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ImageConverter.js
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ImageConverter.js
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"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 (g && (g = 0, op[0] && (_ = 0)), _) 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 };
}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ImageConverter = void 0;
var promises_1 = __importDefault(require("fs/promises"));
var sharp_1 = __importDefault(require("sharp"));
var index_1 = require("./index");
var path_1 = __importDefault(require("path"));
var ImageConverter = /** @class */ (function () {
function ImageConverter(options) {
if (options === void 0) { options = {}; }
this.minImageWidth = options.minImageWidth || index_1.OptimizerSettings.DEFAULT_MIN_IMAGE_WIDTH;
this.maxImageWidth = options.maxImageWidth || index_1.OptimizerSettings.DEFAULT_MAX_IMAGE_WIDTH;
}
/**
* Loads an image from the given file path, resizes it to the given width and converts it to the given format.
* @param filePath Path to image file.
* @param width Width in pixels of available space for image.
* @param format Format of returned image.
* @returns Promise that resolves to an object containing the image data, format and mime type.
*/
ImageConverter.prototype.convertImage = function (filePath, width, format) {
return __awaiter(this, void 0, void 0, function () {
var info, img, meta, needResize, _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
width = Math.max(this.minImageWidth, Math.min(width, this.maxImageWidth));
info = null;
img = (0, sharp_1.default)(filePath).rotate();
return [4 /*yield*/, img.metadata().catch(function () { return null; })];
case 1:
meta = _b.sent();
needResize = !meta || !meta.width || meta.width > width;
img = needResize ? img.resize(width) : img; // resize
_a = format;
switch (_a) {
case 'avif': return [3 /*break*/, 2];
case 'webp': return [3 /*break*/, 4];
case 'jpg': return [3 /*break*/, 6];
case 'png': return [3 /*break*/, 8];
case 'gif': return [3 /*break*/, 10];
case 'heif': return [3 /*break*/, 12];
case 'tiff': return [3 /*break*/, 14];
case 'tif': return [3 /*break*/, 14];
}
return [3 /*break*/, 16];
case 2: return [4 /*yield*/, img.avif().toBuffer().then(function (imageData) {
return { imageData: imageData, format: format, mimeType: 'image/avif' };
})];
case 3:
info = _b.sent();
return [3 /*break*/, 18];
case 4: return [4 /*yield*/, img.webp().toBuffer().then(function (imageData) {
return { imageData: imageData, format: format, mimeType: 'image/jpg' };
})];
case 5:
info = _b.sent();
return [3 /*break*/, 18];
case 6: return [4 /*yield*/, img.jpeg().toBuffer().then(function (imageData) {
return { imageData: imageData, format: format, mimeType: 'image/jpg' };
})];
case 7:
info = _b.sent();
return [3 /*break*/, 18];
case 8: return [4 /*yield*/, img.png().toBuffer().then(function (imageData) {
return { imageData: imageData, format: format, mimeType: 'image/png' };
})];
case 9:
info = _b.sent();
return [3 /*break*/, 18];
case 10: return [4 /*yield*/, img.gif().toBuffer().then(function (imageData) {
return { imageData: imageData, format: format, mimeType: 'image/gif' };
})];
case 11:
info = _b.sent();
return [3 /*break*/, 18];
case 12: return [4 /*yield*/, img.heif().toBuffer().then(function (imageData) {
return { imageData: imageData, format: format, mimeType: 'image/gif' };
})];
case 13:
info = _b.sent();
return [3 /*break*/, 18];
case 14: return [4 /*yield*/, img.tiff().toBuffer().then(function (imageData) {
return { imageData: imageData, format: format, mimeType: 'image/gif' };
})];
case 15:
info = _b.sent();
return [3 /*break*/, 18];
case 16: return [4 /*yield*/, img.toBuffer().then(function (imageData) {
return { imageData: imageData, format: format, mimeType: 'image/' + format };
})];
case 17:
info = _b.sent();
_b.label = 18;
case 18:
if (!info)
throw new Error("Image could not be optimized");
return [2 /*return*/, info];
}
});
});
};
ImageConverter.prototype._collectImagesToConvert = function (dirPath, excludeAbsolutePaths, recursive, first) {
return __awaiter(this, void 0, void 0, function () {
var i, stats, ext, altExts, info;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
// check if dirPath should be excluded
for (i = 0; i < excludeAbsolutePaths.length; i++) {
if (dirPath.length >= excludeAbsolutePaths[i].length && dirPath.startsWith(excludeAbsolutePaths[i]))
return [2 /*return*/, []];
}
return [4 /*yield*/, promises_1.default.stat(dirPath)];
case 1:
stats = _a.sent();
if (stats.isDirectory()) {
// dirPath is directory
if ((!first && !recursive) || path_1.default.basename(dirPath).startsWith('_'))
return [2 /*return*/, Promise.resolve([])];
return [2 /*return*/, promises_1.default.readdir(dirPath).then(function (fileNames) { return __awaiter(_this, void 0, void 0, function () {
var promises, _i, fileNames_1, fileName, filePath;
return __generator(this, function (_a) {
promises = [];
for (_i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
fileName = fileNames_1[_i];
