Merge pull request #2524 from Kedlub/backswipe

[backswipe] New app

apps/backswipe/ChangeLog

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+0.01: New App!

apps/backswipe/boot.js

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+(function () {
+  var DEFAULTS = {
+    mode: 0,
+    apps: [],
+  };
+  var settings = require("Storage").readJSON("backswipe.json", 1) || DEFAULTS;
+
+  // Overrride the default setUI method, so we can save the back button callback
+  var setUI = Bangle.setUI;
+  Bangle.setUI = function (mode, cb) {
+    var options = {};
+    if ("object"==typeof mode) {
+      options = mode;
+    }
+
+    var currentFile = global.__FILE__ || "";
+
+    if(global.BACK) delete global.BACK;
+    if (options && options.back && enabledForApp(currentFile)) {
+      global.BACK = options.back;
+    }
+    setUI(mode, cb);
+  };
+
+  function goBack(lr, ud) {
+    // if it is a left to right swipe
+    if (lr === 1) {
+      // if we're in an app that has a back button, run the callback for it
+      if (global.BACK) {
+        global.BACK();
+      }
+    }
+  }
+
+  // Check if the back button should be enabled for the current app
+  // app is the src file of the app
+  function enabledForApp(app) {
+    if (!settings) return true;
+    if (settings.mode === 0) {
+      return !(settings.apps.filter((a) => a.src === app).length > 0);
+    } else if (settings.mode === 1) {
+      return settings.apps.filter((a) => a.src === app).length > 0;
+    } else {
+      return settings.mode === 2 ? true : false;
+    }
+  }
+
+  // Listen to left to right swipe
+  Bangle.on("swipe", goBack);
+})();

apps/backswipe/metadata.json

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+{ "id": "backswipe",
+  "name": "Back Swipe",
+  "shortName":"BackSwipe",
+  "version":"0.01",
+  "description": "Service that allows you to use an app's back button using left to right swipe gesture",
+  "icon": "app.png",
+  "tags": "back,gesture,swipe",
+  "supports" : ["BANGLEJS2"],
+  "type": "bootloader",
+  "storage": [
+    {"name":"backswipe.boot.js","url":"boot.js"},
+    {"name":"backswipe.settings.js","url":"settings.js"}
+  ],
+  "data": [
+    {"name":"backswipe.json"}
+  ]
+}

apps/backswipe/settings.js

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+(function(back) {
+  var FILE = 'backswipe.json';
+  // Mode can be 'blacklist', 'whitelist', 'on' or 'disabled'
+  // Apps is an array of app info objects, where all the apps that are there are either blocked or allowed, depending on the mode
+  var DEFAULTS = {
+    'mode': 0,
+    'apps': []
+  };
+  
+  var settings = {};
+  
+  var loadSettings = function() {
+    settings = require('Storage').readJSON(FILE, 1) || DEFAULTS;
+  }
+  
+  var saveSettings = function(settings) {
+    require('Storage').write(FILE, settings);
+  }
+  
+  // Get all app info files
+  var getApps = function() {
+    var apps = require('Storage').list(/\.info$/).map(appInfoFileName => {
+      var appInfo = require('Storage').readJSON(appInfoFileName, 1);
+      return appInfo && {
+        'name': appInfo.name,
+        'sortorder': appInfo.sortorder,
+        'src': appInfo.src
+      };
+    }).filter(app => app && !!app.src);
+    apps.sort((a, b) => {
+      var n = (0 | a.sortorder) - (0 | b.sortorder);
+      if (n) return n; // do sortorder first
+      if (a.name < b.name) return -1;
+      if (a.name > b.name) return 1;
+      return 0;
+    });
+    return apps;
+  }
+  
+  var showMenu = function() {
+    var menu = {
+      '': { 'title': 'Backswipe' },
+      '< Back': () => {
+        back();
+      },
+      'Mode': {
+        value: settings.mode,
+        min: 0,
+        max: 3,
+        format: v => ["Blacklist", "Whitelist", "Always On", "Disabled"][v],
+        onchange: v => {
+          settings.mode = v;
+          saveSettings(settings);
+        },
+      },
+      'App List': () => {
+        showAppSubMenu();
+      }
+    };
+    
+    E.showMenu(menu);
+  }
+  
+  var showAppSubMenu = function() {
+    var menu = {
+      '': { 'title': 'Backswipe' },
+      '< Back': () => {
+        showMenu();
+      },
+      'Add App': () => {
+        showAppList();
+      }
+    };
+    settings.apps.forEach(app => {
+      menu[app.name] = () => {
+        settings.apps.splice(settings.apps.indexOf(app), 1);
+        saveSettings(settings);
+        showAppSubMenu();
+      }
+    });
+    E.showMenu(menu);
+  }
+  
+  var showAppList = function() {
+    var apps = getApps();
+    var menu = {
+      '': { 'title': 'Backswipe' },
+      '< Back': () => {
+        showMenu();
+      }
+    };
+    apps.forEach(app => {
+      menu[app.name] = () => {
+        settings.apps.push(app); 
+        saveSettings(settings);
+        showAppSubMenu();
+      }
+    });
+    E.showMenu(menu);
+  }
+  
+  loadSettings();
+  showMenu();
+})