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js/util/desktop-apps.js

@@ -0,0 +1,96 @@
+var ini = require('ini');
+var glob = require('glob');
+var path = require('path');
+var fs = require('fs');
+
+// Constants
+var ICON_REALPATH_REGEX = /\..+$/;
+
+exports.loadAllDesktopFiles = function(rootDirs) {
+
+  return exports.findAllDesktopFiles(rootDirs)
+    .then(function(filePaths) {
+
+      var promises = filePaths.map(function(path) {
+        return exports.loadDesktopFile(path);
+      });
+
+      return Promise.all(promises)
+        .then(function(contents) {
+          return contents.map(function(content, i) {
+            return { content: content, path: filePaths[i] };
+          });
+        })
+      ;
+
+    })
+  ;
+
+};
+
+exports.findAllDesktopFiles = function(rootDirs) {
+
+  if(!Array.isArray(rootDirs)) {
+    rootDirs = [rootDirs];
+  }
+
+  var promises = rootDirs.map(function(rootDir) {
+
+    var globPath = path.join(rootDir, '**/*.desktop');
+
+    return new Promise(function(resolve, reject) {
+      glob(globPath, function(err, files) {
+        if(err) return reject(err);
+        return resolve(files);
+      });
+    });
+
+  });
+
+  return Promise.all(promises)
+    .then(function(apps) {
+      return uniq(flatten(apps));
+    })
+  ;
+
+};
+
+exports.loadDesktopFile = function(filePath) {
+  return new Promise(function(resolve, reject) {
+    fs.readFile(filePath, 'utf8', function(err, content) {
+      if(err) return reject(err);
+      try {
+        var decoded = ini.decode(content);
+        return resolve(decoded);
+      } catch(err) {
+        return reject(err);
+      }
+    });
+  });
+};
+
+exports.findIcon = function(iconPath) {
+  return new Promise(function(resolve, reject) {
+    if( ICON_REALPATH_REGEX.test(iconPath) ) {
+      return resolve(iconPath);
+    }
+  });
+};
+
+// Array helpers
+
+function flatten(arr) {
+  return arr.reduce(function(result, item) {
+    result = result.concat.apply(result, Array.isArray(item) ? flatten(item) : [item]);
+    return result;
+  }, []);
+}
+
+function uniq(arr) {
+  return arr.reduce(function(result, item) {
+    if(result.indexOf(item) === -1) {
+      result.push(item);
+    }
+    return result;
+  }, []);
+}