// Return generic message without internal details
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return `Analisis gagal dan memerlukan pemeriksaan manual. Error code: MOD_${Date.now().toString(36).slice(0, 6)}`;
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}
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export function parseModerationResponse(
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content: string,
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targetIds: string[],
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): AnalysisResult[] {
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let parsed: any;
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try {
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parsed = JSON.parse(content);
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} catch (e) {
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parsed = extractJson(content);
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}
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if (Array.isArray(parsed)) {
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parsed = { results: parsed };
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} else if (parsed && typeof parsed === "object" && !("results" in parsed)) {
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if ("message_id" in parsed) {
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parsed = { results: [parsed] };
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} else {
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const arrayKey = Object.keys(parsed).find((key) => {
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const val = (parsed as any)[key];
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return (
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Array.isArray(val) &&
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val.length > 0 &&
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val.every(
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(item: unknown) =>
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typeof item === "object" &&
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item !== null &&
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"message_id" in (item as any),
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)
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);
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});
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if (arrayKey) {
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parsed.results = (parsed as any)[arrayKey];
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} else {
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parsed = { results: [parsed] };
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}
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}
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}
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const parseResult = ModerationResponseSchema.safeParse(parsed);
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if (!parseResult.success) {
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throw new Error(`Zod validation failed: ${parseResult.error.message}`);
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}
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const response = parseResult.data;
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const foundIds = new Set<string>();
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const targetIdSet = new Set(targetIds);
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const results: (AnalysisResult | null)[] = response.results.map((result) => {
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const {
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message_id,
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status,
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flags,
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score,
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analysis,
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categories,
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severity,
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confidence,
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recommended_action,
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policy_version,
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evidence,
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} = result;
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const finalId = message_id.trim();
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if (!targetIdSet.has(finalId)) {
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return null;
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}
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if (foundIds.has(finalId)) {
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throw new Error(
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`Duplicate message_id in moderation response: ${finalId}`,
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);
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}
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foundIds.add(finalId);
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const coalescedAnalysis = analysis ?? "";
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if (hasDeferralAnalysis(coalescedAnalysis)) {
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throw new Error(
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`Deferral analysis is not allowed for message ${finalId}; return a direct moderation decision`,
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);
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}
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const normalizedScore = clampScore(score);
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const normalizedConfidence = clampScore(confidence, normalizedScore);
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const normalizedSeverity =
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severity ?? deriveSeverity(status, normalizedScore);
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return {
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messageId: finalId,
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status: status as "clean" | "warn" | "flagged",
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flags: flags ?? [],
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score: normalizedScore,
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analysis: coalescedAnalysis,
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categories: categories ?? flags ?? [],
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severity: normalizedSeverity,
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confidence: normalizedConfidence,
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recommendedAction:
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recommended_action ??
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deriveRecommendedAction(status, normalizedSeverity),
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policyVersion: policy_version ?? "default-2026-05-30",
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evidence: evidence ?? [],
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};
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});
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const filteredResults = results.filter(
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(r): r is AnalysisResult => r !== null,
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);
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const missingIds = targetIds.filter((id) => !foundIds.has(id));
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if (missingIds.length > 0) {
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log.warn(
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{ missingIds, foundCount: foundIds.size, totalCount: targetIds.length },
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"Some target IDs missing in response - marking as incomplete",
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);
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for (const missingId of missingIds) {
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filteredResults.push({
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messageId: missingId,
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status: "error",
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flags: ["analysis_incomplete"],
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score: 0,
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analysis: sanitizeErrorMessage(
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"Analysis incomplete - LLM did not process this message",
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missingId,
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),
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categories: ["analysis_incomplete"],
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severity: "none",
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confidence: 0,
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recommendedAction: "review",
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policyVersion: "default-2026-05-30",
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evidence: [],
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});
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}
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}
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return filteredResults;
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}
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interface ModerationInput {
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targets: MessageRecord[];
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contextText: string;
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attachments?: AttachmentRecord[];
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}
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interface ModerationOutput {
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results: AnalysisResult[];
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raw: unknown;
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}
|
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|
|
/**
|
|
* Sniff the first bytes of a buffer to determine if it is a supported image
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|
* format. Returns the canonical MIME type string on success, or null if the
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* bytes are not a recognizable image.
