gui code improvements

1) all hardcoded URL links moved to constants.ts
2) gui now aware of mainnet/testnet
3) testnet build open up testnet block explorer
4) testnet build is marked with TESTNET note right after version

src/gui/qt-daemon/html_source/src/app/_helpers/directives/transaction-details/transaction-details.component.ts

@@ -3,6 +3,8 @@ import {Transaction} from '../../models/transaction.model';
 import {VariablesService} from '../../services/variables.service';
 import {BackendService} from '../../services/backend.service';
 import {IntToMoneyPipe} from '../../pipes/int-to-money.pipe';
+import {BLOCK_EXPLORER_TX_URL_PREFIX} from '../../../_shared/constants';
+import {BLOCK_EXPLORER_TN_TX_URL_PREFIX} from '../../../_shared/constants';
 
 @Component({
   selector: 'app-transaction-details',
@@ -32,7 +34,7 @@ export class TransactionDetailsComponent implements OnInit, OnDestroy {
   }
 
   openInBrowser(tr) {
-    this.backendService.openUrlInBrowser('explorer.zano.org/transaction/' + tr);
+    this.backendService.openUrlInBrowser((this.variablesService.testnet ? BLOCK_EXPLORER_TN_TX_URL_PREFIX : BLOCK_EXPLORER_TX_URL_PREFIX)+ tr);
   }
 
   ngOnDestroy() {}

src/gui/qt-daemon/html_source/src/app/_helpers/services/backend.service.ts

@@ -645,7 +645,9 @@ export class BackendService {
 
   getVersion(callback) {
     this.runCommand('get_version', {}, (status, version) => {
-      callback(version);
+      this.runCommand('get_network_type', {}, (status, type) => {
+        callback(version, type);
+      });
     });
   }
 

src/gui/qt-daemon/html_source/src/app/_helpers/services/variables.service.ts

@@ -54,6 +54,9 @@ export class VariablesService {
   public count = 40;
   public maxPages = 5;
 
+  public testnet = false;
+  public networkType = '';  // testnet of mainnet
+
   public wallets: Array<Wallet> = [];
   public currentWallet: Wallet;
   public selectWallet: number;

src/gui/qt-daemon/html_source/src/app/_shared/constants.ts

@@ -1,3 +1,10 @@
-export const MIXIN: number = 10;
-export const AUDITABLE_WALLET_HELP_PAGE: string = 'docs.zano.org/docs/auditable-wallets';
-export const RCV_ADDR_QR_SCALE: number = 2;
+export const MIXIN: number                            = 10; // default mixin value
+export const RCV_ADDR_QR_SCALE: number                = 2;  // scale factor for QR code
+
+export const AUDITABLE_WALLET_HELP_PAGE: string       = 'docs.zano.org/docs/auditable-wallets';
+export const CREATE_NEW_WALLET_HELP_PAGE: string      = 'docs.zano.org/docs/getting-started-1#section-create-new-wallet';
+export const LOCKED_BALANCE_HELP_PAGE: string         = 'docs.zano.org/docs/locked-balance';
+export const DOWNLOADS_PAGE_URL: string               = 'zano.org/downloads.html';
+
+export const BLOCK_EXPLORER_TX_URL_PREFIX: string     = 'explorer.zano.org/transaction/';
+export const BLOCK_EXPLORER_TN_TX_URL_PREFIX: string  = 'testnet-explorer.zano.org/transaction/';

src/gui/qt-daemon/html_source/src/app/login/login.component.ts

@@ -5,6 +5,7 @@ import {BackendService} from '../_helpers/services/backend.service';
 import {VariablesService} from '../_helpers/services/variables.service';
 import {ModalService} from '../_helpers/services/modal.service';
 import {Wallet} from '../_helpers/models/wallet.model';
+import {DOWNLOADS_PAGE_URL} from '../_shared/constants'
 
 import icons from '../../assets/icons/icons.json';
 
@@ -234,7 +235,7 @@ export class LoginComponent implements OnInit, OnDestroy {
   }
 
   getUpdate() {
-    this.backend.openUrlInBrowser('zano.org/downloads.html');
+    this.backend.openUrlInBrowser(DOWNLOADS_PAGE_URL);
   }
 
   ngOnDestroy() {

src/gui/qt-daemon/html_source/src/app/main/main.component.ts

@@ -4,6 +4,7 @@ import {BackendService} from '../_helpers/services/backend.service';
 import {VariablesService} from '../_helpers/services/variables.service';
 import {ActivatedRoute, Router} from '@angular/router';
 import {TranslateService} from '@ngx-translate/core';
+import {CREATE_NEW_WALLET_HELP_PAGE} from '../_shared/constants';
 
 @Component({
   selector: 'app-main',
@@ -45,7 +46,7 @@ export class MainComponent implements OnInit {
   }
 
   openInBrowser() {
-    this.backend.openUrlInBrowser('docs.zano.org/docs/getting-started-1#section-create-new-wallet');
+    this.backend.openUrlInBrowser(CREATE_NEW_WALLET_HELP_PAGE);
   }
 
   back() {

src/gui/qt-daemon/html_source/src/app/settings/settings.component.ts

@@ -122,9 +122,16 @@ export class SettingsComponent implements OnInit {
   }
 
   ngOnInit() {
-    this.backend.getVersion((version) => {
+    this.backend.getVersion((version, type) => {
       this.ngZone.run(() => {
         this.currentBuild = version;
+        this.variablesService.testnet = false;
+        if (type == 'testnet')
+        {
+          this.currentBuild += ' TESTNET';
+          this.variablesService.testnet = true;
+        }
+        this.variablesService.networkType = type;
       });
     });
   }

src/gui/qt-daemon/html_source/src/app/sidebar/sidebar.component.ts

@@ -4,6 +4,7 @@ import {VariablesService} from '../_helpers/services/variables.service';
 import {BackendService} from '../_helpers/services/backend.service';
 import { ModalService } from '../_helpers/services/modal.service';
 import {AUDITABLE_WALLET_HELP_PAGE} from '../_shared/constants';
+import {DOWNLOADS_PAGE_URL} from '../_shared/constants';
 
 import icons from '../../assets/icons/icons.json';
 
@@ -121,7 +122,7 @@ export class SidebarComponent implements OnInit, OnDestroy {
   }
 
   getUpdate() {
-    this.backend.openUrlInBrowser('zano.org/downloads.html');
+    this.backend.openUrlInBrowser(DOWNLOADS_PAGE_URL);
   }
   goToAuditableWalletHelpPage(e) {
     e.preventDefault();

src/gui/qt-daemon/html_source/src/app/wallet/wallet.component.ts

@@ -5,6 +5,7 @@ import { BackendService } from '../_helpers/services/backend.service';
 import { TranslateService } from '@ngx-translate/core';
 import { IntToMoneyPipe } from '../_helpers/pipes/int-to-money.pipe';
 import { Subscription } from 'rxjs';
+import { LOCKED_BALANCE_HELP_PAGE } from '../_shared/constants';
 
 import icons from '../../assets/icons/icons.json';
 import { PaginationService } from '../_helpers/services/pagination.service';
@@ -177,7 +178,7 @@ export class WalletComponent implements OnInit, OnDestroy {
     link.setAttribute('class', 'link');
     link.innerHTML = this.translate.instant('WALLET.LOCKED_BALANCE_LINK');
     link.addEventListener('click', () => {
-      this.openInBrowser('docs.zano.org/docs/locked-balance');
+      this.openInBrowser(LOCKED_BALANCE_HELP_PAGE);
     });
     this.balanceTooltip.appendChild(link);
     return this.balanceTooltip;