ng-devui
Version:
DevUI components based on Angular
93 lines • 12.1 kB
JavaScript
export class EventBus {
constructor() {
this.eventBusCore = [];
}
areFuncEqual(a, b) {
return a.toString() === b.toString();
}
isKeyValueObjInArr(arr, key, val) {
const filteredArr = arr.filter((entry) => {
return entry[key] === val;
});
return filteredArr.length > 0;
}
removeFuncInFuncArr(arr, fn) {
for (let z = 0; z < arr.length; z++) {
if (this.areFuncEqual(arr[z], fn)) {
arr.splice(z, 1);
}
}
return arr;
}
getKeyValueObjInArr(arr, key, val) {
const filteredArr = arr.filter((entry) => {
return entry[key] === val;
});
return filteredArr[0];
}
addEvent(eventName, eventFunc) {
if (!this.isKeyValueObjInArr(this.eventBusCore, 'eventName', eventName)) {
this.eventBusCore.push({ eventName: eventName, eventFuncArr: [eventFunc] });
}
else {
this.eventBusCore = this.eventBusCore.map((event) => {
if (event.eventName === eventName) {
event.eventFuncArr.push(eventFunc);
}
return event;
});
}
}
add(...rest) {
const eventName = rest[0];
const callbacks = rest[1];
if (!eventName) {
return;
}
if (typeof callbacks === 'function') {
for (let i = 1; i < rest.length; i++) {
this.addEvent(eventName, rest[i]);
}
}
if (typeof callbacks === 'object' && callbacks.forEach) {
callbacks.forEach((fn) => {
this.addEvent(eventName, fn);
});
}
}
remove(...rest) {
const eventName = rest[0];
const callbacks = rest[1];
if (!eventName) {
return;
}
for (let i = 0; i < this.eventBusCore.length; i++) {
if (this.eventBusCore[i].eventName === eventName) {
if (rest.length === 1) {
return this.eventBusCore.splice(i, 1);
}
const removedEvent = this.eventBusCore.splice(i, 1)[0];
if (typeof callbacks === 'function') {
for (let k = 1; k < rest.length; k++) {
removedEvent.eventFuncArr = this.removeFuncInFuncArr(removedEvent.eventFuncArr, rest[k]);
}
}
if (typeof callbacks === 'object' && callbacks.length) {
for (let x = 0; x < callbacks.length; x++) {
removedEvent.eventFuncArr = this.removeFuncInFuncArr(removedEvent.eventFuncArr, callbacks[x]);
}
}
this.eventBusCore.push(removedEvent);
}
}
}
trigger(eventName, data) {
const event = this.getKeyValueObjInArr(this.eventBusCore, 'eventName', eventName);
if (event) {
(event.eventFuncArr || []).forEach((fn) => {
fn.apply(this, data);
});
}
}
}
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z < arr.length; z++) {\r\n      if (this.areFuncEqual(arr[z], fn)) {\r\n        arr.splice(z, 1);\r\n      }\r\n    }\r\n    return arr;\r\n  }\r\n\r\n  private getKeyValueObjInArr(arr, key, val) {\r\n    const filteredArr = arr.filter((entry) => {\r\n      return entry[key] === val;\r\n    });\r\n    return filteredArr[0];\r\n  }\r\n\r\n  private addEvent(eventName, eventFunc) {\r\n    if (!this.isKeyValueObjInArr(this.eventBusCore, 'eventName', eventName)) {\r\n      this.eventBusCore.push({ eventName: eventName, eventFuncArr: [eventFunc] });\r\n    } else {\r\n      this.eventBusCore = this.eventBusCore.map((event) => {\r\n        if (event.eventName === eventName) {\r\n          event.eventFuncArr.push(eventFunc);\r\n        }\r\n        return event;\r\n      });\r\n    }\r\n  }\r\n\r\n  public add(...rest): void {\r\n    const eventName = rest[0];\r\n    const callbacks = rest[1];\r\n    if (!eventName) {\r\n      return;\r\n    }\r\n    if (typeof callbacks === 'function') {\r\n      for (let i = 1; i < rest.length; i++) {\r\n        this.addEvent(eventName, rest[i]);\r\n      }\r\n    }\r\n    if (typeof callbacks === 'object' && callbacks.forEach) {\r\n      callbacks.forEach((fn) => {\r\n        this.addEvent(eventName, fn);\r\n      });\r\n    }\r\n  }\r\n\r\n  public remove(...rest): any[] {\r\n    const eventName = rest[0];\r\n    const callbacks = rest[1];\r\n    if (!eventName) {\r\n      return;\r\n    }\r\n    for (let i = 0; i < this.eventBusCore.length; i++) {\r\n      if (this.eventBusCore[i].eventName === eventName) {\r\n        if (rest.length === 1) {\r\n          return this.eventBusCore.splice(i, 1);\r\n        }\r\n        const removedEvent = this.eventBusCore.splice(i, 1)[0];\r\n        if (typeof callbacks === 'function') {\r\n          for (let k = 1; k < rest.length; k++) {\r\n            removedEvent.eventFuncArr = this.removeFuncInFuncArr(removedEvent.eventFuncArr, rest[k]);\r\n          }\r\n        }\r\n        if (typeof callbacks === 'object' && callbacks.length) {\r\n          for (let x = 0; x < callbacks.length; x++) {\r\n            removedEvent.eventFuncArr = this.removeFuncInFuncArr(removedEvent.eventFuncArr, callbacks[x]);\r\n          }\r\n        }\r\n        this.eventBusCore.push(removedEvent);\r\n      }\r\n    }\r\n  }\r\n\r\n  public trigger(eventName, data) {\r\n    const event = this.getKeyValueObjInArr(this.eventBusCore, 'eventName', eventName);\r\n    if (event) {\r\n      (event.eventFuncArr || []).forEach((fn) => {\r\n        fn.apply(this, data);\r\n      });\r\n    }\r\n  }\r\n}\r\n"]}