|
|
*/
|
|
function sniffImageMimeType(buf: Buffer): string | null {
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if (buf.length < 12) return null;
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|
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if (buf[0] === 0xff && buf[1] === 0xd8 && buf[2] === 0xff) {
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return "image/jpeg";
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}
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|
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if (
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buf[0] === 0x89 &&
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buf[1] === 0x50 &&
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buf[2] === 0x4e &&
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buf[3] === 0x47 &&
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buf[4] === 0x0d &&
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buf[5] === 0x0a &&
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buf[6] === 0x1a &&
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buf[7] === 0x0a
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) {
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return "image/png";
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}
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|
|
|
if (
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buf[0] === 0x47 &&
|
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buf[1] === 0x49 &&
|
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buf[2] === 0x46 &&
|
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buf[3] === 0x38
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) {
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return "image/gif";
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|
}
|
|
|
|
if (
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buf[0] === 0x52 &&
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buf[1] === 0x49 &&
|
|
buf[2] === 0x46 &&
|
|
buf[3] === 0x46 &&
|
|
buf[8] === 0x57 &&
|
|
buf[9] === 0x45 &&
|
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buf[10] === 0x42 &&
|
|
buf[11] === 0x50
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|
) {
|
|
return "image/webp";
|
|
}
|
|
|
|
if (
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|
buf.length >= 12 &&
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|
buf[4] === 0x66 &&
|
|
buf[5] === 0x74 &&
|
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buf[6] === 0x79 &&
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buf[7] === 0x70
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) {
|
|
const brand = buf.subarray(8, 12).toString("ascii");
|
|
if (brand.startsWith("avif") || brand.startsWith("avis")) {
|
|
return "image/avif";
|
|
}
|
|
if (
|
|
brand.startsWith("mif1") ||
|
|
brand.startsWith("heic") ||
|
|
brand.startsWith("heis")
|
|
) {
|
|
return "image/heic";
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Shared types for image resolution
|
|
// ---------------------------------------------------------------------------
|
|
|
|
type MessageImagePart = {
|
|
type: "image_url";
|
|
image_url: { url: string };
|
|
sourceLabel: string;
|
|
stickerName?: string;
|
|
customEmojiId?: string;
|
|
customEmojiName?: string;
|
|
};
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Media detection helper
|
|
// ---------------------------------------------------------------------------
|
|
|
|
function hasMediaContent(
|
|
target: MessageRecord,
|
|
attachments?: AttachmentRecord[],
|
|
): boolean {
|
|
if (target.metadata) {
|
|
const evidence = extractMessageMediaEvidence(target.metadata);
|
|
if (evidence.stickers.length > 0 || evidence.embeds.length > 0) return true;
|
|
}
|
|
if (attachments?.some((a) => a.message_id === target.id)) return true;
|
|
return false;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Single-image vision analysis (reused by both text-only and media paths)
|
|
// ---------------------------------------------------------------------------
|
|
|
|
const analyzeSingleMediaImage = async (
|
|
messageId: string,
|
|
image: MessageImagePart,
|
|
): Promise<string | null> => {
|
|
const cacheKey = image.customEmojiId
|
|
? makeCustomEmojiCacheKey(image.customEmojiId)
|
|
: image.stickerName
|
|
? makeStickerCacheKey(image.stickerName)
|
|
: makeImageCacheKey(image.image_url.url);
|
|
|
|
const cached = await getCachedMediaAnalysis(cacheKey);
|
|
if (cached) {
|
|
log.debug({ cacheKey }, "Media analysis cache HIT");
|
|
return `[Media analysis for message ${messageId}] ${image.sourceLabel}: ${cached}`;
|
|
}
|
|
|
|
const promptText = image.stickerName
|
|
? buildStickerVisionPrompt(image.stickerName, messageId)
|
|
: image.customEmojiName
|
|
? buildCustomEmojiVisionPrompt(image.customEmojiName, messageId)
|
|
: buildGeneralImageVisionPrompt(image.sourceLabel, messageId);
|
|
|
|
try {
|
|
const completion = await retryWithBackoff(
|
|
async () => {
|
|
return withLlmConcurrency(async () =>
|
|
openai.chat.completions.create({
|
|
model: config.AI_LLM_VISION_MODEL ?? config.AI_LLM_MODEL,
|
|
messages: [
|
|
{
|
|
role: "user",
|
|
content: [
|
|
{
|
|
type: "text",
|
|
text: promptText,
|
|
},
|
|
{ type: "image_url", image_url: image.image_url },
|
|
],
|
|
},
|
|
],
|
|
temperature: 0.1,
|
|
top_p: 0.9,
|
|
max_tokens: 500,
|
|
stream: false,
|
|
} as OpenAI.Chat.Completions.ChatCompletionCreateParamsNonStreaming),
|
|
);
|
|
},
|
|
{
|
|
retries: 2,
|
|
minTimeout: 0,
|
|
maxTimeout: 0,
|
|
logger: log,
|
|
},
|
|
);
|
|
|
|
const content = completion.choices[0]?.message?.content?.trim();
|
|
if (!content) return null;
|
|
|
|
await upsertCachedMediaAnalysis(
|
|
cacheKey,
|
|
content,
|
|
"vision_llm",
|
|
Date.now() + 24 * 60 * 60 * 1000,
|
|
);
|
|
|
|
return `[Media analysis for message ${messageId}] ${image.sourceLabel}: ${content}`;
|
|
} catch (error) {
|
|
log.warn(
|
|
{
|
|
messageId,
|
|
error: error instanceof Error ? error.message : String(error),
|
|
},
|
|
"Vision analysis failed after retries — image not analyzed",
|
|
);
|
|
// Return a clear signal that vision analysis FAILED — so batch LLM knows
|
|
// the image could not be described and must NOT assume it's clean.
