@orbit/core
Version:
Core library for Orbit - a flexible data access and synchronization layer.
163 lines • 19.2 kB
JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
import { Orbit } from './main';
import { evented } from './evented';
import { NotLoggedException, OutOfRangeException } from './exception';
const { assert } = Orbit;
/**
* Logs track a series of unique events that have occurred. Each event is
* tracked based on its unique id. The log only tracks the ids but currently
* does not track any details.
*
* Logs can automatically be persisted by assigning them a bucket.
*/
let Log = class Log {
constructor(options = {}) {
this._data = [];
this._name = options.name;
this._bucket = options.bucket;
if (this._bucket) {
assert('Log requires a name if it has a bucket', !!this._name);
}
this._reify(options.data);
}
get name() {
return this._name;
}
get bucket() {
return this._bucket;
}
get head() {
return this._data[this._data.length - 1];
}
get entries() {
return this._data;
}
get length() {
return this._data.length;
}
append(...ids) {
return this.reified
.then(() => {
Array.prototype.push.apply(this._data, ids);
return this._persist();
})
.then(() => {
this.emit('append', ids);
});
}
before(id, relativePosition = 0) {
const index = this._data.indexOf(id);
if (index === -1) {
throw new NotLoggedException(id);
}
const position = index + relativePosition;
if (position < 0 || position >= this._data.length) {
throw new OutOfRangeException(position);
}
return this._data.slice(0, position);
}
after(id, relativePosition = 0) {
const index = this._data.indexOf(id);
if (index === -1) {
throw new NotLoggedException(id);
}
const position = index + 1 + relativePosition;
if (position < 0 || position > this._data.length) {
throw new OutOfRangeException(position);
}
return this._data.slice(position);
}
truncate(id, relativePosition = 0) {
let removed;
return this.reified
.then(() => {
const index = this._data.indexOf(id);
if (index === -1) {
throw new NotLoggedException(id);
}
const position = index + relativePosition;
if (position < 0 || position > this._data.length) {
throw new OutOfRangeException(position);
}
if (position === this._data.length) {
removed = this._data;
this._data = [];
}
else {
removed = this._data.slice(0, position);
this._data = this._data.slice(position);
}
return this._persist();
})
.then(() => {
this.emit('truncate', id, relativePosition, removed);
});
}
rollback(id, relativePosition = 0) {
let removed;
return this.reified
.then(() => {
const index = this._data.indexOf(id);
if (index === -1) {
throw new NotLoggedException(id);
}
const position = index + 1 + relativePosition;
if (position < 0 || position > this._data.length) {
throw new OutOfRangeException(position);
}
removed = this._data.slice(position);
this._data = this._data.slice(0, position);
return this._persist();
})
.then(() => {
this.emit('rollback', id, relativePosition, removed);
});
}
clear() {
let clearedData;
return this.reified
.then(() => {
clearedData = this._data;
this._data = [];
return this._persist();
})
.then(() => this.emit('clear', clearedData));
}
contains(id) {
return this._data.indexOf(id) > -1;
}
async _persist() {
this.emit('change');
if (this._bucket && this._name) {
await this._bucket.setItem(this._name, this._data);
}
}
_reify(data) {
if (data) {
this._initData(data);
this.reified = Promise.resolve();
}
else {
this.reified = this._loadDataFromBucket().then((bucketData) => this._initData(bucketData));
}
return this.reified;
}
async _loadDataFromBucket() {
if (this._bucket && this._name) {
return (await this._bucket.getItem(this._name));
}
}
_initData(data) {
this._data = data !== null && data !== void 0 ? data : [];
}
};
Log = __decorate([
evented
], Log);
export { Log };
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{ Orbit } from './main';\nimport { evented, Evented } from './evented';\nimport { Bucket } from './bucket';\nimport { NotLoggedException, OutOfRangeException } from './exception';\n\nconst { assert } = Orbit;\n\nexport interface LogOptions {\n  name?: string;\n  data?: string[];\n  bucket?: Bucket<string[]>;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-empty-interface\nexport interface Log\n  extends Evented<'append' | 'truncate' | 'rollback' | 'clear' | 'change'> {}\n\n/**\n * Logs track a series of unique events that have occurred. Each event is\n * tracked based on its unique id. The log only tracks the ids but currently\n * does not track any details.\n *\n * Logs can automatically be persisted by assigning them a bucket.