@ngx-cache/fs-storage
Version:
Fs storage for ngx-cache (server platform)
185 lines • 23.9 kB
JavaScript
import { __extends } from "tslib";
import { Injectable } from '@angular/core';
import { Storage } from '@ngx-cache/core';
import { EventEmitter } from 'events';
import { mkdirSync, readdirSync, readFileSync, rmdirSync, statSync, unlinkSync, writeFileSync } from 'fs';
import { join, resolve } from 'path';
import { FsStorageLoader } from './fs-storage.loader';
import { FsEvent } from './models/fs-event';
import { FsItemMetadata } from './models/fs-item-metadata';
import * as i0 from "@angular/core";
import * as i1 from "./fs-storage.loader";
var FsStorageService = (function (_super) {
__extends(FsStorageService, _super);
function FsStorageService(loader) {
var _this = _super.call(this) || this;
_this.loader = loader;
_this.instances = {};
_this.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 = 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 = 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) {
mkdirSync(_this.path);
}
_this.instances[_this.path] = _this;
return _this;
}
FsStorageService.prototype.setItem = function (key, value) {
var hasListeners = 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 = join(this.path, encodedKey);
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 = join(this.path, item.key);
try {
return readFileSync(filename, 'utf8');
}
catch (error) {
this.removeItem(key);
}
}
return undefined;
};
FsStorageService.prototype.removeItem = function (key) {
var _this = this;
var hasListeners = 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 = 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 = 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 = join(this.path, encodeURIComponent(key));
try {
return statSync(filename);
}
catch (error) {
return undefined;
}
};
FsStorageService.prototype.deleteDirectory = function (dirPath) {
var _this = this;
var contents = readdirSync(dirPath);
contents.forEach(function (path) {
var joined = join(dirPath, path);
_this.deletePath(joined);
});
};
FsStorageService.prototype.deletePath = function (path) {
var isDirectory = statSync(path).isDirectory();
if (isDirectory) {
this.deleteDirectory(path);
rmdirSync(path);
}
else {
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)(i0.ɵɵinject(i1.FsStorageLoader)); };
FsStorageService.ɵprov = i0.ɵɵdefineInjectable({ token: FsStorageService, factory: FsStorageService.ɵfac });
return FsStorageService;
}(Storage));
export { FsStorageService };
(function () { i0.ɵsetClassMetadata(FsStorageService, [{
type: Injectable
}], function () { return [{ type: i1.FsStorageLoader }]; }, null); })();
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{ Injectable } from '@angular/core';\nimport { Storage } from '@ngx-cache/core';\nimport { EventEmitter } from 'events';\nimport { mkdirSync, readdirSync, readFileSync, rmdirSync, statSync, unlinkSync, writeFileSync } from 'fs';\nimport { join, resolve } from 'path';\n\nimport { FsStorageLoader } from './fs-storage.loader';\nimport { FsEvent } from './models/fs-event';\nimport { FsItemMetadata } from './models/fs-item-metadata';\n\n@Injectable()\nexport class FsStorageService extends Storage {\n  length: number;\n  keys: Array<string>;\n\n  private readonly instances = {};\n\n  private readonly path: string;\n  private readonly quota: number;\n  private readonly pid: string;\n\n  private metadata: Map<string, FsItemMetadata>;\n  private bytesUsed: number;\n\n  constructor(readonly loader: FsStorageLoader) {\n    super();\n\n    this.path = resolve(this.loader.path);\n    this.quota = this.loader.quota;\n\n    if (this.instances[this.path]) {\n      return this.instances[this.path];\n    }\n\n    this.length = 0;\n    this.keys = [];\n    this.pid = `pid:${process.pid}`;\n    this.metadata = new Map<string, FsItemMetadata>();\n    this.bytesUsed = 0;\n\n    try {\n      let stat = statSync(this.path);\n\n      if (!stat.hasOwnProperty('isDirectory')) {\n        throw new Error(`A file exists at the location ${this.path} when trying to create/open localStorage`);\n      }\n\n      this.length = 0;\n      this.keys = readdirSync(this.path);\n      this.bytesUsed = 0;\n\n      const decodedKeys: Array<string> = [];\n\n      this.keys.forEach((key: string, index: number) => {\n        const