add synchro

src/app/services/object-query.service.ts

@@ -0,0 +1,60 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ObjectQueryService {
+
+  data : any[] = []
+  save: Function = () =>{}
+  
+  constructor() {}
+
+  Update(select:Function, update:Function, data: any[] = this.data ) {
+    
+    let changes = 0
+
+    data.forEach((e)=> {
+      if(select(e)) {
+        changes++
+        update(e)
+      }  
+      
+    })
+
+    if(changes != 0) {
+      this.save()
+    }
+  }
+  
+  select(select:Function, data: any[] = this.data ) {
+    return data.filter((e)=>{
+      return select(e)
+    })
+  }
+  
+  Delete(select:Function, data: any[] = this.data) {
+
+    let changes = 0
+
+    data.forEach((e, index)=>{
+      if(select(e)) {
+        if (index > -1) {
+          changes++
+          data.splice(index, 1);
+        }
+      }
+    })
+
+    if(changes != 0) this.save()
+  }
+
+  Insert(inert:any, data: any[] = this.data ) {
+    data.push(inert)
+  }
+
+  print() {
+    console.log(this.data)
+  }
+  
+}