|
|
return `[Media analysis for message ${messageId}] ${image.sourceLabel}: GAGAL DIANALISIS — gambar tidak dapat diunduh atau vision API gagal setelah 3x percobaan. JANGAN mengasumsikan gambar aman hanya karena gagal dianalisis. Gunakan metadata URL/nama file saja sebagai petunjuk.`;
|
|
}
|
|
};
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Shared LLM call + parse + fallback helper
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/**
|
|
* State object shared between the caller and callModerationLLM so that
|
|
* parse-error feedback can be injected into subsequent retry attempts.
|
|
*
|
|
* The caller creates this object, passes it to callModerationLLM, and
|
|
* the internal retry loop mutates it before re-invoking buildContent().
|
|
*/
|
|
interface RetryState {
|
|
lastParseError: string | null;
|
|
lastInvalidContent: string | null;
|
|
}
|
|
|
|
/**
|
|
* Execute a single LLM moderation call (batch or single-message) with retry
|
|
* logic, JSON parse, and fallback error markers on failure.
|
|
*
|
|
* Uses JSON Schema response format (R2) and concurrency limiter (R3).
|
|
*/
|
|
async function callModerationLLM(
|
|
buildContent: (state: RetryState) => Promise<string>,
|
|
targetIds: string[],
|
|
label: string,
|
|
): Promise<{
|
|
results: AnalysisResult[];
|
|
raw: OpenAI.Chat.Completions.ChatCompletion | null;
|
|
}> {
|
|
const state: RetryState = {
|
|
lastParseError: null,
|
|
lastInvalidContent: null,
|
|
};
|
|
|
|
let parsed: AnalysisResult[];
|
|
let result: OpenAI.Chat.Completions.ChatCompletion | null = null;
|
|
|
|
try {
|
|
const analysis = await retryWithBackoff(
|
|
async () => {
|
|
try {
|
|
const content = await buildContent(state);
|
|
|
|
const completion = await withLlmConcurrency(async () =>
|
|
openai.chat.completions.create({
|
|
model: config.AI_LLM_MODEL,
|
|
messages: [{ role: "user", content }],
|
|
temperature: 0.2,
|
|
top_p: 0.95,
|
|
// Reduced from 16384 — JSON Schema enforces structure (R2)
|
|
max_tokens: 4096,
|
|
response_format: {
|
|
type: "json_schema",
|
|
json_schema: {
|
|
name: "moderation_result",
|
|
schema: MODERATION_JSON_SCHEMA,
|
|
strict: true,
|
|
},
|
|
},
|
|
stream: false,
|
|
} as OpenAI.Chat.Completions.ChatCompletionCreateParamsNonStreaming),
|
|
);
|
|
|
|
if (
|
|
!completion.choices ||
|
|
!Array.isArray(completion.choices) ||
|
|
!completion.choices[0]
|
|
) {
|
|
throw new Error("Invalid LLM response structure");
|
|
}
|
|
|
|
const rawContent = completion.choices[0].message?.content;
|
|
if (!rawContent) {
|
|
throw new Error("No content in LLM response");
|
|
}
|
|
|
|
try {
|
|
return {
|
|
parsed: parseModerationResponse(rawContent, targetIds),
|
|
result: completion,
|
|
};
|
|
} catch (parseError) {
|
|
state.lastParseError =
|
|
parseError instanceof Error
|
|
? parseError.message
|
|
: String(parseError);
|
|
state.lastInvalidContent = rawContent;
|
|
log.warn(
|
|
{
|
|
error: state.lastParseError,
|
|
contentLength: rawContent.length,
|
|
contentPreview: rawContent.substring(0, 1000),
|
|
targetIds,
|
|
model: config.AI_LLM_MODEL,
|
|
},
|
|
`Failed to parse moderation response from LLM (${label})`,
|
|
);
|
|
throw parseError;
|
|
}
|
|
} catch (apiError: any) {
|
|
if (
|
|
apiError?.status === 429 ||
|
|
apiError?.status === 401 ||
|
|
apiError?.status === 403
|
|
) {
|
|
throw new AbortError(apiError);
|
|
}
|
|
throw apiError;
|
|
}
|
|
},
|
|
{
|
|
retries: 0,
|
|
logger: log,
|
|
},
|
|
);
|
|
parsed = analysis.parsed;
|
|
result = analysis.result;
|
|
} catch (parseError) {
|
|
if (!state.lastInvalidContent) {
|
|
throw parseError;
|
|
}
|
|
|
|
const errorMsg =
|
|
parseError instanceof Error ? parseError.message : String(parseError);
|
|
|
|
log.error(
|
|
{
|
|
error: errorMsg,
|
|
contentLength: state.lastInvalidContent.length,
|
|
contentPreview: state.lastInvalidContent.substring(0, 500),
|
|
targetIds,
|
|
model: config.AI_LLM_MODEL,
|
|
timestamp: new Date().toISOString(),
|
|
},
|
|
`Robust Fallback (${label}): Failed to parse moderation response. Marking all targets as analysis errors.`,
|
|
);
|
|
|
|
// Sanitized error messages — no internal details exposed (R10)
|
|
const errorCode = `MOD_${Date.now().toString(36).slice(0, 6)}`;
|
|
parsed = targetIds.map((id) => ({
|
|
messageId: id,
|
|
status: "error",
|
|
flags: ["analysis_parse_failed"],
|
|
score: 0,
|
|
analysis: `Analisis gagal dan memerlukan pemeriksaan manual. Error code: ${errorCode}`,
|
|
categories: ["analysis_parse_failed"],
|
|
severity: "none",
|
|
confidence: 0,
|
|
recommendedAction: "review",
|
|
policyVersion: "default-2026-05-30",
|
|
evidence: [],
|
|
}));
|
|
}
|
|
|
|
return { results: parsed, raw: result };
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Text-only fast path — with batch size splitting (R6)
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Run a lightweight batch analysis on text-only messages.
