@propero/easy-store/dist/index.mjs.map

Simple, intuitive, functional reactive stores for typescript

{"version":3,"sources":["../src/create-accessors.ts","../src/create-get-set.ts","../src/create-patch.ts","../src/create-store-subscribe.ts","../src/create-subscribable.ts","../src/create-store.ts","../src/derive-store.ts"],"sourcesContent":["import type { AccessibleStore, StoreGetter, StoreSetter } from \"src/types\";\n\nexport function createAccessors<T, Val>(\n  obj: Val,\n  get: StoreGetter<T>,\n  set: StoreSetter<T>\n): Val & AccessibleStore<T> {\n  Object.defineProperty(obj, \"value\", {\n    get,\n    set,\n    configurable: true,\n    enumerable: true,\n  });\n  return obj as any;\n}\n","import {\n  NotifyFunction,\n  StoreGetter,\n  StoreSetter,\n  UpdateFunction,\n} from \"src/types\";\n\nexport function createGetSet<T>(\n  initial: T,\n  notify: NotifyFunction<[newVal: T, oldVal?: T]>\n): [get: StoreGetter<T>, set: StoreSetter<T>] {\n  let value: T = initial;\n  let oldValue: T | undefined = undefined;\n\n  return [\n    () => value,\n    function set(newValue: T | UpdateFunction<T>): void | Promise<void> {\n      if (typeof newValue === \"function\")\n        return Promise.resolve((newValue as UpdateFunction<T>)(value)).then(\n          set\n        );\n      oldValue = value;\n      value = newValue;\n      notify(value, oldValue);\n    } as any,\n  ];\n}\n","import {\n  PatchFunction,\n  StoreGetter,\n  StorePatcher,\n  StoreSetter,\n} from \"src/types\";\n\nexport function createPatch<T>(\n  get: StoreGetter<T>,\n  set: StoreSetter<T>\n): StorePatcher<T> {\n  return function patch(\n    partial: Partial<T> | PatchFunction<T>\n  ): void | Promise<void> {\n    if (typeof partial === \"function\")\n      return Promise.resolve((partial as PatchFunction<T>)(get())).then(patch);\n    set({ ...get(), ...partial } as any);\n  } as any;\n}\n","import { StoreGetter, SubscribeFunction } from \"src/types\";\n\nexport function createStoreSubscribe<T>(\n  sub: SubscribeFunction<[newValue: T, oldValue?: T]>,\n  get: StoreGetter<T>,\n  immediatelyNotify?: boolean\n): SubscribeFunction<[newValue: T, oldValue?: T]> {\n  if (!immediatelyNotify) return sub;\n  return function subscribe(listeners) {\n    const fns = Array.isArray(listeners) ? [...listeners] : [listeners];\n    for (const fn of fns) fn(get());\n    return sub(fns);\n  };\n}\n","import type {\n  ArrayOr,\n  Notifiable,\n  Subscribable,\n  SubscribableOptions,\n} from \"src/types\";\n\nconst tooManyListeners = (count: number) =>\n  `Too many listeners registered for subscribable! maximum allowed is ${count}.\nMaybe check if you attached listeners inside of a render function, event handler or loop?\nIn case you need more listeners, try setting the maxListeners option to a higher value.`;\nexport function createSubscribable<T extends unknown[]>({\n  maxListeners = 50,\n}: SubscribableOptions = {}): Subscribable<T> & Notifiable<T> {\n  const listeners: ((...params: T) => void)[] = [];\n\n  function subscribe(listener: ArrayOr<(...params: T) => void>) {\n    const wrapped = Array.isArray(listener) ? [...listener] : [listener];\n    if (listeners.length + wrapped.length > maxListeners)\n      throw Object.assign(new Error(tooManyListeners(maxListeners)), {\n        code: \"TOO_MANY_LISTENERS\",\n      });\n    listeners.push(...wrapped);\n    return () => {\n      for (const listener of wrapped) {\n        const index = listeners.lastIndexOf(listener);\n        if (index !== -1) listeners.splice(index, 1);\n      }\n    };\n  }\n\n  function notify(...params: T) {\n    for (const listener of listeners) listener(...params);\n  }\n\n  return { subscribe, notify };\n}\n","import { createAccessors } from \"src/create-accessors\";\nimport { createGetSet } from \"src/create-get-set\";\nimport { createPatch } from \"src/create-patch\";\nimport { createStoreSubscribe } from \"src/create-store-subscribe\";\nimport { createSubscribable } from \"src/create-subscribable\";\nimport type {\n  AccessibleStore,\n  PatchableStore,\n  ReadonlyStore,\n  StoreOptions,\n  WritableStore,\n} from \"src/types\";\n\nexport function createStore<T>(\n  initialValue: T,\n  { maxListeners, immediatelyNotify }: StoreOptions = {}\n): ReadonlyStore<T> &\n  PatchableStore<T> &\n  WritableStore<T> &\n  AccessibleStore<T> {\n  const { subscribe: sub, notify } = createSubscribable<\n    [newVal: T, oldVal?: T]\n  >({ maxListeners });\n  const [get, set] = createGetSet(initialValue, notify);\n  const patch = createPatch(get, set);\n  const subscribe = createStoreSubscribe(sub, get, immediatelyNotify);\n  return createAccessors({ subscribe, set, get, patch }, get, set);\n}\n","import { createStore } from \"src/create-store\";\nimport {\n  Destroyable,\n  PromiseOr,\n  ReadonlyStore,\n  StoreOptions,\n  StoreValues,\n} from \"src/types\";\n\nexport function deriveStore<\n  T extends ReadonlyStore<any>[] | ReadonlyArray<ReadonlyStore<any>>,\n  R\n>(\n  stores: T,\n  handler: (...values: StoreValues<T>) => R,\n  initial?: R,\n  options?: StoreOptions\n): ReadonlyStore<R> & Destroyable;\nexport function deriveStore<\n  T extends ReadonlyStore<any>[] | ReadonlyArray<ReadonlyStore<any>>,\n  R\n>(\n  stores: T,\n  handler: (...values: StoreValues<T>) => Promise<R>,\n  initial: R,\n  options?: StoreOptions\n): ReadonlyStore<R> & Destroyable;\nexport function deriveStore<\n  T extends ReadonlyStore<any>[] | ReadonlyArray<ReadonlyStore<any>>,\n  R\n>(\n  stores: T,\n  handler: (...values: StoreValues<T>) => PromiseOr<R>,\n  initial?: R,\n  options?: StoreOptions\n): ReadonlyStore<R> & Destroyable {\n  const { get, set, subscribe } = createStore<R>(initial as R, options);\n  const listener = () => {\n    const result = handler(...(stores.map((it) => it.get()) as any));\n    if (\n      result &&\n      typeof result === \"object\" &&\n      \"then\" in result &&\n      typeof result[\"then\"] === \"function\"\n    )\n      result.then(set);\n    else set(result as any);\n  };\n\n  listener();\n  const handles = stores.map((it) => it.subscribe(listener));\n  const destroy = () => handles.forEach((it) => it());\n\n  return { get, subscribe, destroy 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