all files / documents/document/internal/ state.js

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import Ember from 'ember';
 
const {
  assign
} = Ember;
 
const defaults = {
  isNew: false,
  isLoading: false,
  isLoaded: false,
  isDirty: false,
  isSaving: false,
  isDeleted: false,
  isError: false,
  error: null
};
 
export const keys = Object.keys(defaults);
 
export default class State {
 
  constructor() {
    assign(this, defaults);
  }
 
  set(props, changed) {
    let any = false;
    for(let key in props) {
      let value = props[key];
      if(this[key] !== value) {
        this[key] = value;
        changed(key);
        any = true;
      }
    }
    if(any) {
      changed('state');
    }
  }
 
  get() {
    return keys.reduce((obj, key) => {
      obj[key] = this[key];
      return obj;
    }, {});
  }
 
  onDirty(changed) {
    this.set({ isDirty: true }, changed);
  }
 
  onLoading(changed) {
    this.set({
      isLoading: true,
      isError: false,
      error: null
    }, changed);
  }
 
  onLoaded(changed) {
    this.set({
      isNew: false,
      isLoading: false,
      isLoaded: true,
      isDirty: false,
      isSaving: false,
      isDeleted: false,
      isError: false,
      error: null
    }, changed);
  }
 
  onSaving(changed) {
    this.set({
      isSaving: true,
      isError: false,
      error: null
    }, changed);
  }
 
  onSaved(changed) {
    this.set({
      isNew: false,
      isLoading: false,
      isLoaded: true,
      isDirty: false,
      isSaving: false,
      isDeleted: false,
      isError: false,
      error: null
    }, changed);
  }
 
  onDeleting(changed) {
    this.onSaving(changed);
  }
 
  onDeleted(changed) {
    this.set({
      isNew: false,
      isLoading: false,
      isLoaded: true,
      isDirty: false,
      isSaving: false,
      isDeleted: true,
      isError: false,
      error: null
    }, changed);
  }
 
  onError(error, changed) {
    this.set({
      isLoading: false,
      isSaving: false,
      isError: true,
      error
    }, changed);
  }
 
}