|
|
*
|
|
* If targets exceed AI_LLM_TEXT_BATCH_SIZE, split into sub-batches
|
|
* and run sequentially to avoid overwhelming the LLM (R6).
|
|
*/
|
|
async function runTextOnlyBatch(
|
|
targets: MessageRecord[],
|
|
contextText: string,
|
|
): Promise<{ results: AnalysisResult[]; raw: unknown }> {
|
|
if (!targets.length) return { results: [], raw: null };
|
|
|
|
const maxBatchSize = config.AI_LLM_TEXT_BATCH_SIZE ?? 20;
|
|
|
|
// Pre-compute text evidence (normalization + badword detection)
|
|
const textEvidenceMap = new Map<string, string>();
|
|
await Promise.all(
|
|
targets.map(async (msg) => {
|
|
const content = msg.edited_content ?? msg.content;
|
|
const evidence = await formatModerationTextEvidenceForPrompt(content);
|
|
textEvidenceMap.set(msg.id, evidence);
|
|
}),
|
|
);
|
|
|
|
// Split into sub-batches if needed (R6)
|
|
const subBatches: MessageRecord[][] = [];
|
|
for (let i = 0; i < targets.length; i += maxBatchSize) {
|
|
subBatches.push(targets.slice(i, i + maxBatchSize));
|
|
}
|
|
|
|
if (subBatches.length > 1) {
|
|
log.info(
|
|
{
|
|
totalTargets: targets.length,
|
|
subBatchCount: subBatches.length,
|
|
maxBatchSize,
|
|
},
|
|
"Text targets exceed batch size limit — splitting into sub-batches",
|
|
);
|
|
}
|
|
|
|
const allResults: AnalysisResult[] = [];
|
|
let lastRaw: unknown = null;
|
|
|
|
// Run sub-batches sequentially to avoid rate limits
|
|
for (let i = 0; i < subBatches.length; i++) {
|
|
const batch = subBatches[i];
|
|
const targetIds = batch.map((t) => t.id);
|
|
|
|
const buildContent = async (state: RetryState): Promise<string> => {
|
|
const correction = state.lastParseError
|
|
? {
|
|
error: state.lastParseError,
|
|
preview: state.lastInvalidContent?.slice(0, 800) ?? "<empty>",
|
|
}
|
|
: undefined;
|
|
|
|
// Use modular system prompt with XML delimiters (R1, R7, R8)
|
|
const systemText = buildSystemPromptModular({
|
|
contextText,
|
|
includeMediaInstructions: false,
|
|
correction,
|
|
});
|
|
|
|
const messagesBlock = batch
|
|
.map((msg) => {
|
|
const content = msg.edited_content ?? msg.content;
|
|
const textEvidence = textEvidenceMap.get(msg.id) ?? "";
|
|
const textContext = textEvidence ? `\n${textEvidence}` : "";
|
|
// XML delimiters wrap each message for prompt safety (R1)
|
|
return `<message id="${msg.id}" user="${msg.username}">${content}${textContext}</message>`;
|
|
})
|
|
.join("\n");
|
|
|
|
// XML delimiter wraps the entire messages block (R1)
|
|
return `${systemText}\n\n<messages_to_analyze>\n${messagesBlock}\n</messages_to_analyze>`;
|
|
};
|
|
|
|
const batchResult = await callModerationLLM(
|
|
buildContent,
|
|
targetIds,
|
|
`text-batch-${i + 1}`,
|
|
);
|
|
|
|
allResults.push(...batchResult.results);
|
|
if (batchResult.raw) lastRaw = batchResult.raw;
|
|
}
|
|
|
|
log.info(
|
|
{
|
|
targetCount: targets.length,
|
|
resultCount: allResults.length,
|
|
subBatchCount: subBatches.length,
|
|
},
|
|
"Text-only batch analysis complete",
|
|
);
|
|
|
|
return { results: allResults, raw: lastRaw };
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Single media message analysis — one LLM call per message with vision + timeout (R4, R5)
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Process a single media-bearing message:
|
|
* 1. Download attachment images (resized via sharp — R5)
|
|
* 2. Fetch URLs found in the message body
|
|
* 3. Download sticker/embed images (resized via sharp — R5)
|
|
* 4. Run vision analysis on every image (with DB + sticker cache)
|
|
* 5. Build a single-message prompt with XML delimiters (R1)
|
|
* 6. One LLM call → single AnalysisResult
|
|
*
|
|
* Wrapped with overall timeout (R4).
