Angular CF common Library

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Validators and Utilities This library exposes some services to processs object list; common pipes, directives, validates some standard Indian unique identifiers and helps to detect device being used currently.

Instllation

    npm install cf-common-lib --save-dev

How to use this module?

Include CfCommonModule inside import meta section of NgModule decorator

import { NgModule } from '@angular/core'; 
import { CfCommonModule } from 'cf-common-lib' 
import { AppComponent } from './app.component';
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
     CfCommonModule   // <-Include this one
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

Valitdators for PAN, AADHAAR/VID (virtual ID) , Pincode, GSTIN (Indian)

Import and Include ValidatorService service in component.ts flie

import { ValidatorService} from 'cf-common-lib' ;
@Component({
 //.....
})
export class AppComponent { 
    constructor(private validate: ValidatorService){
        console.log(this.validate.aadhaarCheck('999999999999')) // true
        console.log(this.validate.aadhaarCheck('9999 9999 9999')) // true
        console.log(this.validate.aadhaarCheck('9999 9999 9999 0000')) // true  VID check
        console.log(this.validate.panCheck('bhjka5871m'))  // true
        console.log(this.validate.gstinCheck('29ABCDE1234F2Z5')) // true
        console.log(this.validate.pincodeCheck('560094')) // true
    }

Device detector

Import and Include DeviceDetectorService service in component.ts flie

import {  DeviceDetectorService } from 'cf-common-lib' ;
@Component({
   //.......
})
export class AppComponent {  
    constructor( private device : DeviceDetectorService ){
        console.log(device.info()); 
        /*It prints
        {
            "userAgent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/69.0.3497.81 Chrome/69.0.3497.81 Safari/537.36",
            "browser": "Chrome",
            "device": "",
            "os_version": "Linux x86_64",
            "browser_version": "Chrome 69",
            "isDesktop": true,
            "isMobile": false,
            "isTablet": false
        } 
        */
    }

Utility service

Import and Include UtilityService service in component.ts file.

Now lets see how we can query for objects list.

import { Component } from '@angular/core';
import { UtilityService} from 'cf-common-lib' ;

@Component({
  //.....
})
export class AppComponent { 
  books = [{name  : 'Nyay' , type : 'book' , author :  'Jaimini'},
            {name  : 'satyarth' , type : 'book' , author :  'Dayanand'},
            {name  : 'Sankhya' , type : 'book' , author :  'Kanaad'},
            {name  : 'Triology of vedas' , type : 'book' , author :  'Gurudatt'},
            {name  : 'Yog' , type : 'book' , author :  'Patanjali'}]
            
    _sampleArray = [1,2,3,[4,5,6,7,[8,9,10],11],12] 
    constructor( private utility : UtilityService){  
        console.log(this.utility.extractKeysFromObjectsList(this.books,'name')); 
        /* It extracts keys from Array of objects with keyname 'name'  
            ["Nyay", "satyarth", "Sankhya", "Triology of vedas", "Yog"]  
        */
       //==================================
        console.log(this.utility.findInObjectsArrayFromKey(this.books, 'name', 'yog', true)); // true for  ignoreCase
        /* It finds object from list having key  'name' and value 'yog' 
            {name: "Yog", type: "book", author: "Patanjali"} 
        */
       //================================== 
        console.log( this.utility.objectArrayIndexOf(this.books, 'name', 'Sankhya')); 
        /* It prints index in array of object list having key value 'Sankhya' 
           3 
        */
       //================================== 
        console.log(  this.utility.objectArrayFindFromKey(this.books, 'name', 'Yog')); 
         /*  
          {name: "Yog", type: "book", author: "Patanjali"} 
        */
       //================================== 
        console.log( this.utility.filterInObjectsArrayFromKey(this.books, 'name', 'Sankhya'));
         /* Filters all objects having  key 'name'  and value 'Sankhya'
           [{name: "Sankhya", type: "book", author: "Kanaad"}]  
        */
       //==================================  
        console.log( this.utility.filterObjectsFromKeys(this.books,['Patanjali','Jaimini' ], 'author'));
        /*Filters all objects from list which matches author as key and  list of values ['Patanjali','Jaimini' ]

        [{name: "Nyay", type: "book", author: "Jaimini"},
        {name: "Yog", type: "book", author: "Patanjali"}]
        */
        console.log(this.utility.flattenArray(this._sampleArray));
        /* It flattens nested array  
            [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
        */
    } 

We can do much more complex queries out of above utilities.

