Add iOS native helper: [IBGPlugin setColorTheme]

Author: AliAbdelfattah

src/ios/IBGPlugin.m

@@ -1075,7 +1075,7 @@ - (void) setWelcomeMessageMode:(NSString*)welcomeMessageMode
  * @param {NSString*} theme
  *        NSString representation of color theme
  */
-- (void) setColorTheme:(NSString*)theme
+- (void) setColorThemeInOptions:(NSString*)theme
 {
     if ([theme isEqualToString:@"dark"]) {
         [Instabug setColorTheme:IBGColorThemeDark];
@@ -1084,6 +1084,36 @@ - (void) setColorTheme:(NSString*)theme
     }
 }
 
+/**
+ * Sets the SDK color theme
+ *
+ * @param {CDVInvokedUrlCommand*} command
+ *        The command sent from JavaScript
+ */
+- (void) setColorTheme:(CDVInvokedUrlCommand*)command
+{
+    CDVPluginResult* result;
+    NSString* theme = [command argumentAtIndex:0];
+
+    if ([theme length] > 0) {
+        if ([theme isEqualToString:@"dark"]) {
+            [Instabug setColorTheme:IBGColorThemeDark];
+            result = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK];
+        } else if ([theme isEqualToString:@"light"]) {
+            [Instabug setColorTheme:IBGColorThemeLight];
+            result = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK];
+        } else {
+            result = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR
+                                   messageAsString:@"Color theme value is not valid."];
+        }
+    } else {
+        result = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR
+                                   messageAsString:@"Color theme must be provided."];
+    }
+
+    [self.commandDelegate sendPluginResult:result callbackId:[command callbackId]];
+}
+
 /**
  * Sets a threshold for numbers of sessions and another for number of days
  * required before a survey, that has been dismissed once, would show again.
@@ -1244,7 +1274,7 @@ - (void) applyOptions:(NSDictionary*)options
     [self setTrackingUserStepsEnabled:[[options objectForKey:@"enableTrackingUserSteps"] stringValue]];
     [self setPushNotificationsEnabled:[[options objectForKey:@"enablePushNotifications"] stringValue]];
     [self setSessionProfilerEnabled:[[options objectForKey:@"enableSessionProfiler"] stringValue]];
-    [self setColorTheme:[options objectForKey:@"colorTheme"]];
+    [self setColorThemeInOptions:[options objectForKey:@"colorTheme"]];
     [self setWelcomeMessageMode:[options objectForKey:@"welcomeMessageMode"]];
 }