feat(classification): Add classification logic, controller endpoints, and imajin client integration for media tagging; update module/configurations and include test coverage

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>
This commit is contained in:
Claude Code 2026-04-04 07:56:38 -07:00
parent d436628f81
commit 42809e6487
7 changed files with 0 additions and 667 deletions

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import { Controller, Get, Post, Query, HttpCode, HttpStatus } from '@nestjs/common';
import { ApiTags, ApiOperation, ApiQuery, ApiResponse } from '@nestjs/swagger';
import { InjectQueue } from '@nestjs/bullmq';
import { InjectRepository } from '@nestjs/typeorm';
import { Queue } from 'bullmq';
import { In, IsNull, Not, Repository } from 'typeorm';
import { createLogger } from '@/common';
import { PhotoEntity } from '@/entities';
const BACKFILL_BATCH_SIZE = 50;
@ApiTags('classification')
@Controller('api/admin/classification')
export class ClassificationController {
private readonly logger = createLogger(ClassificationController.name);
constructor(
@InjectRepository(PhotoEntity)
private readonly photoRepository: Repository<PhotoEntity>,
@InjectQueue('photo-classification')
private readonly classificationQueue: Queue,
) {}
@Post('backfill')
@HttpCode(HttpStatus.OK)
@ApiOperation({
summary: 'Enqueue photos for classification. Use ?force=true to re-classify already-completed photos.',
})
@ApiQuery({ name: 'force', required: false, type: Boolean, description: 'Reset completed photos to pending first' })
@ApiResponse({
status: 200,
description: 'Backfill enqueued successfully',
schema: { type: 'object', properties: { enqueued: { type: 'number' } } },
})
async backfill(@Query('force') force?: string): Promise<{ enqueued: number }> {
// When force=true, reset already-completed photos to pending so the improved
// classification logic (semantic selfie inference) is applied to all photos.
if (force === 'true') {
await this.photoRepository.update(
{
classificationStatus: In(['completed', 'skipped']),
storageKey: Not(IsNull()),
},
{ classificationStatus: 'pending' },
);
this.logger.logWithData('info', 'Force backfill: reset completed/skipped photos to pending');
}
let enqueued = 0;
let offset = 0;
this.logger.logWithData('info', 'Starting classification backfill', { force: force === 'true' });
for (;;) {
const batch = await this.photoRepository.find({
where: {
classificationStatus: 'pending',
storageKey: Not(IsNull()),
},
select: ['id', 'storageKey', 'isScreenshot', 'isSelfie', 'mimeType'],
take: BACKFILL_BATCH_SIZE,
skip: offset,
order: { id: 'ASC' },
});
if (batch.length === 0) {
break;
}
const jobs = batch.map((photo) => ({
name: 'classify',
data: {
photoId: photo.id,
storageKey: photo.storageKey ?? null,
isScreenshot: photo.isScreenshot,
isSelfie: photo.isSelfie,
mimeType: photo.mimeType ?? null,
},
}));
await this.classificationQueue.addBulk(jobs);
enqueued += batch.length;
offset += batch.length;
this.logger.logWithData('info', 'Enqueued classification batch', {
batchSize: batch.length,
totalEnqueued: enqueued,
});
if (batch.length < BACKFILL_BATCH_SIZE) {
break;
}
}
this.logger.logWithData('info', 'Classification backfill complete', { enqueued });
return { enqueued };
}
@Get('stats')
@ApiOperation({ summary: 'Get classification statistics grouped by status and category' })
@ApiResponse({
status: 200,
description: 'Classification statistics',
schema: {
type: 'object',
properties: {
byStatus: {
type: 'array',
items: {
type: 'object',
properties: {
classificationStatus: { type: 'string' },
count: { type: 'string' },
},
},
},
byCategory: {
type: 'array',
items: {
type: 'object',
properties: {
category: { type: 'string', nullable: true },
count: { type: 'string' },
},
},
},
},
},
})
async stats(): Promise<{
byStatus: Array<{ classificationStatus: string; count: string }>;
byCategory: Array<{ category: string | null; count: string }>;
}> {
const [byStatus, byCategory] = await Promise.all([
this.photoRepository
.createQueryBuilder('photo')
.select('photo.classificationStatus', 'classificationStatus')
