@foblex/mutator/fesm2022/foblex-mutator.mjs.map

Angular Signals state engine with deep patch + undo/redo and notifier.

{"version":3,"file":"foblex-mutator.mjs","sources":["../../../projects/mutator/src/lib/utils/deep-delete.ts","../../../projects/mutator/src/lib/utils/deep-merge.ts","../../../projects/mutator/src/lib/provide-mutator.ts","../../../projects/mutator/src/lib/mutator.ts","../../../projects/mutator/src/foblex-mutator.ts"],"sourcesContent":["import {DeepPartial} from './deep-partial';\n\nexport function deepDelete<T>(target: T, patch: DeepPartial<T>): T {\n  const out: any = Array.isArray(target) ? [...target] : { ...target };\n\n  for (const k in patch) {\n    const pv: any = (patch as any)[k];\n\n    if (pv && typeof pv === 'object' && !Array.isArray(pv)) {\n      if (out[k]) out[k] = deepDelete(out[k], pv);\n    } else {\n      delete out[k];\n    }\n  }\n  return out;\n}\n","import {DeepPartial} from './deep-partial';\n\nexport function deepMerge<T>(target: T, patch: DeepPartial<T>): T {\n  if (typeof target !== 'object' || target === null) return patch as T;\n  if (typeof patch !== 'object' || patch === null) return target;\n\n  const out: any = Array.isArray(target)\n    ? [...target]\n    : { ...target };\n\n  for (const key in patch) {\n    if (!Object.prototype.hasOwnProperty.call(patch, key)) continue;\n\n    const patchValue = patch[key];\n    const targetValue = (target as any)[key];\n\n    if (isPlainObject(patchValue) && isPlainObject(targetValue)) {\n      out[key] = deepMerge(targetValue, patchValue as any);\n    } else {\n      out[key] = patchValue;\n    }\n  }\n\n  return out;\n}\n\nfunction isPlainObject(value: unknown): value is Record<string, any> {\n  return (\n    typeof value === 'object' &&\n    value !== null &&\n    !Array.isArray(value) &&\n    Object.prototype.toString.call(value) === '[object Object]'\n  );\n}\n","import {InjectionToken, Provider} from '@angular/core';\n\nexport interface MutatorConfig {\n  limit?: number;\n}\n\nexport const MUTATOR_CONFIG = new InjectionToken<MutatorConfig>('F_MUTATOR_CONFIG');\n\nexport function provideMutator(config: MutatorConfig = {}): Provider[] {\n  return [\n    {\n      provide: MUTATOR_CONFIG,\n      useValue: config,\n    }\n  ];\n}\n","import {inject, Signal, signal} from '@angular/core';\nimport {deepMerge, deepDelete, DeepPartial} from './utils';\nimport {IMutatorChange} from './i-mutator-change';\nimport {MUTATOR_CONFIG} from './provide-mutator';\n\nfunction deepClone<T>(value: T): T {\n  if (typeof structuredClone === 'function') {\n    return structuredClone(value);\n  }\n  return JSON.parse(JSON.stringify(value));\n}\n\ninterface Changes<T> {\n  value: DeepPartial<T>;\n  action: 'create' | 'update' | 'delete';\n}\n\nexport abstract class Mutator<T extends object> {\n  private _base: T = {} as T;\n  private readonly _undoStack: Changes<T>[] = [];\n  private readonly _redoStack: Changes<T>[] = [];\n\n  private readonly _config = inject(MUTATOR_CONFIG, {optional: true});\n\n  private readonly _limit = this._config?.limit || 50;\n\n  private readonly _change = signal<IMutatorChange>({\n    version: 0,\n    notifier: null\n  });\n\n  private readonly _canUndo = signal(false);\n  private readonly _canRedo = signal(false);\n\n  public get changes(): Signal<IMutatorChange> {\n    return this._change.asReadonly();\n  }\n\n  public get canUndo(): Signal<boolean> {\n    return this._canUndo.asReadonly();\n  }\n\n  public get canRedo(): Signal<boolean> {\n    return this._canRedo.asReadonly();\n  }\n\n  public get base(): T {\n    return deepClone(this._base);\n  }\n\n  public initialize(value: T): void {\n    this._base = value;\n    this._undoStack.length = 0;\n    this._redoStack.length = 0;\n    this._updateSignals();\n    this._change.set({version: 0, notifier: null});\n  }\n\n  public create(patch: DeepPartial<T>, notifier?: string): void {\n    this._addChanges({\n      value: patch,\n      action: 'create'\n    }, notifier || null);\n  }\n\n  public update(patch: DeepPartial<T>, notifier?: string): void {\n    this._addChanges({\n      value: patch,\n      action: 'update'\n    }, notifier || null);\n  }\n\n  public delete(patch: DeepPartial<T>, notifier?: string): void {\n    this._addChanges({\n      value: patch,\n      action: 'delete'\n    }, notifier || null);\n  }\n\n  public _addChanges(changes: Changes<T>, notifier: string | null): void {\n    this._undoStack.push(deepClone(changes));\n\n    if (this._undoStack.length > this._limit) {\n      const oldest = this._undoStack.shift()!;\n      this._base = this._applyChange(this._base, oldest);\n    }\n\n    this._redoStack.length = 0;\n    this._updateSignals();\n\n    this._setChangeObject(notifier);\n  }\n\n  private _setChangeObject(notifier: string | null): void {\n    this._change.set({version: this._change().version + 1, notifier});\n  }\n\n  public getSnapshot(): T {\n    let result: T = deepClone(this._base);\n\n    for (const change of this._undoStack) {\n      result = this._applyChange(result, change);\n    }\n\n    return result;\n  }\n\n  private _applyChange(result: T, change: Changes<T>): T {\n    switch (change.action) {\n      case 'create':\n      case 'update':\n        return deepMerge(result, change.value);\n      case 'delete':\n        return deepDelete(result, change.value);\n      default:\n        throw new Error(`Unknown action: ${change.action}`);\n    }\n  }\n\n  public undo(): void {\n    const last = this._undoStack.pop();\n    if (last) {\n      this._redoStack.push(last);\n      this._updateSignals();\n      this._setChangeObject(null);\n    }\n  }\n\n  public redo(): void {\n    const restored = this._redoStack.pop();\n    if (restored) {\n      this._undoStack.push(restored);\n      this._updateSignals();\n      this._setChangeObject(null);\n    }\n  }\n\n  public patchBase(patch: DeepPartial<T>): void {\n    this._base = deepMerge(this._base, deepClone(patch));\n  }\n\n  public deleteFromBase(patch: DeepPartial<T>): void {\n    this._base = deepDelete(this._base, deepClone(patch));\n  }\n\n  private _updateSignals(): void {\n    this._canUndo.set(this._undoStack.length > 0);\n    this._canRedo.set(this._redoStack.length > 0);\n  }\n}\n","/**\n * Generated bundle index. 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