|
|
*/
|
|
async function runSingleMediaAnalysis(
|
|
target: MessageRecord,
|
|
contextText: string,
|
|
allAttachments: AttachmentRecord[] | undefined,
|
|
): Promise<{ results: AnalysisResult[]; raw: unknown }> {
|
|
const targetId = target.id;
|
|
const targetIds = [targetId];
|
|
|
|
// Timeout wrapper (R4)
|
|
const timeoutMs = config.AI_LLM_MEDIA_ANALYSIS_TIMEOUT_MS ?? 60000;
|
|
|
|
return Promise.race([
|
|
_runSingleMediaAnalysis(
|
|
target,
|
|
contextText,
|
|
allAttachments,
|
|
targetId,
|
|
targetIds,
|
|
),
|
|
new Promise<{ results: AnalysisResult[]; raw: unknown }>((_, reject) => {
|
|
const timeout = setTimeout(
|
|
() =>
|
|
reject(
|
|
new Error(
|
|
`Media analysis timed out after ${timeoutMs}ms for message ${targetId}`,
|
|
),
|
|
),
|
|
timeoutMs,
|
|
);
|
|
timeout.unref();
|
|
}),
|
|
]);
|
|
}
|
|
|
|
async function _runSingleMediaAnalysis(
|
|
target: MessageRecord,
|
|
contextText: string,
|
|
allAttachments: AttachmentRecord[] | undefined,
|
|
targetId: string,
|
|
targetIds: string[],
|
|
): Promise<{ results: AnalysisResult[]; raw: unknown }> {
|
|
// Lazy init sticker cache
|
|
if (!isStickerCacheReady()) {
|
|
await initStickerCache({
|
|
cacheDir: config.STICKER_CACHE_DIR,
|
|
maxSizeBytes: config.STICKER_CACHE_MAX_SIZE_MB * 1024 * 1024,
|
|
}).catch((err: unknown) => {
|
|
log.warn(
|
|
{ error: err instanceof Error ? err.message : String(err) },
|
|
"Sticker cache init failed — continuing without cache",
|
|
);
|
|
});
|
|
}
|
|
|
|
// ── State maps for this single message ──
|
|
const imageMap = new Map<string, MessageImagePart[]>();
|
|
const webTextMap = new Map<string, string[]>();
|
|
const mediaAnalysisMap = new Map<string, string[]>();
|
|
|
|
const getAttachmentImageUrl = (att: AttachmentRecord): string | null =>
|
|
att.uploaded_url ?? null;
|
|
|
|
const maxDimension = config.AI_LLM_IMAGE_MAX_DIMENSION ?? 1024;
|
|
|
|
// ── 1. Download attachments for this message (with resize — R5) ──
|
|
const msgAttachments = (allAttachments ?? [])
|
|
.filter(
|
|
(att) =>
|
|
att.message_id === targetId &&
|
|
getAttachmentImageUrl(att) &&
|
|
att.type.startsWith("image/"),
|
|
)
|
|
.slice(0, 8);
|
|
|
|
await Promise.all(
|
|
msgAttachments.map(async (att) => {
|
|
const urlToUse = getAttachmentImageUrl(att);
|
|
if (!urlToUse) return;
|
|
|
|
// Check vision cache BEFORE downloading
|
|
const attVisionKey = makeImageCacheKey(urlToUse);
|
|
const cachedVision = await getCachedMediaAnalysis(attVisionKey);
|
|
if (cachedVision) {
|
|
log.debug(
|
|
{ attachmentId: att.id, cacheKey: attVisionKey },
|
|
"Vision cache HIT for attachment — skipped download",
|
|
);
|
|
const sourceLabel = `[gambar di atas adalah attachment ${att.filename} dari pesan id=${att.message_id}]`;
|
|
const analysisText = `[Media analysis for message ${att.message_id}] ${sourceLabel}: ${cachedVision}`;
|
|
const existing = mediaAnalysisMap.get(targetId) ?? [];
|
|
existing.push(analysisText);
|
|
mediaAnalysisMap.set(targetId, existing);
|
|
return;
|
|
}
|
|
|
|
const controller = new AbortController();
|
|
const timeoutId = setTimeout(() => controller.abort(), 15000);
|
|
|
|
try {
|
|
const res = await fetch(urlToUse, { signal: controller.signal });
|
|
if (!res.ok || !res.body) return;
|
|
|
|
let totalBytes = 0;
|
|
const chunks: Uint8Array[] = [];
|
|
const reader = res.body.getReader();
|
|
|
|
while (true) {
|
|
const { done, value } = await reader.read();
|
|
if (done) break;
|
|
if (value) {
|
|
totalBytes += value.length;
|
|
if (totalBytes > 10 * 1024 * 1024) {
|
|
reader.cancel();
|
|
return;
|
|
}
|
|