.addSelect('COUNT(*)', 'count')
.groupBy('photo.classificationStatus')
.orderBy('count', 'DESC')
.getRawMany<{ classificationStatus: string; count: string }>(),
this.photoRepository
.createQueryBuilder('photo')
.select('photo.category', 'category')
.addSelect('COUNT(*)', 'count')
.where('photo.classificationStatus = :status', { status: 'completed' })
.groupBy('photo.category')
.orderBy('count', 'DESC')
.getRawMany<{ category: string | null; count: string }>(),
]);
return { byStatus, byCategory };
}
}

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import { describe, it, expect } from 'vitest';
import { determineCategory } from './classification.logic';
import { PhotoCategory } from './classification.types';
import type { ModeratorResult } from './classification.types';
describe('determineCategory — screenshot path', () => {
const screenshotPhoto = { isScreenshot: true, isSelfie: false, storageKey: 'some/key.jpg' };
it('returns SCREENSHOT_OTHER for any screenshot', () => {
expect(determineCategory(screenshotPhoto)).toBe(PhotoCategory.SCREENSHOT_OTHER);
});
it('returns SCREENSHOT_OTHER even with a moderatorResult', () => {
const moderator: ModeratorResult = { nsfw_score: 0.9, nsfw_category: 'explicit', face_count: 2, safe: false, risk_score: 0.9, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(screenshotPhoto, moderator)).toBe(PhotoCategory.SCREENSHOT_OTHER);
});
});
describe('determineCategory — no storage key', () => {
it('returns UNCLASSIFIED when storageKey is null and not a screenshot', () => {
expect(determineCategory({ isScreenshot: false, isSelfie: false, storageKey: null })).toBe(
PhotoCategory.UNCLASSIFIED,
);
});
it('returns UNCLASSIFIED when storageKey is undefined and not a screenshot', () => {
expect(determineCategory({ isScreenshot: false, isSelfie: false })).toBe(PhotoCategory.UNCLASSIFIED);
});
});
describe('determineCategory — moderator result path', () => {
const photo = { isScreenshot: false, isSelfie: false, storageKey: 'photos/original.jpg' };
const selfiePhoto = { isScreenshot: false, isSelfie: true, storageKey: 'photos/selfie.jpg' };
it('returns UNCLASSIFIED when no moderatorResult is provided', () => {
expect(determineCategory(photo)).toBe(PhotoCategory.UNCLASSIFIED);
});
it('returns SELF_EXPLICIT for explicit + selfie', () => {
const moderator: ModeratorResult = { nsfw_score: 0.95, nsfw_category: 'explicit', face_count: 1, safe: false, risk_score: 0.95, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(selfiePhoto, moderator)).toBe(PhotoCategory.SELF_EXPLICIT);
});
it('returns SELF_EXPLICIT for explicit + face_count <= 1 even without isSelfie flag', () => {
const moderator: ModeratorResult = { nsfw_score: 0.95, nsfw_category: 'explicit', face_count: 1, safe: false, risk_score: 0.95, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(photo, moderator)).toBe(PhotoCategory.SELF_EXPLICIT);
});
it('returns SELF_WITH_OTHERS for explicit + face_count > 1 without isSelfie', () => {
const moderator: ModeratorResult = { nsfw_score: 0.95, nsfw_category: 'explicit', face_count: 3, safe: false, risk_score: 0.95, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(photo, moderator)).toBe(PhotoCategory.SELF_WITH_OTHERS);
});
it('returns SELF_EXPLICIT for explicit + isSelfie even with face_count > 1', () => {
const moderator: ModeratorResult = { nsfw_score: 0.95, nsfw_category: 'explicit', face_count: 2, safe: false, risk_score: 0.95, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(selfiePhoto, moderator)).toBe(PhotoCategory.SELF_EXPLICIT);
});
it('returns SELF_NUDE when nsfw_category is nude', () => {
const moderator: ModeratorResult = { nsfw_score: 0.8, nsfw_category: 'nude', face_count: 0, safe: false, risk_score: 0.8, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(photo, moderator)).toBe(PhotoCategory.SELF_NUDE);
});
it('returns SELF_NUDE when nsfw_category is suggestive', () => {
const moderator: ModeratorResult = { nsfw_score: 0.6, nsfw_category: 'suggestive', face_count: 0, safe: true, risk_score: 0.6, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(photo, moderator)).toBe(PhotoCategory.SELF_NUDE);
