ontimize-web-ngx
Version:
Ontimize Web framework using Angular 15
207 lines • 26.8 kB
JavaScript
import { EventEmitter } from '@angular/core';
import { Util } from '../../../util/util';
export class OFormCacheClass {
constructor(form) {
this.form = form;
this.initialDataCache = {};
this.valueChangesStack = [];
this._componentsSubscritpions = {};
this.blockCaching = false;
this.initializedCache = false;
this.onCacheStateChanges = new EventEmitter();
this.changedFormControls = [];
}
updateFormDataCache() {
this.formDataCache = this.form.getRegisteredFieldsValues();
}
addChangeToStack(comp) {
const currentValue = comp.getFormControl().value;
this.valueChangesStack.push({
attr: comp.getAttribute(),
value: currentValue
});
this.onCacheStateChanges.emit();
}
registerComponentCaching(comp) {
const attr = comp.getAttribute();
const listenTo = this.form.detectChangesOnBlur ? comp.onValueChange : comp.onChange;
if (!Util.isDefined(listenTo)) {
return;
}
this._componentsSubscritpions[attr] = listenTo.subscribe(() => {
if (this.initializedCache && !this.blockCaching && this.hasComponentChanged(attr, comp)) {
if (this.changedFormControls.indexOf(attr) === -1) {
this.changedFormControls.push(attr);
}
this.updateFormDataCache();
this.addChangeToStack(comp);
}
});
}
getCachedValue(attr) {
if (this.formDataCache && this.formDataCache.hasOwnProperty(attr)) {
return this.formDataCache[attr];
}
return undefined;
}
destroy() {
Object.keys(this._componentsSubscritpions).forEach((attr) => {
const subs = this._componentsSubscritpions[attr];
subs.unsubscribe();
});
this._componentsSubscritpions = {};
this.formDataCache = undefined;
this.changedFormControls = [];
}
removeUndefinedProperties(arg) {
Object.keys(arg).forEach((key) => {
if (arg[key] === undefined) {
delete arg[key];
}
});
return arg;
}
registerCache() {
const initialCache = this.form.getRegisteredFieldsValues();
this.removeUndefinedProperties(initialCache);
this.initializeCache(initialCache);
this.formDataCache = initialCache;
const components = this.form.getComponents();
const self = this;
Object.keys(components).forEach(attr => {
const comp = components[attr];
if (comp.isAutomaticRegistering()) {
self.registerComponentCaching(comp);
}
});
}
initializeCache(val) {
this.initialDataCache = val;
this.valueChangesStack = [];
this.onCacheStateChanges.emit();
this.initializedCache = true;
this.changedFormControls = [];
}
getInitialDataCache() {
return this.initialDataCache;
}
getDataCache() {
return this.formDataCache;
}
restartCache() {
this.formDataCache = undefined;
this.initializeCache({});
this.initializedCache = false;
this.onCacheStateChanges.emit();
}
setCacheSnapshot() {
this.initializeCache(this.getDataCache());
}
undoLastChange() {
const lastElement = this.valueChangesStack[this.valueChangesStack.length - 1];
if (lastElement) {
const lastCacheValue = this.getCacheLastValue(lastElement.attr);
const lastValue = (lastCacheValue !== null) ? lastCacheValue : this.initialDataCache[lastElement.attr];
this.undoComponentValue(lastElement.attr, lastValue);
this.updateFormDataCache();
this.onCacheStateChanges.emit();
}
}
undoComponentValue(attr, val) {
this.blockCaching = true;
const comp = this.form.getFieldReference(attr);
if (comp) {
comp.setValue(val);
}
this.blockCaching = false;
}
hasComponentChanged(attr, comp) {
const currentValue = comp.getFormControl().value;
const cache = this.formDataCache || this.initialDataCache;
return (currentValue !== cache[attr]);
}
getCacheLastValue(attr) {
this.updateChangesStack(attr);
let result = null;
for (let i = this.valueChangesStack.length - 1; i >= 0; i--) {
const current = this.valueChangesStack[i];
if (current.attr === attr) {
result = current.value;
break;
}
}
return result;
}
updateChangesStack(attr) {
let index;
for (let i = this.valueChangesStack.length - 1; i >= 0; i--) {
const current = this.valueChangesStack[i];
if (current.attr === attr) {
index = i;
break;
}
}
if (index !== undefined) {
for (let i = index; i >= 0; i--) {
const prev = this.valueChangesStack[i - 1];
const current = this.valueChangesStack[i];
if (current.attr === attr) {
this.valueChangesStack.splice(i, 1);
if (!prev || prev.attr === attr) {
continue;
}
else {
break;
}
}
}
}
if (this.valueChangesStack.length === 0) {
this.onCacheStateChanges.emit();
}
}
get isCacheStackEmpty() {
