1/*
  2 *
  3 * Licensed to the Apache Software Foundation (ASF) under one
  4 * or more contributor license agreements.  See the NOTICE file
  5 * distributed with this work for additional information
  6 * regarding copyright ownership.  The ASF licenses this file
  7 * to you under the Apache License, Version 2.0 (the
  8 * "License"); you may not use this file except in compliance
  9 * with the License.  You may obtain a copy of the License at
 10 *
 11 *   http://www.apache.org/licenses/LICENSE-2.0
 12 *
 13 * Unless required by applicable law or agreed to in writing,
 14 * software distributed under the License is distributed on an
 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 16 * KIND, either express or implied.  See the License for the
 17 * specific language governing permissions and limitations
 18 * under the License.
 19 *
 20*/
 21
 22/* globals qnx, FileError, PluginResult */
 23
 24var PictureSourceType = {
 25        PHOTOLIBRARY : 0,    // Choose image from picture library (same as SAVEDPHOTOALBUM for Android)
 26        CAMERA : 1,          // Take picture from camera
 27        SAVEDPHOTOALBUM : 2  // Choose image from picture library (same as PHOTOLIBRARY for Android)
 28    },
 29    DestinationType = {
 30        DATA_URL: 0,         // Return base64 encoded string
 31        FILE_URI: 1,         // Return file uri (content://media/external/images/media/2 for Android)
 32        NATIVE_URI: 2        // Return native uri (eg. asset-library://... for iOS)
 33    },
 34    savePath = window.qnx.webplatform.getApplication().getEnv("HOME").replace('/data', '') + '/shared/camera/',
 35    invokeAvailable = true;
 36
 37//check for camera card - it isn't currently availble in work perimeter
 38window.qnx.webplatform.getApplication().invocation.queryTargets(
 39    {
 40        type: 'image/jpeg',
 41        action: 'bb.action.CAPTURE',
 42        target_type: 'CARD'
 43    },
 44    function (error, targets) {
 45        invokeAvailable = !error && targets && targets instanceof Array &&
 46            targets.filter(function (t) { return t.default === 'sys.camera.card'; }).length > 0;
 47    }
 48);
 49
 50//open a webview with getUserMedia camera card implementation when camera card not available
 51function showCameraDialog (done, cancel, fail) {
 52    var wv = qnx.webplatform.createWebView(function () {
 53        wv.url = 'local:///chrome/camera.html';
 54        wv.allowQnxObject = true;
 55        wv.allowRpc = true;
 56        wv.zOrder = 1;
 57        wv.setGeometry(0, 0, screen.width, screen.height);
 58        wv.backgroundColor = 0x00000000;
 59        wv.active = true;
 60        wv.visible = true;
 61        wv.on('UserMediaRequest', function (evt, args) {
 62            wv.allowUserMedia(JSON.parse(args).id, 'CAMERA_UNIT_REAR');
 63        });
 64        wv.on('JavaScriptCallback', function (evt, data) {
 65            var args = JSON.parse(data).args;
 66            if (args[0] === 'cordova-plugin-camera') {
 67                if (args[1] === 'cancel') {
 68                    cancel('User canceled');
 69                } else if (args[1] === 'error') {
 70                    fail(args[2]);
 71                } else {
 72                    saveImage(args[1], done, fail);
 73                }
 74                wv.un('JavaScriptCallback', arguments.callee);
 75                wv.visible = false;
 76                wv.destroy();
 77                qnx.webplatform.getApplication().unlockRotation();
 78            }
 79        });
 80        wv.on('Destroyed', function () {
 81            wv.delete();
 82        });
 83        qnx.webplatform.getApplication().lockRotation();
 84        qnx.webplatform.getController().dispatchEvent('webview.initialized', [wv]);
 85    });
 86}
 87
 88//create unique name for saved file (same pattern as BB10 camera app)
 89function imgName() {
 90    var date = new Date(),
 91        pad = function (n) { return n < 10 ? '0' + n : n; };
 92    return 'IMG_' + date.getFullYear() + pad(date.getMonth() + 1) + pad(date.getDate()) + '_' +
 93            pad(date.getHours()) + pad(date.getMinutes()) + pad(date.getSeconds()) + '.png';
 94}
 95
 96//convert dataURI to Blob
 97function dataURItoBlob(dataURI) {
 98    var byteString = atob(dataURI.split(',')[1]),
 99        mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0],
100        arrayBuffer = new ArrayBuffer(byteString.length),
101        ia = new Uint8Array(arrayBuffer),
102        i;
103    for (i = 0; i < byteString.length; i++) {
104        ia[i] = byteString.charCodeAt(i);
105    }
106    return new Blob([new DataView(arrayBuffer)], { type: mimeString });
