taskbuffer/ts/taskbuffer.classes.helpers.ts

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import plugins = require('./taskbuffer.plugins');
import { Task, ITaskFunction } from './taskbuffer.classes.task'
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export let emptyTaskFunction: ITaskFunction = function (x) {
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let done = plugins.q.defer()
done.resolve()
return done.promise
}
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export let isTask = function (taskArg: Task): boolean {
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if (
taskArg instanceof Task
&& typeof taskArg.taskFunction === 'function'
) {
return true
} else {
return false
}
}
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export let isTaskTouched = (taskArg: Task, touchedTasksArray: Task[]): boolean => {
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let result = false
for (let keyArg in touchedTasksArray) {
if (taskArg === touchedTasksArray[ keyArg ]) {
result = true
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}
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}
return result
}
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export let runTask = function (taskArg: Task, optionsArg: { x?, touchedTasksArray?: Task[] }) {
let done = plugins.q.defer()
// set running params
taskArg.running = true
done.promise.then(function () { taskArg.running = false })
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// handle options
let options = plugins.lodash.merge(
{ x: undefined, touchedTasksArray: [] },
optionsArg
)
let x = options.x
let touchedTasksArray: Task[] = options.touchedTasksArray
touchedTasksArray.push(taskArg)
// run the task cascade
let localDeferred = plugins.q.defer()
localDeferred.promise
.then(() => {
if (taskArg.preTask && !isTaskTouched(taskArg.preTask, touchedTasksArray)) {
return runTask(taskArg.preTask, { x: x, touchedTasksArray: touchedTasksArray })
} else {
let done2 = plugins.q.defer()
done2.resolve(x)
return done2.promise
}
})
.then(x => {
return taskArg.taskFunction(x)
})
.then(x => {
if (taskArg.afterTask && !isTaskTouched(taskArg.afterTask, touchedTasksArray)) {
return runTask(taskArg.afterTask, { x: x, touchedTasksArray: touchedTasksArray })
} else {
let done2 = plugins.q.defer()
done2.resolve(x)
return done2.promise
}
})
.then(x => {
done.resolve(x)
}).catch((err) => {
console.log(err)
})
localDeferred.resolve()
return done.promise
}
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export interface cycleObject {
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cycleCounter: number,
deferred: plugins.q.Deferred<any>
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}
export class CycleCounter {
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task: Task
cycleObjectArray: cycleObject[] = []
constructor(taskArg: Task) {
this.task = taskArg
};
getPromiseForCycle(cycleCountArg: number) {
let done = plugins.q.defer()
let cycleObject: cycleObject = {
cycleCounter: cycleCountArg,
deferred: done
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}
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this.cycleObjectArray.push(cycleObject)
return done.promise
};
informOfCycle(x) {
let newCycleObjectArray: cycleObject[] = []
this.cycleObjectArray.forEach(cycleObjectArg => {
cycleObjectArg.cycleCounter--
if (cycleObjectArg.cycleCounter <= 0) {
cycleObjectArg.deferred.resolve(x)
} else {
newCycleObjectArray.push(cycleObjectArg)
};
})
this.cycleObjectArray = newCycleObjectArray
}
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}
export class BufferRunner {
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task: Task
// initialze by default
bufferCounter: number = 0
bufferMax: number = 1
running: boolean = false
constructor(taskArg: Task) {
this.task = taskArg
};
private _run(x) {
let recursiveBufferRunner = (x) => {
if (this.bufferCounter >= 0) {
this.running = true
this.task.running = true
runTask(this.task, { x: x })
.then((x) => {
this.bufferCounter--
this.task.cycleCounter.informOfCycle(x)
recursiveBufferRunner(x)
})
} else {
this.running = false
this.task.running = false
}
}
recursiveBufferRunner(x)
};
setBufferMax(bufferMaxArg: number) {
this.bufferMax = bufferMaxArg
};
trigger(x): Promise<any> {
if (!(this.bufferCounter >= this.bufferMax)) {
this.bufferCounter++
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};
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let returnPromise: Promise<any> = this.task.cycleCounter.getPromiseForCycle(this.bufferCounter + 1)
if (!this.running) {
this._run(x)
}
return returnPromise
};
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};