keep account selection in state management

src/app/states/accounts.state.ts

@@ -6,11 +6,15 @@ export class AddAccount {
     constructor(public account: AccountInfo) {}
 }
 
+export class SelectAccount {
+    static readonly type = '[Accounts] Select account';
+    constructor(public account: AccountInfo, public multiselection: boolean = false) {}
+}
+
 export interface AccountsStateModel {
     accounts: AccountInfo[];
 }
 
-
 @State<AccountsStateModel>({
     name: 'registeredaccounts',
     defaults: {
@@ -25,10 +29,28 @@ export class AccountsState {
             accounts: [...state.accounts, action.account]
         });
     }
+
+    @Action(SelectAccount)
+    SelectAccount(ctx: StateContext<AccountsStateModel>, action: SelectAccount){
+        const state = ctx.getState();
+        const multiSelection = action.multiselection;
+        const selectedAccount = action.account;
+        const accounts = [...state.accounts];
+        if(!multiSelection) {
+            accounts.forEach(x => x.isSelected = false);
+        }
+        const acc = accounts.find(x => x.username === selectedAccount.username && x.instance === selectedAccount.instance);
+        acc.isSelected = !acc.isSelected;
+
+        ctx.patchState({
+            accounts: accounts
+        });
+    }
 }
 
 export class AccountInfo { 
     username: string;
     instance: string;
     token: TokenData;
+    isSelected: boolean;
 }