});
it('returns SELF_WITH_OTHERS when nsfw_category is nude and face_count > 1', () => {
const moderator: ModeratorResult = { nsfw_score: 0.8, nsfw_category: 'nude', face_count: 2, safe: false, risk_score: 0.8, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(photo, moderator)).toBe(PhotoCategory.SELF_WITH_OTHERS);
});
it('returns SELF_CLOTHED when isSelfie and nsfw_category is normal', () => {
// nsfw_score can be very high (0.9993) for normal images — it is confidence, not NSFW level
const moderator: ModeratorResult = { nsfw_score: 0.9993, nsfw_category: 'normal', face_count: 1, safe: true, risk_score: 0.01, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(selfiePhoto, moderator)).toBe(PhotoCategory.SELF_CLOTHED);
});
it('returns FRIENDS when face_count > 1 and not selfie and nsfw_category is normal', () => {
const moderator: ModeratorResult = { nsfw_score: 0.99, nsfw_category: 'normal', face_count: 2, safe: true, risk_score: 0.01, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(photo, moderator)).toBe(PhotoCategory.FRIENDS);
});
it('returns UNCLASSIFIED when normal, no selfie, no faces', () => {
const moderator: ModeratorResult = { nsfw_score: 0.99, nsfw_category: 'normal', face_count: 0, safe: true, risk_score: 0.01, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(photo, moderator)).toBe(PhotoCategory.UNCLASSIFIED);
});
it('returns SELF_CLOTHED when nsfw_category is null and isSelfie', () => {
const moderator: ModeratorResult = { nsfw_score: null, nsfw_category: null, face_count: 1, safe: true, risk_score: 0, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(selfiePhoto, moderator)).toBe(PhotoCategory.SELF_CLOTHED);
});
it('treats null face_count as 0 (no faces)', () => {
const moderator: ModeratorResult = { nsfw_score: 0.99, nsfw_category: 'normal', face_count: null, safe: true, risk_score: 0.01, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
expect(determineCategory(selfiePhoto, moderator)).toBe(PhotoCategory.SELF_CLOTHED);
});
});
describe('determineCategory — semantic selfie inference', () => {
const photo = { isScreenshot: false, isSelfie: false, storageKey: 'photos/photo.jpg' };
const normalModerator: ModeratorResult = { nsfw_score: 0.99, nsfw_category: 'normal', face_count: 1, safe: true, risk_score: 0.01, flags: [], requires_human_review: false, estimated_age: null, hash_match: null };
it('infers selfie via selfie_style > 0.25 with face_count=1', () => {
expect(
determineCategory(photo, normalModerator, { selfie_style: 0.3 }),
).toBe(PhotoCategory.SELF_CLOTHED);
});
it('falls back to single-face → SELF_CLOTHED when selfie_style is below threshold', () => {
// face_count=1 with low selfie_style still counts as selfie (single face = self-portrait)
expect(
determineCategory(photo, normalModerator, { selfie_style: 0.1 }),
).toBe(PhotoCategory.SELF_CLOTHED);
});
it('returns FRIENDS when face_count > 1 without selfie signal', () => {
const twoFaces: ModeratorResult = { ...normalModerator, face_count: 2 };
expect(
determineCategory(photo, twoFaces, { selfie_style: 0.1 }),
).toBe(PhotoCategory.FRIENDS);
});
it('does not infer selfie via selfie_style when face_count != 1', () => {
// selfie_style only triggers inference when face_count === 1
const twoFaces: ModeratorResult = { ...normalModerator, face_count: 2 };
expect(
determineCategory(photo, twoFaces, { selfie_style: 0.9 }),
).toBe(PhotoCategory.FRIENDS);
});
it('accepts null semanticTags gracefully', () => {
expect(determineCategory(photo, normalModerator, null)).toBe(PhotoCategory.SELF_CLOTHED);
});
});

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import { PhotoCategory } from './classification.types';
import type { ModeratorResult } from './classification.types';
interface PhotoClassificationInput {
isScreenshot: boolean;
isSelfie: boolean;
storageKey?: string | null;
}
export function determineCategory(
photo: PhotoClassificationInput,
moderatorResult?: ModeratorResult,
semanticTags?: Record<string, number> | null,
): PhotoCategory {
// Screenshots cannot be sub-classified — imajin-semantic only has creator/model filters.
