fixed

src/app/views/home/home.component.ts

@@ -2,7 +2,7 @@ import {Component} from "@angular/core";
 import {Observable, timer} from "rxjs";
 import {map, take} from "rxjs/operators";
 import {Router} from "@angular/router";
-import {SyncService} from "../map/sync.service";
+import {SyncService} from "../../services/sync.service";
 
 const chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
 

src/app/views/map/sync.service.ts

@@ -1,24 +0,0 @@
-import {Injectable} from "@angular/core";
-import {AngularFirestore, AngularFirestoreCollection, DocumentSnapshot} from "@angular/fire/firestore";
-import {map} from "rxjs/operators";
-
-@Injectable({
-    providedIn: 'root'
-})
-export class SyncService {
-    private collection: AngularFirestoreCollection;
-
-    constructor(private db: AngularFirestore) {
-        this.collection = this.db.collection('Maps');
-    }
-
-    async exists(mapCode: string) {
-        return (await this.collection.doc(mapCode).ref.get()).exists;
-    }
-
-    load(mapCode: string) {
-        return this.collection.doc(mapCode).snapshotChanges().pipe(map((snap: any) => {
-            return Object.assign({}, snap.data, {delete: snap.ref.delete, set: snap.ref.set, update: snap.ref.update});
-        }))
-    }
-}