@ngx-cache/fs-storage/bundles/ngx-cache-fs-storage.umd.js

Fs storage for ngx-cache (server platform)

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core'), require('@ngx-cache/core'), require('events'), require('fs'), require('path')) :
    typeof define === 'function' && define.amd ? define('@ngx-cache/fs-storage', ['exports', '@angular/core', '@ngx-cache/core', 'events', 'fs', 'path'], factory) :
    (global = global || self, factory((global['ngx-cache'] = global['ngx-cache'] || {}, global['ngx-cache']['fs-storage'] = {}), global.ng.core, global.ngxCache_core, global.events, global.fs, global.path));
}(this, (function (exports, core, core$1, events, fs, path) { 'use strict';

    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation. All rights reserved.
    Licensed under the Apache License, Version 2.0 (the "License"); you may not use
    this file except in compliance with the License. You may obtain a copy of the
    License at http://www.apache.org/licenses/LICENSE-2.0

    THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
    WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
    MERCHANTABLITY OR NON-INFRINGEMENT.

    See the Apache Version 2.0 License for specific language governing permissions
    and limitations under the License.
    ***************************************************************************** */
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    var FsStorageLoader = (function () {
        function FsStorageLoader() {
        }
        return FsStorageLoader;
    }());
    var FsStorageStaticLoader = (function () {
        function FsStorageStaticLoader(providedSettings) {
            if (providedSettings === void 0) { providedSettings = {
                path: './.cache',
                quota: 5 * 1024 * 1024
            }; }
            this.providedSettings = providedSettings;
        }
        Object.defineProperty(FsStorageStaticLoader.prototype, "path", {
            get: function () {
                return this.providedSettings.path;
            },
            enumerable: true,
            configurable: true
        });
        Object.defineProperty(FsStorageStaticLoader.prototype, "quota", {
            get: function () {
                return this.providedSettings.quota;
            },
            enumerable: true,
            configurable: true
        });
        return FsStorageStaticLoader;
    }());

    var FsEvent = (function () {
        function FsEvent(key, oldValue, newValue, pid, area) {
            if (area === void 0) { area = 'fs-storage'; }
            this.key = key;
            this.oldValue = oldValue;
            this.newValue = newValue;
            this.pid = pid;
            this.area = area;
        }
        return FsEvent;
    }());

    var FsItemMetadata = (function () {
        function FsItemMetadata(key, index) {
            this.key = key;
            this.index = index;
        }
        return FsItemMetadata;
    }());