return (this.valueChangesStack.length === 0);
}
isInitialStateChanged(ignoreAttrs = []) {
const initialCache = Object.assign({}, this.initialDataCache);
let currentCache;
if (this.formDataCache) {
currentCache = Object.assign({}, this.formDataCache);
this.removeUndefinedProperties(currentCache);
}
else {
return false;
}
let initialKeys = Object.keys(initialCache);
let currentKeys = currentCache ? Object.keys(currentCache) : initialKeys;
if (ignoreAttrs.length) {
initialKeys = initialKeys.filter(key => !ignoreAttrs.includes(key));
currentKeys = currentKeys.filter(key => !ignoreAttrs.includes(key));
ignoreAttrs.forEach(key => delete initialCache[key]);
}
if (currentKeys.length === 0) {
return false;
}
if (initialKeys.length !== currentKeys.length) {
return true;
}
if (ignoreAttrs.length) {
initialKeys = initialKeys.filter(key => !ignoreAttrs.includes(key));
ignoreAttrs.forEach(key => delete initialCache[key]);
}
let res = false;
for (let i = 0, len = initialKeys.length; i < len; i++) {
const key = initialKeys[i];
res = (initialCache[key] !== currentCache[key]);
if (res) {
break;
}
}
return res;
}
getChangedFormControlsAttr() {
return this.changedFormControls;
}
}
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{ EventEmitter } from '@angular/core';\nimport { Subscription } from 'rxjs';\n\nimport { IFormControlComponent } from '../../../interfaces/form-control-component.interface';\nimport { IFormDataComponent } from '../../../interfaces/form-data-component.interface';\nimport { Util } from '../../../util/util';\nimport { OFormBase } from '../o-form-base.class';\n\nexport class OFormCacheClass {\n\n  protected initialDataCache: object = {};\n  protected formDataCache: object;\n  protected valueChangesStack: Array<any> = [];\n  protected _componentsSubscritpions: any = {};\n  protected blockCaching: boolean = false;\n  protected initializedCache: boolean = false;\n\n  onCacheStateChanges: EventEmitter<any> = new EventEmitter<any>();\n\n  protected changedFormControls: string[] = [];\n\n  constructor(protected form: OFormBase) {\n  }\n\n  protected updateFormDataCache() {\n    this.formDataCache = this.form.getRegisteredFieldsValues();\n  }\n\n  protected addChangeToStack(comp: IFormControlComponent) {\n    const currentValue = comp.getFormControl().value;\n    this.valueChangesStack.push({\n      attr: comp.getAttribute(),\n      value: currentValue\n    });\n    this.onCacheStateChanges.emit();\n  }\n\n  protected registerComponentCaching(comp: IFormDataComponent) {\n    const attr = comp.getAttribute();\n    const listenTo = this.form.detectChangesOnBlur ? comp.onValueChange : comp.onChange;\n    if (!Util.isDefined(listenTo)) {\n      return;\n    }\n    this._componentsSubscritpions[attr] = listenTo.subscribe(() => {\n      if (this.initializedCache && !this.blockCaching && this.hasComponentChanged(attr, comp)) {\n        if (this.changedFormControls.indexOf(attr) === -1) {\n          this.changedFormControls.push(attr);\n        }\n        this.updateFormDataCache();\n        this.addChangeToStack(comp);\n      }\n    });\n  }\n\n  getCachedValue(attr: string): any {\n    if (this.formDataCache && this.formDataCache.hasOwnProperty(attr)) {\n      return this.formDataCache[attr];\n    }\n    return undefined;\n  }\n\n  destroy() {\n    Object.keys(this._componentsSubscritpions).forEach((attr) => {\n      const subs: Subscription = this._componentsSubscritpions[attr];\n      subs.unsubscribe();\n    });\n    this._componentsSubscritpions = {};\n    this.formDataCache = undefined;\n    this.changedFormControls = [];\n  }\n\n  protected removeUndefinedProperties(arg: any): any {\n    Object.keys(arg).forEach((key) => {\n      if (arg[key] === undefined) {\n        delete arg[key];\n      }\n    });\n    return arg;\n  }\n\n  registerCache() {\n    const initialCache = this.form.getRegisteredFieldsValues();\n    this.removeUndefinedProperties(initialCache);\n    this.initializeCache(initialCache);\n    this.formDataCache = initialCache;\n\n    const components = this.form.getComponents();\n    const self = this;\n    Object.keys(components).forEach(attr => {\n      const comp: IFormDataComponent = components[attr];\n      if (comp.isAutomaticRegistering()) {\n        self.registerComponentCaching(comp);\n      }\n    });\n  }\n\n  initializeCache(val: any) {\n    