Utility service : file injector

This service injects css or js files into index.htmlfile dynamically Callback function gets exceuted on completion of injecting process

import { UtilityService} from 'cf-common-lib' ;
@Component({
 //......
})
export class AppComponent implements OnInit{ 
    filesToInclude =  ['./assets/css/file1.css' , './assets/css/file2.css',
        './assets/js/file1.js', './assets/js/file2.js'];

    constructor( private utility : UtilityService){}
    public _callback(urls) {
		console.log("All URLs are now loaded"); 
	}
	private loadFiles(){ 
        this.utility.jsCssScriptInjector(this._callback, this.filesToInclude);
    }
    ngOnInit(){
        this.loadFiles();
    }
}

Utility service : Objects equality

Checks whether two objects are equal or not (Deep compare).

 //............
 export class AppComponent implements OnInit{  
    obj1 = {a :1 , b :2  , e: {c : 4 , d : 5}}; 
    obj2 = {e: {d : 5 , c : 4}, b :2 , a :1}; 
    constructor(private utility : UtilityService){} 
    console.log(this.utility.isObjectsEqual(this.obj1, this.obj2)); //  Returns true;
}

Usefull common directives. NgxDirectiveModule

• *ngInit This is an alternative option of ng-init in build directives of angularJs which intializes variable on load of DOM.

import { NgxDirectiveModule } from 'cf-common'   
@NgModule({ 
  imports: [
        BrowserModule,  NgxDirectiveModule]  // <--Include this one 
})
export class AppModule { }

use *ngInit in html as below

     <div *ngInit="5+10; let add">  <span>{{add}}</span>  </div>   <!-- Add will be inittialized with 15, expression can be function call as well --> 

• click-stop-propagation Directive to stop default event propogation. In absence of this directive, Event bubbling happens on click with inner click handler.

<div (click)="clickHandler_1()">  click 1
      <div (click)="clickHandler_2()" click-stop-propagation>click 2</div>
  </div>

Usefull common pipes. NgxPipeModule

• lowercase pipe name from class LowerCasePipe which converts text to lowercase.

import { NgxPipeModule } from 'cf-common'   
@NgModule({ 
  imports: [
        BrowserModule,  NgxPipeModule]  // <--Include this one 
})
export class AppModule { }

use lowercase in html as bellow

     <div>{{'CaPiTalFloat' | lowercase}}</div>  
     <!--prints 'capitalfloat'  --> 

• uppercase pipe name from class UpperCasePipe which transforms text to titilecase. use uppercase in html as bellow

     <div>{{'CaPiTalFloat' | uppercase}}</div>  
     <!--prints 'CAPITALFLOAT'  --> 

• titlecase pipe name from class TitleCasePipe which transforms text to titilecase. use titlecase in html as bellow

     <div>{{'CaPiTalFloat' | titlecase}}</div>  
     <!--prints 'Capitalfloat'  --> 

• keys pipe name from class KeysPipe which transforms object to key value.

use keys in html as bellow

items = {name : "satya", value : 3000 }

     <div *ngFor="let item of items | keys ; index as i ;">   
        K : {{item.key}},  V : {{item.value}} 
        <!--K : name, V : satya
            K : value,  V : 3000  --> 
    </div>  

• generateUrl pipe name from class GenerateUrlPipe which replaces {%s%} to specified value in array

import { GenerateUrlPipe } from 'cf-common' ;
//........
let _url = 'https://www.capitalfloat/api/{%s%}/{%s%}/';
constructor(  private generateUrl :  GenerateUrlPipe){
    console.log(this.generateUrl.transform(_url, ['abcd-efgh-ijkl-mnop-1221', 'profile'] ))
    //prints :  https://www.capitalfloat/api/abcd-efgh-ijkl-mnop-1221/profile/
}

• trim pipe name from class TrimPipe which trims value to specified number of charecters as params.

use trim in html as bellow

     <div>{{ 'CaPiTalFloat' | trim :10}}</div>
     <!-- CaPiTalF..  -->

• timeago pipe name from class TimeagoPipe which transforms values to human readable time format.

use timeago in html as bellow

     <div>Updated on :  {{ 1540791632000 | timeago }}</div> 
     <!--  prints:   "4 days ago"   -->

• searchtext pipe name from class SearchtextPipe

appSourceFilter = [{id:1 , label : 'source1' , name : 'name1'}, {id:2 , label : 'source2' , name : 'name2'}, {id:3 , label : 'source3' , name : 'name3'}]

<input  type="text" [(ngModel)]="sourceText" class="formControl"/>
<div *ngFor="let item of appSourceFilter |  searchtext :'id,label,name': sourceText">
		{{item.label}} 
</div>

Above search filter searchtext displays/filters items according to given input values ....it searches on object's keys id , label and name i.e sourceText can be either id , label or name of appSource

• indianCurrency pipe name from class IndianCurrencyPipe which transforms values to human readable time format.

use indianCurrency in html as bellow

     <div>{{ 154079 | indianCurrency }}</div> <!-- Prints  ₹1,54,079  -->
    <div> {{ 154079.29 | indianCurrency }}</div> <!--Prints  ₹1,54,079.29  -->
     

For any suggestions- Write to : [email protected]