chunks.push(value);
|
|
}
|
|
}
|
|
|
|
const imageBytes = Buffer.concat(chunks);
|
|
const sniffedMime = sniffImageMimeType(imageBytes);
|
|
if (!sniffedMime) {
|
|
log.warn(
|
|
{ attachmentId: att.id },
|
|
"Skipping attachment: not a recognised image format",
|
|
);
|
|
return;
|
|
}
|
|
|
|
// Resize before base64 encoding (R5)
|
|
const { data: resizedBuffer, mimeType: resizedMime } =
|
|
await resizeImageForVision(imageBytes, maxDimension);
|
|
|
|
const dataUrl = `data:${resizedMime};base64,${resizedBuffer.toString("base64")}`;
|
|
const part: MessageImagePart = {
|
|
type: "image_url",
|
|
image_url: { url: dataUrl },
|
|
sourceLabel: `[gambar di atas adalah attachment ${att.filename} dari pesan id=${att.message_id}]`,
|
|
};
|
|
const existing = imageMap.get(targetId) ?? [];
|
|
existing.push(part);
|
|
imageMap.set(targetId, existing);
|
|
} catch (err) {
|
|
log.warn(
|
|
{
|
|
attachmentId: att.id,
|
|
error: err instanceof Error ? err.message : String(err),
|
|
},
|
|
"Error downloading attachment",
|
|
);
|
|
} finally {
|
|
clearTimeout(timeoutId);
|
|
}
|
|
}),
|
|
);
|
|
|
|
// ── 2. Fetch URLs found in message text ──
|
|
const content = target.edited_content ?? target.content;
|
|
const urls = extractUrlsFromText(content).slice(0, 3);
|
|
|
|
if (urls.length > 0) {
|
|
const webTexts: string[] = [];
|
|
await Promise.all(
|
|
urls.map(async (url) => {
|
|
const result = await fetchUrlSafely(url);
|
|
if (result.type === "image" && result.data && result.mimeType) {
|
|
// Resize fetched images too (R5)
|
|
const { data: resizedBuffer, mimeType: resizedMime } =
|
|
await resizeImageForVision(result.data, maxDimension);
|
|
|
|
const dataUrl = `data:${resizedMime};base64,${resizedBuffer.toString("base64")}`;
|
|
const part: MessageImagePart = {
|
|
type: "image_url",
|
|
image_url: { url: dataUrl },
|
|
sourceLabel: `[gambar di atas berasal dari link ${url} pada pesan id=${targetId}]`,
|
|
};
|
|
const existing = imageMap.get(targetId) ?? [];
|
|
existing.push(part);
|
|
imageMap.set(targetId, existing);
|
|
} else if (result.type === "text" && result.textContent) {
|
|
webTexts.push(`[Isi Web dari ${url}]: ${result.textContent}`);
|
|
}
|
|
}),
|
|
);
|
|
if (webTexts.length > 0) webTextMap.set(targetId, webTexts);
|
|
}
|
|
|
|
// ── 3. Sticker / embed / custom emoji images ──
|
|
const mediaEvidence = extractMessageMediaEvidence(target.metadata);
|
|
const mediaCandidates: Array<{
|
|
messageId: string;
|
|
url: string;
|
|
label: string;
|
|
stickerName?: string;
|
|
customEmojiId?: string;
|
|
customEmojiName?: string;
|
|
}> = [
|
|
...mediaEvidence.stickers
|
|
.filter((s) => s.url)
|
|
.map((s) => ({
|
|
messageId: targetId,
|
|
url: s.url,
|
|
label: `[gambar di atas adalah sticker "${s.name}" dari pesan id=${targetId}]`,
|
|
stickerName: s.name,
|
|
})),
|
|
...mediaEvidence.embeds.flatMap((embed) =>
|
|
[
|
|
embed.image
|
|
? {
|
|
messageId: targetId,
|
|
url: embed.image,
|
|
label: `[gambar di atas berasal dari embed image pada pesan id=${targetId}]`,
|
|
}
|
|
: null,
|
|
embed.thumbnail
|
|
? {
|
|
messageId: targetId,
|
|
url: embed.thumbnail,
|
|
label: `[gambar di atas berasal dari embed thumbnail pada pesan id=${targetId}]`,
|
|
}
|
|
: null,
|
|
].filter(
|
|
(
|
|
c,
|
|
): c is {
|
|
messageId: string;
|
|
url: string;
|
|
label: string;
|
|
stickerName?: string;
|
|
customEmojiId?: string;
|
|
customEmojiName?: string;
|
|
} => c !== null,
|
|
),
|
|
),
|
|
...mediaEvidence.customEmojis.map((emoji) => ({
|
|
messageId: targetId,
|
|
url: emoji.url,
|
|
