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src/app/services/functions/time.service.ts

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+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class TimeService {
+
+  constructor() { }
+
+  showDateDuration(start:any){
+    let end;
+    end = new Date();
+    start = new Date(start);
+    let customizedDate;
+
+    const totalSeconds     = Math.floor((end - (start))/1000);;
+    const totalMinutes     = Math.floor(totalSeconds/60);
+    const totalHours       = Math.floor(totalMinutes/60);
+    const totalDays        = Math.floor(totalHours/24);
+
+    const hours   = totalHours - ( totalDays * 24 );
+    const minutes = totalMinutes - ( totalDays * 24 * 60 ) - ( hours * 60 );
+    const seconds = totalSeconds - ( totalDays * 24 * 60 * 60 ) - ( hours * 60 * 60 ) - ( minutes * 60 );
+
+    if(totalDays == 0){
+      if(start.getDate() == new Date().getDate()){
+        let time = start.getHours() + ":" + this.addZero(start.getUTCMinutes());
+        return time;
+      }
+      else{
+        return 'Ontem';
+      }
+    }
+    else{
+      let date = start.getDate() + "/" + (start.getMonth()+1) + "/" + start.getFullYear();
+      return date;
+    }
+  }
+
+  addZero(i) {
+    if (i < 10) {
+      i = "0" + i;
+    }
+    return i;
+  }
+
+}