[iOS][WidgetKit] Wire actions

- Wires the widget commands to the respective actions
- Logs start action for widget
- Adds TODOs in the places where specific action metrics will go

Bug: 1138719
Change-Id: I2a10d029b0f0b8b1b100cc37b7a93274c939a33c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2511850
Commit-Queue: Javier Flores <javierrobles@chromium.org>
Reviewed-by: Chris Lu <thegreenfrog@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823171}

ios/chrome/app/startup/chrome_app_startup_parameters.mm

@@ -8,6 +8,7 @@
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics.h"
 #include "base/metrics/user_metrics_action.h"
+#include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
 #import "ios/chrome/browser/ui/whats_new/default_browser_utils.h"
@@ -34,6 +35,31 @@ const char kApplicationGroupCommandDelay[] =
 // here due to a Smart App Banner presentation on a Google.com page.
 NSString* const kSmartAppBannerKey = @"safarisab";
 
+// TODO(crbug.com/1138702): When swift is supported move WidgetKit constants to
+// a file where they can be shared with the extension. Currently these are also
+// declared as URLs in ios/c/widget_kit_extension/widget_constants.swift.
+//
+// Scheme used by the widget extension actions. It's important that this scheme
+// is never defined as Custom URL Scheme for Chrome so only the widgets can use
+// the actions on it.
+NSString* const kWidgetKitSchemeChrome = @"chromewidgetkit";
+// Host used to identify Search (small) widget.
+NSString* const kWidgetKitHostSearchWidget = @"search-widget";
+// Host used to identify Quick Actions (medium) widget.
+NSString* const kWidgetKitHostQuickActionsWidget = @"quick-actions-widget";
+// Host used to identify Dino Game (small) widget.
+NSString* const kWidgetKitHostDinoGameWidget = @"dino-game-widget";
+// Path for search action.
+NSString* const kWidgetKitActionSearch = @"/search";
+// Path for incognito action.
+NSString* const kWidgetKitActionIncognito = @"/incognito";
+// Path for Voice Search action.
+NSString* const kWidgetKitActionVoiceSearch = @"/voicesearch";
+// Path for QR Reader action.
+NSString* const kWidgetKitActionQRReader = @"/qrreader";
+// Path for Game action.
+NSString* const kWidgetKitActionGame = @"/game";
+
 const CGFloat kAppGroupTriggersVoiceSearchTimeout = 15.0;
 
 // Values of the UMA Startup.MobileSessionStartAction histogram.
@@ -61,7 +87,8 @@ enum MobileSessionStartAction {
   // browser on iOS 14+ as http openURL calls will be directed to Chrome by the
   // system from all other apps.
   START_ACTION_OPEN_HTTPS_FROM_OS = 8,
-  MOBILE_SESSION_START_ACTION_COUNT,
+  START_ACTION_WIDGET_KIT_COMMAND = 9,
+  MOBILE_SESSION_START_ACTION_COUNT
 };
 
 // Values of the UMA iOS.SearchExtension.Action histogram.
@@ -104,8 +131,47 @@ enum SearchExtensionAction {
   if (!gurl.is_valid() || gurl.scheme().length() == 0)
     return nil;
 
-  // TODO(crbug.com/228098): Temporary fix.
-  if (IsXCallbackURL(gurl)) {
+  if ([completeURL.scheme isEqual:kWidgetKitSchemeChrome]) {
+    UMA_HISTOGRAM_ENUMERATION(kUMAMobileSessionStartActionHistogram,
+                              START_ACTION_WIDGET_KIT_COMMAND,
+                              MOBILE_SESSION_START_ACTION_COUNT);
+
+    const char* command = "";
+    NSString* sourceWidget = completeURL.host;
+
+    if ([completeURL.path isEqual:kWidgetKitActionSearch]) {
+      command = app_group::kChromeAppGroupFocusOmniboxCommand;
+    } else if ([completeURL.path isEqual:kWidgetKitActionIncognito]) {
+      command = app_group::kChromeAppGroupIncognitoSearchCommand;
+    } else if ([completeURL.path isEqual:kWidgetKitActionVoiceSearch]) {
+      command = app_group::kChromeAppGroupVoiceSearchCommand;
+    } else if ([completeURL.path isEqual:kWidgetKitActionQRReader]) {
+      command = app_group::kChromeAppGroupQRScannerCommand;
+    } else if ([completeURL.path isEqual:kWidgetKitActionGame]) {
+      // TODO(crbug.com/1138720): log histogram.
+
+      LogLikelyInterestedDefaultBrowserUserActivity();
+
+      GURL URL(
+          base::StringPrintf("%s://%s", kChromeUIScheme, kChromeUIDinoHost));
+      return
+          [[ChromeAppStartupParameters alloc] initWithExternalURL:URL
+                                                declaredSourceApp:appId
+                                                  secureSourceApp:sourceWidget
+                                                      completeURL:completeURL];
+    }
+
+    NSString* commandString = base::SysUTF8ToNSString(command);
+    return [self newAppStartupParametersForCommand:commandString
+                                  withExternalText:nil
+                                  withExternalData:nil
+                                         withIndex:0
+                                           withURL:nil
+                             fromSourceApplication:appId
+                       fromSecureSourceApplication:sourceWidget];
+
+  } else if (IsXCallbackURL(gurl)) {
+    // TODO(crbug.com/228098): Temporary fix.
     NSString* action = [completeURL path];
     // Currently only "open" and "extension-command" are supported.
     // Other actions are being considered (see b/6914153).
@@ -420,6 +486,12 @@ enum SearchExtensionAction {
     UMA_HISTOGRAM_COUNTS_100("IOS.ContentExtension.Index",
                              [index integerValue]);
   }
+  if ([secureSourceApp isEqualToString:kWidgetKitHostSearchWidget]) {
+    // TODO(crbug.com/1138720): log histogram.
+  }
+  if ([secureSourceApp isEqualToString:kWidgetKitHostQuickActionsWidget]) {
+    // TODO(crbug.com/1138720): log histograms.
+  }
   return params;
 }