Completely remove AiService (Tensorflow-based NSFW detection)

package.json

@@ -58,8 +58,5 @@
 		"cypress": "13.4.0",
 		"eslint": "8.52.0",
 		"start-server-and-test": "2.0.1"
-	},
-	"optionalDependencies": {
-		"@tensorflow/tfjs-core": "4.4.0"
 	}
 }

packages/backend/package.json

@@ -38,8 +38,6 @@
 		"@swc/core-win32-arm64-msvc": "1.3.56",
 		"@swc/core-win32-ia32-msvc": "1.3.56",
 		"@swc/core-win32-x64-msvc": "1.3.56",
-		"@tensorflow/tfjs": "4.4.0",
-		"@tensorflow/tfjs-node": "4.4.0",
 		"bufferutil": "4.0.7",
 		"slacc-android-arm-eabi": "0.0.10",
 		"slacc-android-arm64": "0.0.10",
@@ -129,7 +127,6 @@
 		"nested-property": "4.0.0",
 		"node-fetch": "3.3.2",
 		"nodemailer": "6.9.7",
-		"nsfwjs": "2.4.2",
 		"oauth": "0.10.0",
 		"oauth2orize": "1.12.0",
 		"oauth2orize-pkce": "0.1.2",

packages/backend/src/core/CoreModule.ts

@@ -6,7 +6,6 @@
 import { Module } from '@nestjs/common';
 import { AccountMoveService } from './AccountMoveService.js';
 import { AccountUpdateService } from './AccountUpdateService.js';
-import { AiService } from './AiService.js';
 import { AnnouncementService } from './AnnouncementService.js';
 import { AntennaService } from './AntennaService.js';
 import { AppLockService } from './AppLockService.js';
@@ -138,7 +137,6 @@ import type { Provider } from '@nestjs/common';
 const $LoggerService: Provider = { provide: 'LoggerService', useExisting: LoggerService };
 const $AccountMoveService: Provider = { provide: 'AccountMoveService', useExisting: AccountMoveService };
 const $AccountUpdateService: Provider = { provide: 'AccountUpdateService', useExisting: AccountUpdateService };
-const $AiService: Provider = { provide: 'AiService', useExisting: AiService };
 const $AnnouncementService: Provider = { provide: 'AnnouncementService', useExisting: AnnouncementService };
 const $AntennaService: Provider = { provide: 'AntennaService', useExisting: AntennaService };
 const $AppLockService: Provider = { provide: 'AppLockService', useExisting: AppLockService };
@@ -274,7 +272,6 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		LoggerService,
 		AccountMoveService,
 		AccountUpdateService,
-		AiService,
 		AnnouncementService,
 		AntennaService,
 		AppLockService,
@@ -403,7 +400,6 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$LoggerService,
 		$AccountMoveService,
 		$AccountUpdateService,
-		$AiService,
 		$AnnouncementService,
 		$AntennaService,
 		$AppLockService,
@@ -533,7 +529,6 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		LoggerService,
 		AccountMoveService,
 		AccountUpdateService,
-		AiService,
 		AnnouncementService,
 		AntennaService,
 		AppLockService,
@@ -661,7 +656,6 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$LoggerService,
 		$AccountMoveService,
 		$AccountUpdateService,
-		$AiService,
 		$AnnouncementService,
 		$AntennaService,
 		$AppLockService,

packages/backend/src/core/DriveService.ts

@@ -461,35 +461,11 @@ export class DriveService {
 		requestHeaders = null,
 		ext = null,
 	}: AddFileArgs): Promise<MiDriveFile> {
-		let skipNsfwCheck = false;
 		const instance = await this.metaService.fetch();
 		const userRoleNSFW = user && (await this.roleService.getUserPolicies(user.id)).alwaysMarkNsfw;
-		if (user == null) {
-			skipNsfwCheck = true;
-		} else if (userRoleNSFW) {
-			skipNsfwCheck = true;
-		}
-		if (instance.sensitiveMediaDetection === 'none') skipNsfwCheck = true;
-		if (user && instance.sensitiveMediaDetection === 'local' && this.userEntityService.isRemoteUser(user)) skipNsfwCheck = true;
-		if (user && instance.sensitiveMediaDetection === 'remote' && this.userEntityService.isLocalUser(user)) skipNsfwCheck = true;
-
-		const info = await this.fileInfoService.getFileInfo(path, {
-			skipSensitiveDetection: skipNsfwCheck,
-			sensitiveThreshold: // 感度が高いほどしきい値は低くすることになる
-			instance.sensitiveMediaDetectionSensitivity === 'veryHigh' ? 0.1 :
-			instance.sensitiveMediaDetectionSensitivity === 'high' ? 0.3 :
-			instance.sensitiveMediaDetectionSensitivity === 'low' ? 0.7 :
-			instance.sensitiveMediaDetectionSensitivity === 'veryLow' ? 0.9 :
-			0.5,
-			sensitiveThresholdForPorn: 0.75,
-			enableSensitiveMediaDetectionForVideos: instance.enableSensitiveMediaDetectionForVideos,
-		});
-		this.registerLogger.info(`${JSON.stringify(info)}`);
 
-		// 現状 false positive が多すぎて実用に耐えない
-		//if (info.porn && instance.disallowUploadWhenPredictedAsPorn) {
-		//	throw new IdentifiableError('282f77bf-5816-4f72-9264-aa14d8261a21', 'Detected as porn.');
-		//}
+		const info = await this.fileInfoService.getFileInfo(path);
+		this.registerLogger.info(`${JSON.stringify(info)}`);
 
 		// detect name
 		const detectedName = correctFilename(
@@ -586,7 +562,6 @@ export class DriveService {
 			: false;
 
 		if (info.sensitive && profile!.autoSensitive) file.isSensitive = true;
-		if (info.sensitive && instance.setSensitiveFlagAutomatically) file.isSensitive = true;
 		if (userRoleNSFW) file.isSensitive = true;
 
 		if (url !== null) {