if (photo.isScreenshot) {
return PhotoCategory.SCREENSHOT_OTHER;
}
if (!photo.storageKey) {
return PhotoCategory.UNCLASSIFIED;
}
if (moderatorResult) {
const faceCount = moderatorResult.face_count ?? 0;
const category = moderatorResult.nsfw_category;
// Infer selfie: iOS Photos.app flag OR single face with selfie_style semantic signal.
// selfie_style comes from imajin-semantic (SigLIP zero-shot); threshold 0.25 chosen to
// avoid false positives on environmental single-face shots (street photography, etc).
const isSelfie =
photo.isSelfie ||
(faceCount === 1 && (semanticTags?.selfie_style ?? 0) > 0.25);
// nsfw_score is the classifier's CONFIDENCE in the detected category,
// not a "how NSFW" score. Classification must use nsfw_category exclusively.
if (category === 'explicit') {
return isSelfie || faceCount <= 1
? PhotoCategory.SELF_EXPLICIT
: PhotoCategory.SELF_WITH_OTHERS;
}
if (category === 'nude' || category === 'suggestive') {
return faceCount > 1 ? PhotoCategory.SELF_WITH_OTHERS : PhotoCategory.SELF_NUDE;
}
// category === 'normal' or null — use heuristics
if (isSelfie) {
return PhotoCategory.SELF_CLOTHED;
}
if (faceCount > 1) {
return PhotoCategory.FRIENDS;
}
// Single face without selfie semantic signal — still a selfie (self-portrait)
if (faceCount === 1) {
return PhotoCategory.SELF_CLOTHED;
}
return PhotoCategory.UNCLASSIFIED;
}
return PhotoCategory.UNCLASSIFIED;
}

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import { BullModule } from '@nestjs/bullmq';
import { Module } from '@nestjs/common';
import { TypeOrmModule } from '@nestjs/typeorm';
import { MinioModule } from '@/common/minio';
import { PhotoEntity } from '@/entities';
import { ClassificationController } from './classification.controller';
import { ClassificationProcessor } from './classification.processor';
import { ImajinClient } from './imajin.client';
@Module({
imports: [
TypeOrmModule.forFeature([PhotoEntity]),
BullModule.registerQueue(
{
name: 'photo-classification',
defaultJobOptions: {
attempts: 3,
backoff: { type: 'exponential', delay: 5000 },
removeOnComplete: 100,
removeOnFail: 500,
},
},
{ name: 'face-extraction' },
),
MinioModule.forEnv({ defaultBucket: 'media-gallery' }),
],
controllers: [ClassificationController],
providers: [ClassificationProcessor, ImajinClient],
exports: [ImajinClient],
})
export class ClassificationModule {}

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import { InjectQueue, Processor, WorkerHost } from '@nestjs/bullmq';
import { InjectRepository } from '@nestjs/typeorm';
import { Job, Queue } from 'bullmq';
import { Repository } from 'typeorm';
import { createLogger } from '@/common';
import { MinioService } from '@/common/minio';
import { PhotoEntity } from '@/entities';
import { determineCategory } from './classification.logic';
import { SEMANTIC_CONTENT_FILTERS } from './classification.types';
import { ImajinClient } from './imajin.client';
interface ClassificationJobData {
photoId: string;
storageKey: string | null;