filePath = path_1.default.resolve(dirPath, fileName);
promises.push(this._collectImagesToConvert(filePath, excludeAbsolutePaths, recursive, false));
}
return [2 /*return*/, Promise.all(promises).then(function (results) { return results.reduce(function (prev, curr) { return prev.concat(curr); }, []); }).catch(function () { return []; })];
});
}); })];
}
else {
ext = path_1.default.extname(dirPath).substring(1);
altExts = index_1.OptimizerSettings.FILE_EXTENSION_TO_ALTERNATIVES[ext];
if (!altExts)
return [2 /*return*/, Promise.resolve([])];
info = {
filePath: dirPath,
altExts: altExts,
};
return [2 /*return*/, Promise.resolve([info])];
}
return [2 /*return*/];
}
});
});
};
ImageConverter.prototype._prerender = function (storage, scaleFactor, dirPath, excludeAbsolutePaths, recursive) {
return __awaiter(this, void 0, void 0, function () {
var imagesToConvert, promises, _loop_1, i;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._collectImagesToConvert(dirPath, excludeAbsolutePaths, recursive, true)];
case 1:
imagesToConvert = _a.sent();
promises = [];
_loop_1 = function (i) {
var fileInfo = imagesToConvert[i];
promises.push(promises_1.default.stat(fileInfo.filePath).then(function (stats) { return __awaiter(_this, void 0, void 0, function () {
var originalLastModified, localPromises, img, meta, width, _loop_2, _i, _a, altExt;
var _this = this;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
originalLastModified = stats.mtimeMs;
localPromises = [];
img = (0, sharp_1.default)(fileInfo.filePath).rotate();
return [4 /*yield*/, img.metadata().catch(function () { return null; })];
case 1:
meta = _b.sent();
width = (meta === null || meta === void 0 ? void 0 : meta.width) || this.maxImageWidth;
while (width >= this.minImageWidth) {
if (width <= this.maxImageWidth) {
_loop_2 = function (altExt) {
var WIDTH = width;
var ALT_EXT = altExt;
localPromises.push(storage.getLastModified(fileInfo.filePath, WIDTH, ALT_EXT).then(function (lastModified) { return __awaiter(_this, void 0, void 0, function () {
return __generator(this, function (_a) {
if (lastModified == null || lastModified < originalLastModified) {
return [2 /*return*/, this.convertImage(fileInfo.filePath, WIDTH, ALT_EXT).then(function (info) {
return storage.putImage(fileInfo.filePath, WIDTH, ALT_EXT, info.imageData);
})];
}
return [2 /*return*/];
});
}); }));
};
for (_i = 0, _a = fileInfo.altExts; _i < _a.length; _i++) {
altExt = _a[_i];
_loop_2(altExt);
}
}
width = Math.round(width / scaleFactor);
}
return [2 /*return*/, Promise.all(localPromises).then(function () { })];
}
});
}); }));
};
for (i = 0; i < imagesToConvert.length; i++) {
_loop_1(i);
}
return [2 /*return*/, Promise.all(promises).then(function () { })];
}
});
});
};
/**
* Pre-renders images in the given directory in all sizes and formats,
* and stores them in the given storage.
* @param storage Storage to store images in.
* @param srcDir Path to directory that contains the images.
* @param options Options for pre-rendering.
*/
ImageConverter.prototype.prerender = function (storage, srcDir, options) {
return __awaiter(this, void 0, void 0, function () {
var subDirs, scaleFactor, recursive, excludeAbsolutePaths, doMessage, startTime, promises, i;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
subDirs = !(options === null || options === void 0 ? void 0 : options.subDirs) ? ['.'] : (Array.isArray(options === null || options === void 0 ? void 0 : options.subDirs) ? options === null || options === void 0 ? void 0 : options.subDirs : [options === null || options === void 0 ? void 0 : options.subDirs]);
scaleFactor = (options === null || options === void 0 ? void 0 : options.scaleFactor) || index_1.OptimizerSettings.DEFAULT_SCALE_FACTOR;
recursive = (options === null || options === void 0 ? void 0 : options.recursive) !== undefined ? options === null || options === void 0 ? void 0 : options.recursive : index_1.OptimizerSettings.DEFAULT_PRERENDER_RECURSIVELY;
excludeAbsolutePaths = ((options === null || options === void 0 ? void 0 : options.exlucePrefixes) || index_1.OptimizerSettings.DEFAULT_EXCLUDE_PREFIXES).map(function (p) { return path_1.default.resolve(srcDir, p); });
doMessage = (options === null || options === void 0 ? void 0 : options.message) !== undefined ? options === null || options === void 0 ? void 0 : options.message : index_1.OptimizerSettings.DEFAULT_PRERENDER_MESSAGE;
startTime = Date.now();
if (doMessage)
console.log("Start pre-rendering images in directory '" + srcDir + "'");
promises = [];
for (i = 0; i < subDirs.length; i++)
if (!subDirs[i].startsWith('_'))
promises.push(this._prerender(storage, scaleFactor, path_1.default.resolve(srcDir, subDirs[i]), excludeAbsolutePaths, recursive));
return [4 /*yield*/, Promise.all(promises).then(function () { })];
case 1:
_a.sent();
if (doMessage)
console.log("Finished pre-rendering images in directory '" + srcDir + "' after " + (Math.round((Date.now() - startTime) / 100) / 10) + "s");
return [2 /*return*/];
}
});
});
};
return ImageConverter;
}());
exports.ImageConverter = ImageConverter;