this.initialDataCache = val;\n    this.valueChangesStack = [];\n    this.onCacheStateChanges.emit();\n    this.initializedCache = true;\n    this.changedFormControls = [];\n  }\n\n  getInitialDataCache() {\n    return this.initialDataCache;\n  }\n\n  getDataCache() {\n    return this.formDataCache;\n  }\n\n  restartCache() {\n    this.formDataCache = undefined;\n    this.initializeCache({});\n    this.initializedCache = false;\n    this.onCacheStateChanges.emit();\n  }\n\n  setCacheSnapshot() {\n    this.initializeCache(this.getDataCache());\n  }\n\n  undoLastChange() {\n    const lastElement = this.valueChangesStack[this.valueChangesStack.length - 1];\n    if (lastElement) {\n      const lastCacheValue = this.getCacheLastValue(lastElement.attr);\n      const lastValue = (lastCacheValue !== null) ? lastCacheValue : this.initialDataCache[lastElement.attr];\n      this.undoComponentValue(lastElement.attr, lastValue);\n\n      this.updateFormDataCache();\n      this.onCacheStateChanges.emit();\n    }\n  }\n\n  protected undoComponentValue(attr: string, val: any) {\n    this.blockCaching = true;\n    const comp = this.form.getFieldReference(attr);\n    if (comp) {\n      comp.setValue(val);\n    }\n    this.blockCaching = false;\n  }\n\n  protected hasComponentChanged(attr: string, comp: IFormControlComponent): boolean {\n    const currentValue = comp.getFormControl().value;\n    const cache = this.formDataCache || this.initialDataCache;\n    return (currentValue !== cache[attr]);\n  }\n\n  protected getCacheLastValue(attr: string): any {\n    this.updateChangesStack(attr);\n    let result = null;\n    for (let i = this.valueChangesStack.length - 1; i >= 0; i--) {\n      const current = this.valueChangesStack[i];\n      if (current.attr === attr) {\n        result = current.value;\n        break;\n      }\n    }\n    return result;\n  }\n\n  protected updateChangesStack(attr: string) {\n    let index: number;\n    for (let i = this.valueChangesStack.length - 1; i >= 0; i--) {\n      const current = this.valueChangesStack[i];\n      if (current.attr === attr) {\n        index = i;\n        break;\n      }\n    }\n    if (index !== undefined) {\n      for (let i = index; i >= 0; i--) {\n        const prev = this.valueChangesStack[i - 1];\n        const current = this.valueChangesStack[i];\n        if (current.attr === attr) {\n          this.valueChangesStack.splice(i, 1);\n          if (!prev || prev.attr === attr) {\n            continue;\n          } else {\n            break;\n          }\n        }\n      }\n    }\n    if (this.valueChangesStack.length === 0) {\n      this.onCacheStateChanges.emit();\n    }\n  }\n\n  get isCacheStackEmpty(): boolean {\n    return (this.valueChangesStack.length === 0);\n  }\n\n  isInitialStateChanged(ignoreAttrs: string[] = []): boolean {\n    const initialCache = Object.assign({}, this.initialDataCache);\n    let currentCache: object;\n    if (this.formDataCache) {\n      currentCache = Object.assign({}, this.formDataCache);\n      this.removeUndefinedProperties(currentCache);\n    } else {\n      return false;\n    }\n\n    let initialKeys = Object.keys(initialCache);\n    let currentKeys = currentCache ? Object.keys(currentCache) : initialKeys;\n\n    // Remove ignored fields from temporary initial cache data\n    if (ignoreAttrs.length) {\n      initialKeys = initialKeys.filter(key => !ignoreAttrs.includes(key));\n      currentKeys = currentKeys.filter(key => !ignoreAttrs.includes(key));\n      ignoreAttrs.forEach(key => delete initialCache[key]);\n    }\n\n    if (currentKeys.length === 0) {\n      return false;\n    }\n\n    if (initialKeys.length !== currentKeys.length) {\n      return true;\n    }\n    // Remove ignored fields from temporary initial cache data\n    if (ignoreAttrs.length) {\n      initialKeys = initialKeys.filter(key => !ignoreAttrs.includes(key));\n      ignoreAttrs.forEach(key => delete initialCache[key]);\n    }\n\n    let res = false;\n    for (let i = 0, len = initialKeys.length; i < len; i++) {\n      const key = initialKeys[i];\n      // TODO be careful with types comparisions\n      res = (initialCache[key] !== currentCache[key]);\n      if (res) {\n        break;\n      }\n    }\n    return res;\n  }\n\n  getChangedFormControlsAttr(): string[] {\n    return this.changedFormControls;\n  }\n}\n"]}