@nsfwspy/node/dist/index.js

A nudity/pornography image classifier built for Node.js.

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (_) try {
            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                    if (t[2]) _.ops.pop();
                    _.trys.pop(); continue;
            }
            op = body.call(thisArg, _);
        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.NsfwSpyResult = exports.NsfwSpy = void 0;
var tf = require("@tensorflow/tfjs-node");
var fs = require("fs");
tf.enableProdMode();
var NsfwSpy = /** @class */ (function () {
    function NsfwSpy(modelPath) {
        this.imageSize = 224;
        this.modelPath = modelPath;
        this.model = null;
    }
    NsfwSpy.prototype.load = function (loadOptions) {
        return __awaiter(this, void 0, void 0, function () {
            var _a;
            return __generator(this, function (_b) {
                switch (_b.label) {
                    case 0:
                        _a = this;
                        return [4 /*yield*/, tf.loadGraphModel(this.modelPath, loadOptions)];
                    case 1:
                        _a.model = _b.sent();
                        return [2 /*return*/];
                }
            });
        });
    };
    NsfwSpy.prototype.classifyImageFromByteArray = function (imageBuffer) {
        return __awaiter(this, void 0, void 0, function () {
            var outputs, data;
            var _this = this;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        outputs = tf.tidy(function () {
                            if (!_this.model)
                                throw new Error("The NsfwSpy model has not been loaded yet.");
                            var decodedImage = tf.node.decodeImage(imageBuffer, 3)
                                .toFloat()
                                .div(tf.scalar(255));
                            var resizedImage = tf.image.resizeBilinear(decodedImage, [_this.imageSize, _this.imageSize], true);
                            var image = resizedImage.reshape([1, _this.imageSize, _this.imageSize, 3]);
                            return _this.model.execute({ 'import/input': image }, ['Score']);
                        });
                        return [4 /*yield*/, outputs.data()];
                    case 1:
                        data = _a.sent();
                        outputs.dispose();
                        return [2 /*return*/, new NsfwSpyResult(data)];
                }
            });
        });
    };
    NsfwSpy.prototype.classifyImageFile = function (filePath) {
        return __awaiter(this, void 0, void 0, function () {
            var imageBuffer;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4 /*yield*/, fs.readFileSync(filePath)];
                    case 1:
                        imageBuffer = _a.sent();
                        return [2 /*return*/, this.classifyImageFromByteArray(imageBuffer)];
                }
            });
        });
    };
    return NsfwSpy;
}());
exports.NsfwSpy = NsfwSpy;
var NsfwSpyResult = /** @class */ (function () {
    function NsfwSpyResult(results) {
        this.hentai = results[0];
        this.neutral = results[1];
        this.pornography = results[2];
        this.sexy = results[3];
        this.predictedLabel = this.toDictionary()[0].key;
    }
    Object.defineProperty(NsfwSpyResult.prototype, "isNsfw", {
        get: function () {
            return this.neutral < 0.5;
        },
        enumerable: false,
        configurable: true
    });
    NsfwSpyResult.prototype.toDictionary = function () {
        var dictionary = [
            { key: "hentai", value: this.hentai },
            { key: "neutral", value: this.neutral },
            { key: "pornography", value: this.pornography },
            { key: "sexy", value: this.sexy }
        ];
        return dictionary.sort(function (a, b) {
            return b.value - a.value;
        });
    };
    return NsfwSpyResult;
}());
exports.NsfwSpyResult = NsfwSpyResult;