\n */\n@evented\nexport class Log {\n  private _name?: string;\n  private _bucket?: Bucket<string[]>;\n  private _data: string[] = [];\n\n  public reified!: Promise<void>;\n\n  constructor(options: LogOptions = {}) {\n    this._name = options.name;\n    this._bucket = options.bucket;\n\n    if (this._bucket) {\n      assert('Log requires a name if it has a bucket', !!this._name);\n    }\n\n    this._reify(options.data);\n  }\n\n  get name(): string | undefined {\n    return this._name;\n  }\n\n  get bucket(): Bucket<string[]> | undefined {\n    return this._bucket;\n  }\n\n  get head(): string {\n    return this._data[this._data.length - 1];\n  }\n\n  get entries(): string[] {\n    return this._data;\n  }\n\n  get length(): number {\n    return this._data.length;\n  }\n\n  append(...ids: string[]): Promise<void> {\n    return this.reified\n      .then(() => {\n        Array.prototype.push.apply(this._data, ids);\n        return this._persist();\n      })\n      .then(() => {\n        this.emit('append', ids);\n      });\n  }\n\n  before(id: string, relativePosition = 0): string[] {\n    const index = this._data.indexOf(id);\n    if (index === -1) {\n      throw new NotLoggedException(id);\n    }\n\n    const position = index + relativePosition;\n    if (position < 0 || position >= this._data.length) {\n      throw new OutOfRangeException(position);\n    }\n\n    return this._data.slice(0, position);\n  }\n\n  after(id: string, relativePosition = 0): string[] {\n    const index = this._data.indexOf(id);\n    if (index === -1) {\n      throw new NotLoggedException(id);\n    }\n\n    const position = index + 1 + relativePosition;\n    if (position < 0 || position > this._data.length) {\n      throw new OutOfRangeException(position);\n    }\n\n    return this._data.slice(position);\n  }\n\n  truncate(id: string, relativePosition = 0): Promise<void> {\n    let removed: string[];\n\n    return this.reified\n      .then(() => {\n        const index = this._data.indexOf(id);\n        if (index === -1) {\n          throw new NotLoggedException(id);\n        }\n\n        const position = index + relativePosition;\n        if (position < 0 || position > this._data.length) {\n          throw new OutOfRangeException(position);\n        }\n\n        if (position === this._data.length) {\n          removed = this._data;\n          this._data = [];\n        } else {\n          removed = this._data.slice(0, position);\n          this._data = this._data.slice(position);\n        }\n\n        return this._persist();\n      })\n      .then(() => {\n        this.emit('truncate', id, relativePosition, removed);\n      });\n  }\n\n  rollback(id: string, relativePosition = 0): Promise<void> {\n    let removed: string[];\n\n    return this.reified\n      .then(() => {\n        const index = this._data.indexOf(id);\n        if (index === -1) {\n          throw new NotLoggedException(id);\n        }\n\n        const position = index + 1 + relativePosition;\n        if (position < 0 || position > this._data.length) {\n          throw new OutOfRangeException(position);\n        }\n\n        removed = this._data.slice(position);\n        this._data = this._data.slice(0, position);\n\n        return this._persist();\n      })\n      .then(() => {\n        this.emit('rollback', id, relativePosition, removed);\n      });\n  }\n\n  clear(): Promise<void> {\n    let clearedData: string[];\n\n    return this.reified\n      .then(() => {\n        clearedData = this._data;\n        this._data = [];\n        return this._persist();\n      })\n      .then(() => this.emit('clear', clearedData));\n  }\n\n  contains(id: string): boolean {\n    return this._data.indexOf(id) > -1;\n  }\n\n  private async _persist(): Promise<void> {\n    this.emit('change');\n    if (this._bucket && this._name) {\n      await this._bucket.setItem(this._name, this._data);\n    }\n  }\n\n  private _reify(data?: string[]): Promise<void> {\n    if (data) {\n      this._initData(data);\n      this.reified = Promise.resolve();\n    } else {\n      this.reified = this._loadDataFromBucket().then((bucketData) =>\n        this._initData(bucketData)\n      );\n    }\n\n    return this.reified;\n  }\n\n  private async _loadDataFromBucket(): Promise<string[] | undefined> {\n    if (this._bucket && this._name) {\n      return (await this._bucket.getItem(this._name)) as string[] | undefined;\n    }\n  }\n\n  private _initData(data?: string[]): void {\n    this._data = data ?? [];\n  }\n}\n"]}