Added isUpdateAvailableForInstallation() method to JS module.

#102

src/ios/HCPPlugin.h

@@ -54,4 +54,11 @@
  */
 - (void)jsRequestAppUpdate:(CDVInvokedUrlCommand *)command;
 
+/**
+ *  Check if new version was loaded and can be installed.
+ *
+ *  @param command command with which the method is called
+ */
+- (void)jsIsUpdateAvailableForInstallation:(CDVInvokedUrlCommand *)command;
+
 @end

src/ios/HCPPlugin.m

@@ -751,11 +751,25 @@ - (void)jsRequestAppUpdate:(CDVInvokedUrlCommand *)command {
     [_appUpdateRequestDialog show];
 }
 
+- (void)jsIsUpdateAvailableForInstallation:(CDVInvokedUrlCommand *)command {
+    NSDictionary *data = nil;
+    NSError *error = nil;
+    if (_pluginInternalPrefs.readyForInstallationReleaseVersionName.length) {
+        data = @{@"currentVersion": _pluginInternalPrefs.currentReleaseVersionName,
+                 @"readyToInstallVersion": _pluginInternalPrefs.readyForInstallationReleaseVersionName};
+    } else {
+        error = [NSError errorWithCode:kHCPNothingToInstallErrorCode description:@"Nothing to install"];
+    }
+
+    CDVPluginResult *result = [CDVPluginResult pluginResultWithActionName:nil data:data error:error];
+    [self.commandDelegate sendPluginResult:result callbackId:command.callbackId];
+}
+
 - (void)sendPluginNotReadyToWorkMessageForEvent:(NSString *)eventName callbackID:(NSString *)callbackID {
     NSError *error = [NSError errorWithCode:kHCPAssetsNotYetInstalledErrorCode
                                 description:@"WWW folder from the bundle is not yet installed on the external device. Please, wait for this operation to finish."];
     CDVPluginResult *errorResult = [CDVPluginResult pluginResultWithActionName:eventName
-                                                             applicationConfig:nil
+                                                                          data:nil
                                                                          error:error];
     [self.commandDelegate sendPluginResult:errorResult callbackId:callbackID];
 }

www/chcp.js

@@ -12,7 +12,8 @@ var exec = require('cordova/exec'),
     FETCH_UPDATE: 'jsFetchUpdate',
     INSTALL_UPDATE: 'jsInstallUpdate',
     CONFIGURE: 'jsConfigure',
-    REQUEST_APP_UPDATE: 'jsRequestAppUpdate'
+    REQUEST_APP_UPDATE: 'jsRequestAppUpdate',
+    IS_UPDATE_AVAILABLE_FOR_INSTALLATION: 'jsIsUpdateAvailableForInstallation'
   };
 
 // Called when Cordova is ready for work.
@@ -239,10 +240,22 @@ var chcp = {
   /**
    * Install update if there is anything to install.
    *
-   * @param (Callback(error)) callback - called when native side finishes installation process
+   * @param {Callback(error)} callback - called when native side finishes installation process
    */
   installUpdate: function(callback) {
     callNativeMethod(pluginNativeMethod.INSTALL_UPDATE, null, callback);
+  },
+
+  /**
+   * Check if update was loaded and ready to be installed.
+   * If update was loaded and can be installed - "data" property of the callback will contain the name of the current version and the name of the new
+   * version.
+   * If not - "error" will contain code chcp.error.NOTHING_TO_INSTALL.
+   *
+   * @param {Callback(error, data)} callback - called, when information is retrieved from the native side.
+   */
+  isUpdateAvailableForInstallation: function(callback) {
+    callNativeMethod(pluginNativeMethod.IS_UPDATE_AVAILABLE_FOR_INSTALLATION, null, callback);
   }
 };