label: `[gambar di atas adalah custom emoji "${emoji.name}" dari pesan id=${targetId}]`,
|
|
customEmojiId: emoji.id,
|
|
customEmojiName: emoji.name,
|
|
})),
|
|
];
|
|
|
|
const remainingSlots = Math.max(0, 8 - (imageMap.get(targetId)?.length ?? 0));
|
|
|
|
await Promise.all(
|
|
mediaCandidates.slice(0, remainingSlots).map(async (candidate) => {
|
|
// Vision cache check before download
|
|
const visionCacheKey = candidate.customEmojiId
|
|
? makeCustomEmojiCacheKey(candidate.customEmojiId)
|
|
: candidate.stickerName
|
|
? makeStickerCacheKey(candidate.stickerName)
|
|
: makeImageCacheKey(candidate.url);
|
|
const cachedVision = await getCachedMediaAnalysis(visionCacheKey);
|
|
if (cachedVision) {
|
|
log.debug(
|
|
{ cacheKey: visionCacheKey },
|
|
"Vision cache HIT for media candidate — skipped download",
|
|
);
|
|
const analysisText = `[Media analysis for message ${candidate.messageId}] ${candidate.label}: ${cachedVision}`;
|
|
const existing = mediaAnalysisMap.get(targetId) ?? [];
|
|
existing.push(analysisText);
|
|
mediaAnalysisMap.set(targetId, existing);
|
|
return;
|
|
}
|
|
|
|
// Sticker download cache
|
|
if (candidate.stickerName && isStickerCacheReady()) {
|
|
try {
|
|
const cached = await getStickerFromCache(candidate.stickerName);
|
|
if (cached) {
|
|
const part: MessageImagePart = {
|
|
type: "image_url",
|
|
image_url: {
|
|
url: `data:${cached.mimeType};base64,${cached.base64}`,
|
|
},
|
|
sourceLabel: candidate.label,
|
|
stickerName: candidate.stickerName,
|
|
};
|
|
const existing = imageMap.get(targetId) ?? [];
|
|
existing.push(part);
|
|
imageMap.set(targetId, existing);
|
|
return;
|
|
}
|
|
} catch {
|
|
// Fall through to fetch
|
|
}
|
|
}
|
|
|
|
const result = await fetchUrlSafely(candidate.url);
|
|
if (result.type !== "image" || !result.data || !result.mimeType) return;
|
|
|
|
// Resize sticker/emoji images too (R5)
|
|
const { data: resizedBuffer, mimeType: resizedMime } =
|
|
await resizeImageForVision(result.data, maxDimension);
|
|
|
|
const base64 = resizedBuffer.toString("base64");
|
|
if (candidate.stickerName) {
|
|
setStickerInCache(candidate.stickerName, base64, resizedMime).catch(
|
|
() => {},
|
|
);
|
|
}
|
|
|
|
const part: MessageImagePart = {
|
|
type: "image_url",
|
|
image_url: {
|
|
url: `data:${resizedMime};base64,${base64}`,
|
|
},
|
|
sourceLabel: candidate.label,
|
|
stickerName: candidate.stickerName,
|
|
customEmojiId: candidate.customEmojiId,
|
|
customEmojiName: candidate.customEmojiName,
|
|
};
|
|
const existing = imageMap.get(targetId) ?? [];
|
|
existing.push(part);
|
|
imageMap.set(targetId, existing);
|
|
}),
|
|
);
|
|
|
|
// ── 4. Vision analysis for every image ──
|
|
await Promise.all(
|
|
Array.from(imageMap.entries()).flatMap(([msgId, images]) =>
|
|
images.map(async (image) => {
|
|
const summary = await analyzeSingleMediaImage(msgId, image);
|
|
if (!summary) return;
|
|
const existing = mediaAnalysisMap.get(msgId) ?? [];
|
|
existing.push(summary);
|
|
mediaAnalysisMap.set(msgId, existing);
|
|
}),
|
|
),
|
|
);
|
|
|
|
// ── 5. Build single-message prompt with XML delimiters (R1) ──
|
|
const textEvidence = await formatModerationTextEvidenceForPrompt(content);
|
|
|
|
const webTexts = webTextMap.get(targetId) ?? [];
|
|
const mediaAnalyses = mediaAnalysisMap.get(targetId) ?? [];
|
|
const webContext = webTexts.length > 0 ? `\n${webTexts.join("\n")}` : "";
|
|
const textContext = textEvidence ? `\n${textEvidence}` : "";
|
|
const mediaAnalysisContext =
|
|
mediaAnalyses.length > 0 ? `\n${mediaAnalyses.join("\n")}` : "";
|
|
|
|
const mediaContext = [
|
|
mediaEvidence.stickers.length > 0
|