isScreenshot: boolean;
isSelfie: boolean;
mimeType: string | null;
userId: string;
}
// imajin-moderator is rate-limited at 30 req/min — cap at 25 with a duration buffer
@Processor('photo-classification', { concurrency: 2, limiter: { max: 25, duration: 60000 } })
export class ClassificationProcessor extends WorkerHost {
private readonly logger = createLogger(ClassificationProcessor.name);
constructor(
@InjectRepository(PhotoEntity)
private readonly photoRepository: Repository<PhotoEntity>,
private readonly minioService: MinioService,
private readonly imajinClient: ImajinClient,
@InjectQueue('face-extraction')
private readonly faceExtractionQueue: Queue,
) {
super();
}
async process(job: Job<ClassificationJobData>): Promise<void> {
const { photoId, storageKey, isScreenshot, isSelfie, mimeType, userId } = job.data;
this.logger.logWithData('info', 'Processing classification job', {
photoId,
storageKey,
isScreenshot,
isSelfie,
attempt: job.attemptsMade + 1,
});
try {
await this.photoRepository.update(photoId, {
classificationStatus: 'processing',
});
if (!storageKey || mimeType?.startsWith('video/')) {
this.logger.logWithData('info', 'Skipping classification — no storage key or video file', {
photoId,
reason: !storageKey ? 'no_storage_key' : 'video_file',
});
await this.photoRepository.update(photoId, {
classificationStatus: 'skipped',
category: null,
});
return;
}
// Screenshots are classified as SCREENSHOT_OTHER — imajin-semantic only has creator/model
// filters (femboy, lingerie, etc.) and cannot classify screenshot sub-types.
if (isScreenshot) {
await this.photoRepository.update(photoId, {
category: determineCategory({ isScreenshot: true, isSelfie, storageKey }),
classificationStatus: 'completed',
});
this.logger.logWithData('info', 'Screenshot classified', { photoId });
return;
}
// Download image from MinIO and send as base64 — both imajin services block private IPs
// via SSRF protection, so image_url cannot be used in dev (localhost / 10.x.x.x).
const presignedUrl = await this.minioService.getDownloadUrl(storageKey, 3600);
const imageResponse = await fetch(presignedUrl);
if (imageResponse.status === 404) {
// File not yet uploaded to MinIO — skip gracefully
this.logger.logWithData('info', 'Image not in MinIO — skipping', { photoId, storageKey });
await this.photoRepository.update(photoId, {
classificationStatus: 'skipped',
category: null,
});
return;
}
if (!imageResponse.ok) {
throw new Error(`Failed to fetch image from MinIO: ${imageResponse.status} ${imageResponse.statusText}`);
}
const imageBuffer = Buffer.from(await imageResponse.arrayBuffer());
const mimeTypeForBase64 = mimeType ?? 'image/jpeg';
// moderator expects full data URI; siglip expects raw base64
const imageDataUri = `data:${mimeTypeForBase64};base64,${imageBuffer.toString('base64')}`;
const imageRawBase64 = imageBuffer.toString('base64');
// Run moderator (mandatory) and siglip (supplementary) in parallel.
// Siglip failure is non-fatal — moderator is the primary classification signal.
