ngx-diagrams
Version:
> Light Weight, Modular, Typed Diagram Engine for Angular
88 lines • 10.5 kB
JavaScript
import { BehaviorSubject } from 'rxjs';
import { distinctUntilChanged, map } from 'rxjs/operators';
import { isArray, mapToEntries } from '../utils';
export class ValueState {
constructor(value, operator) {
this.stream$ = new BehaviorSubject(value);
this.value$ = operator ? this.stream$.pipe(operator) : this.stream$.asObservable();
}
get value() {
return this.stream$.getValue();
}
set(value) {
this.stream$.next(value);
return this;
}
emit() {
this.stream$.next(this.value);
}
select(project) {
const mapFn = project || ((v) => v);
return this.value$.pipe(map((value) => mapFn(value)), distinctUntilChanged());
}
}
export function createValueState(value, operator) {
return new ValueState(value, operator);
}
export class EntityState extends ValueState {
constructor(value, entityPipe) {
super(value, entityPipe);
}
destroy() {
this.clear();
this.stream$ = null;
this.value$ = null;
}
clear(destroy = true) {
if (destroy) {
this.forEach((entity) => entity.destroy());
}
this.value.clear();
return this;
}
get(id) {
return this.value.get(id);
}
has(id) {
return this.value.has(id);
}
add(entity) {
this.value.set(entity.id, entity);
return this;
}
addMany(entities) {
for (const entity of entities) {
this.add(entity);
}
return this;
}
remove(id, destroy = true) {
var _a;
if (destroy) {
(_a = this.value.get(id)) === null || _a === void 0 ? void 0 : _a.destroy();
}
this.value.delete(id);
return this;
}
array() {
return Array.from(this.value.values());
}
array$() {
return this.select((value) => Array.from(value.values()));
}
forEach(cb) {
this.value.forEach(cb);
}
map(cb) {
return this.array().map(cb);
}
}
export function createEntityState(value = [], entityPipe) {
if (isArray(value)) {
return new EntityState(new Map(value), entityPipe);
}
else {
return new EntityState(new Map(mapToEntries(value)), entityPipe);
}
}
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this.stream$.pipe(operator) : this.stream$.asObservable();\n  }\n\n  get value(): T {\n    return this.stream$.getValue();\n  }\n\n  set(value: T): ValueState<T> {\n    this.stream$.next(value);\n    return this;\n  }\n\n  emit(): void {\n    this.stream$.next(this.value);\n  }\n\n  select(): Observable<T>;\n  select(project: (value: T) => T): Observable<T>;\n  select<R>(project: (value: T) => R): Observable<R>;\n  select<R>(project?: ((value: T) => T) | ((value: T) => R)): Observable<T | R> {\n    const mapFn = project || ((v) => v);\n    return this.value$.pipe(\n      map((value) => mapFn(value)),\n      distinctUntilChanged()\n    );\n  }\n}\n\nexport function createValueState<T>(value: T, operator?: OperatorFunction<any, any>): ValueState<T> {\n  return new ValueState<T>(value, operator);\n}\n\nexport class EntityState<T extends BaseEntity> extends ValueState<EntityMap<T>> {\n  protected stream$: BehaviorSubject<EntityMap<T>>;\n\n  value$: Observable<EntityMap<T>>;\n\n  constructor(value?: EntityMap<T>, entityPipe?: MonoTypeOperatorFunction<EntityMap<T>>) {\n    super(value, entityPipe);\n  }\n\n  destroy() {\n    this.clear();\n    this.stream$ = null;\n    this.value$ = null;\n  }\n\n  clear(destroy = true) {\n    if (destroy) {\n      this.forEach((entity) => entity.destroy());\n    }\n\n    this.value.clear();\n    return this;\n  }\n\n  get(id: ID): T {\n    return this.value.get(id);\n  }\n\n  has(id: ID): boolean {\n    return this.value.has(id);\n  }\n\n  add(entity: T): EntityState<T> {\n    this.value.set(entity.id, entity);\n    return this;\n  }\n\n  addMany(entities: T[]): EntityState<T> {\n    for (const entity of entities) {\n      this.add(entity);\n    }\n    return this;\n  }\n\n  remove(id: ID, destroy = true): EntityState<T> {\n    if (destroy) {\n      this.value.get(id)?.destroy();\n    }\n\n    this.value.delete(id);\n    return this;\n  }\n\n  array(): T[] {\n    return Array.from(this.value.values());\n  }\n\n  array$(): Observable<T[]> {\n    return this.select((value) => Array.from(value.values()));\n  }\n\n  forEach(cb: (value: T, key: string, map: EntityMap<T>) => void): void {\n    this.value.forEach(cb);\n  }\n\n  map<R = any>(cb: (value: T, index: number, array: T[]) => R): R[] {\n    return this.array().map(cb);\n  }\n}\n\nexport function createEntityState<T extends BaseEntity>(\n  value: HashMap<T> | Entries<T> = [],\n  entityPipe: MonoTypeOperatorFunction<Map<ID, T>>\n): EntityState<T> {\n  if (isArray(value)) {\n    return new EntityState(new Map(value), entityPipe);\n  } else {\n    return new EntityState(new Map(mapToEntries(value)), entityPipe);\n  }\n}\n"]}