|
? mediaEvidence.stickers
|
|
.map((s) => buildStickerTextOnlyWarning(s.name, s.url))
|
|
.join(" ")
|
|
: null,
|
|
mediaEvidence.embeds.length > 0
|
|
? `[embed evidence: ${mediaEvidence.embeds
|
|
.map((e) =>
|
|
[e.title, e.description, e.url, e.image, e.thumbnail]
|
|
.filter(Boolean)
|
|
.join(" | "),
|
|
)
|
|
.join(" || ")}]`
|
|
: null,
|
|
]
|
|
.filter(Boolean)
|
|
.join(" ");
|
|
|
|
// XML delimiters wrap the message content (R1)
|
|
const messageBlock = `<message id="${target.id}" user="${target.username}">${content}${mediaContext ? ` ${mediaContext}` : ""}${textContext}${webContext}${mediaAnalysisContext}</message>`;
|
|
|
|
// Modular system prompt with XML delimiters (R1, R7, R8)
|
|
const systemText = buildSystemPromptModular({
|
|
contextText,
|
|
includeMediaInstructions: true,
|
|
});
|
|
|
|
const userContent = `${systemText}\n\n<messages_to_analyze>\n${messageBlock}\n</messages_to_analyze>`;
|
|
|
|
// ── 6. LLM call ──
|
|
const result = await callModerationLLM(
|
|
async (_state: RetryState) => userContent,
|
|
targetIds,
|
|
`media:${targetId}`,
|
|
);
|
|
|
|
return result;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Main entry point — splits text-only vs media, runs both paths in parallel
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Runs LLM-based moderation analysis on messages.
|
|
*
|
|
* Architecture:
|
|
* - **Text-only messages** → single batch LLM call (fast, no image processing)
|
|
* - Split into sub-batches if exceeding AI_LLM_TEXT_BATCH_SIZE (R6)
|
|
* - **Media messages** → each gets its own LLM call with vision API (R5: resized images)
|
|
* - Both paths execute **in parallel** — text batch does NOT wait for media.
|
|
* - All LLM calls go through concurrency limiter (R3).
|
|
*/
|
|
export async function runModerationAnalysis(
|
|
input: ModerationInput,
|
|
): Promise<ModerationOutput> {
|
|
const { targets, contextText, attachments } = input;
|
|
|
|
if (!targets.length) {
|
|
throw new Error("No targets provided for analysis");
|
|
}
|
|
|
|
// ── Split targets ──
|
|
const textOnlyTargets: MessageRecord[] = [];
|
|
const mediaTargets: MessageRecord[] = [];
|
|
|
|
for (const target of targets) {
|
|
if (hasMediaContent(target, attachments)) {
|
|
mediaTargets.push(target);
|
|
} else {
|
|
textOnlyTargets.push(target);
|
|
}
|
|
}
|
|
|
|
log.info(
|
|
{
|
|
total: targets.length,
|
|
textOnly: textOnlyTargets.length,
|
|
media: mediaTargets.length,
|
|
},
|
|
"Split targets for parallel moderation analysis",
|
|
);
|
|
|
|
// ── Run both paths in parallel ──
|
|
const [textBatchResult, ...mediaResults] = await Promise.all([
|
|
// Text-only: one fast batch call (or multiple sub-batches)
|
|
textOnlyTargets.length > 0
|
|
? runTextOnlyBatch(textOnlyTargets, contextText)
|
|
: Promise.resolve({ results: [] as AnalysisResult[], raw: null }),
|
|
|
|
// Media: each message gets its own LLM call (all in parallel, but limited by semaphore — R3)
|
|
...mediaTargets.map((target) =>
|
|
runSingleMediaAnalysis(target, contextText, attachments),
|
|
),
|
|
]);
|
|
|
|
// ── Merge ──
|
|
const allResults = [
|
|
...textBatchResult.results,
|
|
...mediaResults.flatMap((r) => r.results),
|
|
];
|
|
|
|
const raw =
|
|
textBatchResult.raw ??
|
|
(mediaResults.length > 0 ? mediaResults[0].raw : null);
|
|
|
|
log.info(
|
|
{
|
|
targetCount: targets.length,
|
|
resultCount: allResults.length,
|
|
textBatchResults: textBatchResult.results.length,
|
|
mediaResults: mediaResults.length,
|
|
},
|
|
"Moderation analysis complete",
|
|
);
|
|
|
|
return { results: allResults, raw };
|
|
}
|