    var FsStorageService = (function (_super) {
        __extends(FsStorageService, _super);
        function FsStorageService(loader) {
            var _this = _super.call(this) || this;
            _this.loader = loader;
            _this.instances = {};
            _this.path = path.resolve(_this.loader.path);
            _this.quota = _this.loader.quota;
            if (_this.instances[_this.path]) {
                return _this.instances[_this.path];
            }
            _this.length = 0;
            _this.keys = [];
            _this.pid = "pid:" + process.pid;
            _this.metadata = new Map();
            _this.bytesUsed = 0;
            try {
                var stat_1 = fs.statSync(_this.path);
                if (!stat_1.hasOwnProperty('isDirectory')) {
                    throw new Error("A file exists at the location " + _this.path + " when trying to create/open localStorage");
                }
                _this.length = 0;
                _this.keys = fs.readdirSync(_this.path);
                _this.bytesUsed = 0;
                var decodedKeys_1 = [];
                _this.keys.forEach(function (key, index) {
                    var decodedKey = decodeURIComponent(key);
                    decodedKeys_1.push(decodedKey);
                    var item = new FsItemMetadata(key, index);
                    _this.metadata[decodedKey] = item;
                    stat_1 = _this.getStats(key);
                    if (!stat_1.hasOwnProperty('size')) {
                        item.size = stat_1.size;
                        _this.metadata[decodedKey] = item;
                        _this.bytesUsed += stat_1.size;
                    }
                });
                _this.keys = decodedKeys_1;
                _this.length = _this.keys.length;
            }
            catch (error) {
                fs.mkdirSync(_this.path);
            }
            _this.instances[_this.path] = _this;
            return _this;
        }
        FsStorageService.prototype.setItem = function (key, value) {
            var hasListeners = events.EventEmitter.listenerCount(this, 'fs-storage');
            var oldValue = hasListeners ? this.getItem(key) : undefined;
            var item = this.metadata[key];
            var oldLength = item ? item.size : 0;
            if (this.bytesUsed - oldLength + Number(value.toString().length) > this.quota) {
                throw new Error("Disk quota (" + this.quota / 1024 + "KB) has been reached!");
            }
            var encodedKey = encodeURIComponent(key);
            var filename = path.join(this.path, encodedKey);
            fs.writeFileSync(filename, value.toString(), 'utf8');
            if (!item) {
                item = new FsItemMetadata(encodedKey, this.keys.push(key) - 1);
                item.size = value.toString().length;
                this.length += 1;
                this.metadata[key] = item;
                this.bytesUsed += value.toString().length;
            }
            if (!hasListeners) {
                return false;
            }
            var e = new FsEvent(key, oldValue, value, this.pid);
            return this.emit('fs-storage', e);
        };
        FsStorageService.prototype.getItem = function (key) {
            var item = this.metadata[key];
            if (item) {
                var filename = path.join(this.path, item.key);
                try {
                    return fs.readFileSync(filename, 'utf8');
                }
                catch (error) {
                    this.removeItem(key);
                }
            }
            return undefined;
        };
        FsStorageService.prototype.removeItem = function (key) {
            var _this = this;
            var hasListeners = events.EventEmitter.listenerCount(this, 'fs-storage');
            var oldValue = hasListeners ? this.getItem(key) : undefined;
            var item = this.metadata[key];
            if (item) {
                delete this.metadata[key];
                this.length -= 1;
                this.bytesUsed -= item.size;
                this.keys.splice(item.index, 1);
                var metadataRef = this.metadata;
                metadataRef.forEach(function (k) {
                    var i = _this.metadata[k];
                    if (i.index > item.index) {
                        i.index -= 1;
                    }
                });
                var itemPath = path.join(this.path, item.key);
                try {
                    this.deletePath(itemPath);
                }
                catch (error) {
                }
                if (!hasListeners) {
                    return false;
                }
                var e = new FsEvent(key, oldValue, undefined, this.pid);
                return this.emit('fs-storage', e);
            }
            return false;
        };
        FsStorageService.prototype.key = function (index) {
            return this.keys[index];
        };
        FsStorageService.prototype.clear = function () {
            this.deleteDirectory(this.path);
            this.length = 0;
            this.keys = [];
            this.metadata = new Map();
            this.bytesUsed = 0;
            var hasListeners = events.EventEmitter.listenerCount(this, 'fs-storage');
            if (!hasListeners) {
                return false;
            }
            var e = new FsEvent(undefined, undefined, undefined, this.pid);
            return this.emit('fs-storage', e);
        };
        FsStorageService.prototype.getStats = function (key) {
            var filename = path.join(this.path, encodeURIComponent(key));
            try {
                return fs.statSync(filename);
            }
            catch (error) {
                return undefined;
            }
        };
        FsStorageService.prototype.deleteDirectory = function (dirPath) {
            var _this = this;
            var contents = fs.readdirSync(dirPath);
            contents.forEach(function (path$1) {
                var joined = path.join(dirPath, path$1);
                _this.deletePath(joined);
            });
        };
        FsStorageService.prototype.deletePath = function (path) {
            var isDirectory = fs.statSync(path).isDirectory();
            if (isDirectory) {
                this.deleteDirectory(path);
                fs.rmdirSync(path);
            }
            else {
                fs.unlinkSync(path);
            }
        };
        FsStorageService.prototype.deleteInstance = function () {
            delete this.instances[this.path];
            this.deletePath(this.path);
            this.length = 0;
            this.keys = [];
            this.metadata = new Map();
            this.bytesUsed = 0;
        };
        FsStorageService.ɵfac = function FsStorageService_Factory(t) { return new (t || FsStorageService)(core.ɵɵinject(FsStorageLoader)); };
        FsStorageService.ɵprov = core.ɵɵdefineInjectable({ token: FsStorageService, factory: FsStorageService.ɵfac });
        return FsStorageService;
    }(core$1.Storage));
    (function () { core.ɵsetClassMetadata(FsStorageService, [{
            type: core.Injectable
        }], function () { return [{ type: FsStorageLoader }]; }, null); })();

    var fsStorageFactory = function () { return new FsStorageStaticLoader(); };

    exports.FsStorageLoader = FsStorageLoader;
    exports.FsStorageService = FsStorageService;
    exports.FsStorageStaticLoader = FsStorageStaticLoader;
    exports.fsStorageFactory = fsStorageFactory;

    Object.defineProperty(exports, '__esModule', { value: true });

})));
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