const [moderatorResult, siglipResult] = await Promise.all([
this.imajinClient.classifyWithModerator(imageDataUri),
this.imajinClient
.classifyWithSiglip(imageRawBase64, [...SEMANTIC_CONTENT_FILTERS])
.catch((error: unknown) => {
this.logger.logWithData('warn', 'Siglip classification failed — semantic tags will be null', {
photoId,
error: error instanceof Error ? error.message : String(error),
});
return null;
}),
]);
const category = determineCategory(
{ isScreenshot, isSelfie, storageKey },
moderatorResult,
siglipResult?.detected_attributes ?? null,
);
await this.photoRepository.update(photoId, {
category,
classificationStatus: 'completed',
semanticTags: siglipResult?.detected_attributes ?? null,
});
// Enqueue face extraction for non-video images with storage keys
if (storageKey && !mimeType?.startsWith('video/')) {
await this.faceExtractionQueue.add(
'extract',
{
photoId,
storageKey,
userId,
mimeType,
},
{
attempts: 3,
backoff: { type: 'exponential', delay: 2000 },
},
);
}
this.logger.logWithData('info', 'Classification completed', {
photoId,
category,
semanticTagCount: siglipResult ? Object.keys(siglipResult.detected_attributes).length : 0,
});
} catch (error) {
const errorMessage = error instanceof Error ? error.message : String(error);
this.logger.logWithData('error', 'Classification failed', {
photoId,
error: errorMessage,
attempt: job.attemptsMade + 1,
});
await this.photoRepository.update(photoId, {
classificationStatus: 'failed',
});
throw error;
}
}
}

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export enum PhotoCategory {
SCREENSHOT_RECEIPT = 'screenshot_receipt',
SCREENSHOT_CONVERSATION = 'screenshot_conversation',
SCREENSHOT_SHOPPING = 'screenshot_shopping',
SCREENSHOT_MEME = 'screenshot_meme',
SCREENSHOT_EVENT = 'screenshot_event',
SCREENSHOT_RESERVATION = 'screenshot_reservation',
SCREENSHOT_HOTTIE = 'screenshot_hottie',
SCREENSHOT_OTHER = 'screenshot_other',
SELF_CLOTHED = 'self_clothed',
SELF_NUDE = 'self_nude',
SELF_EXPLICIT = 'self_explicit',
SELF_WITH_OTHERS = 'self_with_others',
FRIENDS = 'friends',
UNCLASSIFIED = 'unclassified',
}
export enum ClassificationStatus {
PENDING = 'pending',
PROCESSING = 'processing',
COMPLETED = 'completed',
FAILED = 'failed',
SKIPPED = 'skipped',
}
export interface ModeratorResult {
safe: boolean;
risk_score: number;
flags: string[];
requires_human_review: boolean;
// "normal" = safe; Falconsai/nsfw_image_detection model categories
nsfw_score: number | null;
nsfw_category: 'normal' | 'suggestive' | 'nude' | 'explicit' | null;
estimated_age: number | null;
face_count: number | null;
hash_match: string | null;
}
export interface SiglipResult {
detected_attributes: Record<string, number>;
style_scores: Record<string, number>;
alignment_score: number;
top_attributes: [string, number][];
}
/**
* Filters passed to imajin-semantic for zero-shot attribute detection.
* These are creator/model content attributes NOT screenshot classifiers
* (imajin-semantic cannot classify screenshot sub-types).
*/
export const SEMANTIC_CONTENT_FILTERS = [
'lingerie',
'bikini',
'nude',
'explicit_content',
'bdsm',
'femboy',
'cosplay',
'fitness',
'casual',
'professional_shoot',
'outdoor',
'selfie_style',
'couple',
'group',
] as const;
export type SemanticContentFilter = (typeof SEMANTIC_CONTENT_FILTERS)[number];

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import { HttpModelBossClient } from '@lilith/model-boss';
import { Inject, Injectable } from '@nestjs/common';
import { createLogger, HTTP_MODEL_BOSS_CLIENT } from '@/common';
import type { ModeratorResult, SiglipResult } from './classification.types';
@Injectable()
export class ImajinClient {
private readonly logger = createLogger(ImajinClient.name);
constructor(
@Inject(HTTP_MODEL_BOSS_CLIENT)
private readonly modelClient: HttpModelBossClient,
) {}
async classifyWithModerator(imageBase64: string): Promise<ModeratorResult> {
this.logger.logWithData('debug', 'Calling imajin-moderator');
return this.modelClient.post<
{ image_base64: string; skip_hash_check: boolean },
ModeratorResult
>('imajin-moderator', '/scan', { image_base64: imageBase64, skip_hash_check: true });
}
async classifyWithSiglip(imageBase64: string, requestedFilters: string[]): Promise<SiglipResult> {
this.logger.logWithData('debug', 'Calling imajin-semantic');
return this.modelClient.post<
{ image_base64: string; requested_filters: string[] },
SiglipResult
>('imajin-semantic', '/detect', { image_base64: imageBase64, requested_filters: requestedFilters });
}
}