107}
108
109//save dataURI to file system and call success with path
110function saveImage(data, success, fail) {
111    var name = savePath + imgName();
112    require('lib/webview').setSandbox(false);
113    window.webkitRequestFileSystem(window.PERSISTENT, 0, function (fs) {
114        fs.root.getFile(name, { create: true }, function (entry) {
115            entry.createWriter(function (writer) {
116                writer.onwriteend = function () {
117                    success(name);
118                };
119                writer.onerror = fail;
120                writer.write(dataURItoBlob(data));
121            });
122        }, fail);
123    }, fail);
124}
125
126function encodeBase64(filePath, callback) {
127    var sandbox = window.qnx.webplatform.getController().setFileSystemSandbox, // save original sandbox value
128        errorHandler = function (err) {
129            var msg = "An error occured: ";
130
131            switch (err.code) {
132            case FileError.NOT_FOUND_ERR:
133                msg += "File or directory not found";
134                break;
135
136            case FileError.NOT_READABLE_ERR:
137                msg += "File or directory not readable";
138                break;
139
140            case FileError.PATH_EXISTS_ERR:
141                msg += "File or directory already exists";
142                break;
143
144            case FileError.TYPE_MISMATCH_ERR:
145                msg += "Invalid file type";
146                break;
147
148            default:
149                msg += "Unknown Error";
150                break;
151            }
152
153            // set it back to original value
154            window.qnx.webplatform.getController().setFileSystemSandbox = sandbox;
155            callback(msg);
156        },
157        gotFile = function (fileEntry) {
158            fileEntry.file(function (file) {
159                var reader = new FileReader();
160
161                reader.onloadend = function (e) {
162                    // set it back to original value
163                    window.qnx.webplatform.getController().setFileSystemSandbox = sandbox;
164                    callback(this.result);
165                };
166
167                reader.readAsDataURL(file);
168            }, errorHandler);
169        },
170        onInitFs = function (fs) {
171            window.qnx.webplatform.getController().setFileSystemSandbox = false;
172            fs.root.getFile(filePath, {create: false}, gotFile, errorHandler);
173        };
174
175    window.webkitRequestFileSystem(window.TEMPORARY, 10 * 1024 * 1024, onInitFs, errorHandler); // set size to 10MB max
176}
177
178module.exports = {
179    takePicture: function (success, fail, args, env) {
180        var destinationType = JSON.parse(decodeURIComponent(args[1])),
181            sourceType = JSON.parse(decodeURIComponent(args[2])),
182            result = new PluginResult(args, env),
183            done = function (data) {
184                if (destinationType === DestinationType.FILE_URI) {
185                    data = "file://" + data;
186                    result.callbackOk(data, false);
187                } else {
188                    encodeBase64(data, function (data) {
189                        if (/^data:/.test(data)) {
190                            data = data.slice(data.indexOf(",") + 1);
191                            result.callbackOk(data, false);
192                        } else {
193                            result.callbackError(data, false);
194                        }
195                    });
196                }
197            },
198            cancel = function (reason) {
199                result.callbackError(reason, false);
200            },
201            invoked = function (error) {
202                if (error) {
203                    result.callbackError(error, false);
204                }
205            };
206
207        switch(sourceType) {
208        case PictureSourceType.CAMERA:
209            if (invokeAvailable) {
210                window.qnx.webplatform.getApplication().cards.camera.open("photo", done, cancel, invoked);
211            } else {
212                showCameraDialog(done, cancel, fail);
213            }
214            break;
215
216        case PictureSourceType.PHOTOLIBRARY:
217        case PictureSourceType.SAVEDPHOTOALBUM:
218            window.qnx.webplatform.getApplication().cards.filePicker.open({
219                mode: "Picker",
220                type: ["picture"]
221            }, done, cancel, invoked);
222            break;
223        }
224
225        result.noResult(true);
226    }
227};