decodedKey = decodeURIComponent(key);\n        decodedKeys.push(decodedKey);\n\n        const item = new FsItemMetadata(key, index);\n        this.metadata[decodedKey] = item;\n\n        stat = this.getStats(key);\n\n        if (!stat.hasOwnProperty('size')) {\n          item.size = stat.size;\n          this.metadata[decodedKey] = item;\n          this.bytesUsed += stat.size;\n        }\n      });\n\n      this.keys = decodedKeys;\n      this.length = this.keys.length;\n    } catch (error) {\n      mkdirSync(this.path);\n    }\n\n    this.instances[this.path] = this;\n  }\n\n  setItem(key: string, value: any): boolean {\n    const hasListeners = EventEmitter.listenerCount(this, 'fs-storage');\n    const oldValue = hasListeners ? this.getItem(key) : undefined;\n\n    let item = this.metadata[key];\n    const oldLength = item ? item.size : 0;\n\n    if (this.bytesUsed - oldLength + Number(value.toString().length) > this.quota) {\n      throw new Error(`Disk quota (${this.quota / 1024}KB) has been reached!`);\n    }\n\n    const encodedKey = encodeURIComponent(key);\n    const filename = join(this.path, encodedKey);\n\n    writeFileSync(filename, value.toString(), 'utf8');\n\n    if (!item) {\n      item = new FsItemMetadata(encodedKey, this.keys.push(key) - 1);\n      item.size = value.toString().length;\n\n      this.length += 1;\n      this.metadata[key] = item;\n      this.bytesUsed += value.toString().length;\n    }\n\n    if (!hasListeners) {\n      return false;\n    }\n\n    const e = new FsEvent(key, oldValue, value, this.pid);\n\n    return this.emit('fs-storage', e);\n  }\n\n  getItem(key: string): any {\n    const item = this.metadata[key];\n\n    if (item) {\n      const filename = join(this.path, item.key);\n\n      try {\n        return readFileSync(filename, 'utf8');\n      } catch (error) {\n        this.removeItem(key);\n      }\n    }\n\n    return undefined;\n  }\n\n  removeItem(key: string): boolean {\n    const hasListeners = EventEmitter.listenerCount(this, 'fs-storage');\n    const oldValue = hasListeners ? this.getItem(key) : undefined;\n\n    const item = this.metadata[key];\n\n    if (item) {\n      delete this.metadata[key];\n      this.length -= 1;\n      this.bytesUsed -= item.size;\n      this.keys.splice(item.index, 1);\n\n      const metadataRef = this.metadata;\n\n      metadataRef.forEach((k: any) => {\n        const i = this.metadata[k];\n\n        if (i.index > item.index) {\n          i.index -= 1;\n        }\n      });\n\n      const itemPath = join(this.path, item.key);\n\n      try {\n        this.deletePath(itemPath);\n      } catch (error) {\n        // NOTE: seems like path can't be deleted\n      }\n\n      if (!hasListeners) {\n        return false;\n      }\n\n      const e = new FsEvent(key, oldValue, undefined, this.pid);\n\n      return this.emit('fs-storage', e);\n    }\n\n    return false;\n  }\n\n  key(index: number): any {\n    return this.keys[index];\n  }\n\n  clear(): boolean {\n    this.deleteDirectory(this.path);\n\n    this.length = 0;\n    this.keys = [];\n    this.metadata = new Map<string, FsItemMetadata>();\n    this.bytesUsed = 0;\n\n    const hasListeners = EventEmitter.listenerCount(this, 'fs-storage');\n\n    if (!hasListeners) {\n      return false;\n    }\n\n    const e = new FsEvent(undefined, undefined, undefined, this.pid);\n\n    return this.emit('fs-storage', e);\n  }\n\n  private getStats(key: string): any {\n    const filename = join(this.path, encodeURIComponent(key));\n\n    try {\n      return statSync(filename);\n    } catch (error) {\n      return undefined;\n    }\n  }\n\n  private deleteDirectory(dirPath: string): void {\n    const contents = readdirSync(dirPath);\n\n    contents.forEach((path: string) => {\n      const joined = join(dirPath, path);\n      this.deletePath(joined);\n    });\n  }\n\n  private deletePath(path: string): void {\n    const isDirectory = statSync(path).isDirectory();\n\n    if (isDirectory) {\n      this.deleteDirectory(path);\n\n      rmdirSync(path);\n    } else {\n      unlinkSync(path);\n    }\n  }\n\n  private deleteInstance(): void {\n    delete this.instances[this.path];\n    this.deletePath(this.path);\n\n    this.length = 0;\n    this.keys = [];\n    this.metadata = new Map<string, FsItemMetadata>();\n    this.bytesUsed = 0;\n  }\n}\n"]}