Added url blocking based on prefix

Author: joknelid

AQWebView.ios.js

@@ -35,6 +35,9 @@ WKWebView.propTypes = {
     bottom: PropTypes.number,
     right: PropTypes.number
   }),
+
+  blockedPrefixes: PropTypes.arrayOf(PropTypes.string),
+  onPrefixBlocked: PropTypes.func,
 };
 
 var AQWebView = requireNativeComponent('AQWebView', WKWebView);

AQWebView/AQWebView.h

@@ -5,6 +5,7 @@
 @property (nonatomic, assign) UIEdgeInsets contentInset;
 @property (nonatomic, assign) BOOL automaticallyAdjustContentInsets;
 @property (nonatomic, copy) NSDictionary *source;
+@property (nonatomic, copy) NSArray<NSString*> *blockedPrefixes;
 
 - (void)reload;
 

AQWebView/AQWebView.m

@@ -10,6 +10,8 @@ @interface AQWebView () <RCTAutoInsetsProtocol, WKNavigationDelegate>
 @property (nonatomic, copy) RCTDirectEventBlock onLoadingStart;
 @property (nonatomic, copy) RCTDirectEventBlock onLoadingFinish;
 @property (nonatomic, copy) RCTDirectEventBlock onLoadingError;
+@property (nonatomic, copy) RCTDirectEventBlock onPrefixBlocked;
+
 @end
 
 @implementation AQWebView
@@ -147,6 +149,35 @@ - (void)refreshContentInset
 
 #pragma mark - WKNavigationDelegate
 
+- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
+{
+  NSURL *url = navigationAction.request.URL;
+  NSString *urlStr = [url absoluteString];
+  BOOL block = false;
+
+  if ([urlStr isEqual: @""]) {
+    urlStr = @"about:blank";
+  }
+
+  for (id prefix in _blockedPrefixes) {
+    if ([urlStr hasPrefix:prefix]) {
+      NSMutableDictionary<NSString *, id> *event = [[NSMutableDictionary alloc] initWithDictionary:
+                                                    @{
+                                                      @"url": urlStr,
+                                                      }
+                                                    ];
+      _onPrefixBlocked(event);
+      decisionHandler(WKNavigationActionPolicyCancel);
+      block = true;
+      break;
+    }
+  }
+
+  if (!block) {
+    decisionHandler(WKNavigationActionPolicyAllow);
+  }
+}
+
 -(void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation
 {
   [_spinner stopAnimating];

AQWebView/AQWebViewManager.m

@@ -22,6 +22,8 @@ - (UIView *) view
 RCT_EXPORT_VIEW_PROPERTY(onLoadingFinish, RCTDirectEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onLoadingError, RCTDirectEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(source, NSDictionary)
+RCT_EXPORT_VIEW_PROPERTY(blockedPrefixes, NSArray<NSString*>)
+RCT_EXPORT_VIEW_PROPERTY(onPrefixBlocked, RCTDirectEventBlock)
 
 RCT_EXPORT_METHOD(reload:(nonnull NSNumber *)reactTag)
 {