CB-7286 [BlackBerry10] Use getUserMedia if camera card is unavailable

src/blackberry10/index.js

@@ -27,7 +27,98 @@ var PictureSourceType = {
         DATA_URL: 0,         // Return base64 encoded string
         FILE_URI: 1,         // Return file uri (content://media/external/images/media/2 for Android)
         NATIVE_URI: 2        // Return native uri (eg. asset-library://... for iOS)
-    };
+    },
+    savePath = window.qnx.webplatform.getApplication().getEnv("HOME").replace('/data', '') + '/shared/camera/',
+    invokeAvailable = true;
+
+//check for camera card - it isn't currently availble in work perimeter
+window.qnx.webplatform.getApplication().invocation.queryTargets(
+    {
+        type: 'image/jpeg',
+        action: 'bb.action.CAPTURE',
+        target_type: 'CARD'
+    },
+    function (error, targets) {
+        invokeAvailable = !error && targets && targets instanceof Array &&
+            targets.filter(function (t) { return t.default === 'sys.camera.card' }).length > 0;
+    }
+);
+
+//open a webview with getUserMedia camera card implementation when camera card not available
+function showCameraDialog (done, cancel, fail) {
+    var wv = qnx.webplatform.createWebView(function () {
+        wv.url = 'local:///chrome/camera.html';
+        wv.allowQnxObject = true;
+        wv.allowRpc = true;
+        wv.zOrder = 1;
+        wv.setGeometry(0, 0, screen.width, screen.height);
+        wv.backgroundColor = 0x00000000;
+        wv.active = true;
+        wv.visible = true;
+        wv.on('UserMediaRequest', function (evt, args) {
+            wv.allowUserMedia(JSON.parse(args).id, 'CAMERA_UNIT_REAR');
+        });
+        wv.on('JavaScriptCallback', function (evt, data) {
+            var args = JSON.parse(data).args;
+            if (args[0] === 'org.apache.cordova.camera') {
+                if (args[1] === 'cancel') {
+                    cancel('User canceled');
+                } else if (args[1] === 'error') {
+                    fail(args[2]);
+                } else {
+                    saveImage(args[1], done, fail);
+                }
+                wv.un('JavaScriptCallback', arguments.callee);
+                wv.visible = false;
+                wv.destroy();
+                qnx.webplatform.getApplication().unlockRotation();
+            }
+        });
+        wv.on('Destroyed', function () {
+            wv.delete();
+        });
+        qnx.webplatform.getApplication().lockRotation();
+        qnx.webplatform.getController().dispatchEvent('webview.initialized', [wv]);
+    });
+}
+
+//create unique name for saved file (same pattern as BB10 camera app)
+function imgName() {
+    var date = new Date(),
+        pad = function (n) { return n < 10 ? '0' + n : n };
+    return 'IMG_' + date.getFullYear() + pad(date.getMonth() + 1) + pad(date.getDate()) + '_' +
+            pad(date.getHours()) + pad(date.getMinutes()) + pad(date.getSeconds()) + '.png';
+}
+
+//convert dataURI to Blob
+function dataURItoBlob(dataURI) {
+    var byteString = atob(dataURI.split(',')[1]),
+        mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0],
+        arrayBuffer = new ArrayBuffer(byteString.length),
+        ia = new Uint8Array(arrayBuffer),
+        i;
+    for (i = 0; i < byteString.length; i++) {
+        ia[i] = byteString.charCodeAt(i);
+    }
+    return new Blob([new DataView(arrayBuffer)], { type: mimeString });
+}
+
+//save dataURI to file system and call success with path
+function saveImage(data, success, fail) {
+    var name = savePath + imgName();
+    require('lib/webview').setSandbox(false);
+    window.webkitRequestFileSystem(window.PERSISTENT, 0, function (fs) {
+        fs.root.getFile(name, { create: true }, function (entry) {
+            entry.createWriter(function (writer) {
+                writer.onwriteend = function () {
+                    success(name);
+                };
+                writer.onerror = fail;
+                writer.write(dataURItoBlob(data));
+            });
+        }, fail);
+    }, fail);
+}
 
 function encodeBase64(filePath, callback) {
     var sandbox = window.qnx.webplatform.getController().setFileSystemSandbox, // save original sandbox value
@@ -112,7 +203,11 @@ module.exports = {
 
         switch(sourceType) {
         case PictureSourceType.CAMERA:
-            window.qnx.webplatform.getApplication().cards.camera.open("photo", done, cancel, invoked);
+            if (invokeAvailable) {
+                window.qnx.webplatform.getApplication().cards.camera.open("photo", done, cancel, invoked);
+            } else {
+                showCameraDialog(done, cancel, fail);
+            }
             break;
 
         case PictureSourceType.PHOTOLIBRARY: