photo/dist/core-types/entry.js

Photo/video library management toolset.

"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) {
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    function verb(n) { return function (v) { return step([n, v]); }; }
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        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.Entry = void 0;
var fs_1 = require("fs");
var promises_1 = __importDefault(require("fs/promises"));
var crypto_1 = __importDefault(require("crypto"));
var promises_2 = require("stream/promises");
var stream_1 = require("stream");
var path_1 = require("path");
var lazy_1 = require("./lazy");
var Entry = /** @class */ (function () {
    function Entry(path, name, fullName, lowercasedExtension, parent, stats) {
        var _this = this;
        this.path = path;
        this.name = name;
        this.fullName = fullName;
        this.lowercasedExtension = lowercasedExtension;
        this.parent = parent;
        this.stats = stats || new lazy_1.Lazy(function () { return promises_1.default.stat(fullName); });
        this.md5 = new lazy_1.Lazy(function () { return computeMd5(_this.fullName); });
    }
    Entry.createFromPath = function (path) {
        return new Entry((0, path_1.dirname)(path), (0, path_1.basename)(path), path, (0, path_1.extname)(path).toLowerCase());
    };
    Entry.createFromPathAndName = function (path, name) {
        var fullName = (0, path_1.join)(path, name);
        return new Entry((0, path_1.dirname)(fullName), (0, path_1.basename)(fullName), fullName, (0, path_1.extname)(fullName).toLowerCase());
    };
    Entry.createFromParentAndName = function (parent, name) {
        var fullName = (0, path_1.join)(parent.fullName, name);
        return new Entry((0, path_1.dirname)(fullName), (0, path_1.basename)(fullName), fullName, (0, path_1.extname)(fullName).toLowerCase(), parent);
    };
    Entry.prototype.copyTo = function (target) {
        var _a, _b;
        return __awaiter(this, void 0, void 0, function () {
            var isSafeTarget, md5, sourceStats, targetStats, error_1, _c;
            return __generator(this, function (_d) {
                switch (_d.label) {
                    case 0: return [4 /*yield*/, target.isSafeTarget()];
                    case 1:
                        isSafeTarget = _d.sent();
                        if (!isSafeTarget) {
                            throw new Error("target is not a safe target");
                        }
                        md5 = crypto_1.default.createHash("md5");
                        _d.label = 2;
                    case 2:
                        _d.trys.push([2, 6, , 11]);
                        return [4 /*yield*/, this.stats.getValue()];
                    case 3:
                        sourceStats = _d.sent();
                        if (!sourceStats) {
                            throw (_a = this.stats.getLastError()) !== null && _a !== void 0 ? _a : new Error("source stats are unavailable");
                        }
                        return [4 /*yield*/, (0, promises_2.pipeline)((0, fs_1.createReadStream)(this.fullName), new stream_1.Transform({
                                transform: function (chunk, encoding, callback) {
                                    md5.update(chunk);
                                    callback(null, chunk);
                                },
                            }), (0, fs_1.createWriteStream)(target.fullName, { flags: "wx" }))];
                    case 4:
                        _d.sent();
                        this.md5.setValue(md5.digest("hex"));
                        target.stats.reset();
                        return [4 /*yield*/, target.stats.getValue()];
                    case 5:
                        targetStats = _d.sent();
                        if (!targetStats) {
                            throw (_b = target.stats.getLastError()) !== null && _b !== void 0 ? _b : new Error("target stats are unavailable");
                        }
                        if (targetStats.size !== sourceStats.size) {
                            throw new Error("Copy verification failed: expected ".concat(sourceStats.size, " bytes, got ").concat(targetStats.size, " bytes"));
                        }
                        return [3 /*break*/, 11];
                    case 6:
                        error_1 = _d.sent();
                        _d.label = 7;
                    case 7:
                        _d.trys.push([7, 9, , 10]);
                        return [4 /*yield*/, promises_1.default.unlink(target.fullName)];
                    case 8:
                        _d.sent();
                        return [3 /*break*/, 10];
                    case 9:
                        _c = _d.sent();
                        return [3 /*break*/, 10];
                    case 10: throw error_1;
                    case 11: return [2 /*return*/];
                }
            });
        });
    };
    Entry.prototype.ensurePath = function () {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4 /*yield*/, promises_1.default.mkdir(this.path, { recursive: true })];
                    case 1:
                        _a.sent();
                        return [2 /*return*/];
                }
            });
        });
    };
    Entry.prototype.isSafeTarget = function () {
        return __awaiter(this, void 0, void 0, function () {
            var stats;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4 /*yield*/, this.stats.getValue()];
                    case 1:
                        stats = _a.sent();
                        if (stats) {
                            return [2 /*return*/, false];
                        }
                        return [4 /*yield*/, this.ensurePath()];
                    case 2:
                        _a.sent();
                        return [2 /*return*/, true];
                }
            });
        });
    };
    return Entry;
}());
exports.Entry = Entry;
function computeMd5(filePath) {
    return __awaiter(this, void 0, void 0, function () {
        var hash;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    hash = crypto_1.default.createHash("md5");
                    return [4 /*yield*/, (0, promises_2.pipeline)((0, fs_1.createReadStream)(filePath), new stream_1.Transform({
                            transform: function (chunk, encoding, callback) {
                                hash.update(chunk);
                                callback(null, chunk);
                            },
                        }))];
                case 1:
                    _a.sent();
                    return [2 /*return*/, hash.digest("hex")];
            }
        });
    });
}