Redo the UI for the run trigger dialog to be much cleaner

Fixes #774

static/js/directives/ui/file-upload-box.js

@@ -0,0 +1,154 @@
+/**
+ * An element which adds a stylize box for uploading a file.
+ */
+angular.module('quay').directive('fileUploadBox', function () {
+  var directiveDefinitionObject = {
+    priority: 0,
+    templateUrl: '/static/directives/file-upload-box.html',
+    replace: false,
+    transclude: true,
+    restrict: 'C',
+    scope: {
+      'allowMultiple': '@allowMultiple',
+      'selectMessage': '@selectMessage',
+
+      'filesSelected': '&filesSelected',
+      'filesCleared': '&filesCleared',
+      'filesValidated': '&filesValidated'
+    },
+    controller: function($rootScope, $scope, $element, ApiService) {
+      var MEGABYTE = 1000000;
+      var MAX_FILE_SIZE = MAX_FILE_SIZE_MB * MEGABYTE;
+      var MAX_FILE_SIZE_MB = 100;
+
+      var number = $rootScope.__fileUploadBoxIdCounter || 0;
+      $rootScope.__fileUploadBoxIdCounter = number + 1;
+
+      $scope.boxId = number;
+      $scope.state = 'clear';
+      $scope.selectedFiles = [];
+
+      var conductUpload = function(file, url, fileId, mimeType, progressCb, doneCb) {
+        var request = new XMLHttpRequest();
+        request.open('PUT', url, true);
+        request.setRequestHeader('Content-Type', mimeType);
+        request.onprogress = function(e) {
+          $scope.$apply(function() {
+            if (e.lengthComputable) { progressCb((e.loaded / e.total) * 100); }
+          });
+        };
+
+        request.onerror = function() {
+          $scope.$apply(function() { doneCb(false, 'Error when uploading'); });
+        };
+
+        request.onreadystatechange = function() {
+          var state = request.readyState;
+          var status = request.status;
+
+          if (state == 4) {
+            if (Math.floor(status / 100) == 2) {
+              $scope.$apply(function() { doneCb(true, fileId); });
+            } else {
+              var message = request.statusText;
+              if (status == 413) {
+                message = 'Selected file too large to upload';
+              }
+
+              $scope.$apply(function() { doneCb(false, message); });
+            }
+          }
+        };
+
+        request.send(file);
+      };
+
+      var uploadFiles = function(callback) {
+        var currentIndex = 0;
+        var fileIds = [];
+
+        var progressCb = function(progress) {
+          $scope.uploadProgress = progress;
+        };
+
+        var doneCb = function(status, messageOrId) {
+          if (status) {
+            fileIds.push(messageOrId);
+            currentIndex++;
+            performFileUpload();
+          } else {
+            callback(false, messageOrId);
+          }
+        };
+
+        var performFileUpload = function() {
+          // If we have finished uploading all of the files, invoke the overall callback
+          // with the list of file IDs.
+          if (currentIndex >= $scope.selectedFiles.length) {
+            callback(true, fileIds);
+            return;
+          }
+
+          // For the current file, retrieve a file-drop URL from the API for the file.
+          var currentFile = $scope.selectedFiles[currentIndex];
+          var mimeType = currentFile.type || 'application/octet-stream';
+          var data = {
+            'mimeType': mimeType
+          };
+
+          $scope.currentlyUploadingFile = currentFile;
+          $scope.uploadProgress = 0;
+
+          ApiService.getFiledropUrl(data).then(function(resp) {
+            // Perform the upload.
+            conductUpload(currentFile, resp.url, resp.file_id, mimeType, progressCb, doneCb);
+          }, function() {
+            callback(false, 'Could not retrieve upload URL');
+          });
+        };
+
+        // Start the uploading.
+        $scope.state = 'uploading';
+        performFileUpload();
+      };
+
+      $scope.handleFilesChanged = function(files) {
+        if ($scope.state == 'uploading') { return; }
+
+        $scope.message = null;
+        $scope.selectedFiles = files;
+
+        if (files.length == 0) {
+          $scope.state = 'clear';
+          $scope.filesCleared();
+        } else {
+          for (var i = 0; i < files.length; ++i) {
+            if (files[i].size > MAX_FILE_SIZE) {
+              $scope.state = 'error';
+              $scope.message = 'File ' + files[i].name + ' is larger than the maximum file ' +
+                               'size of ' + MAX_FILE_SIZE_MB + ' MB';
+              return;
+            }
+          }
+
+          $scope.state = 'checking';
+          $scope.filesSelected({
+            'files': files,
+            'callback': function(status, message) {
+              $scope.state = status ? 'okay' : 'error';
+              $scope.message = message;
+
+              if (status) {
+                $scope.filesValidated({
+                  'files': files,
+                  'uploadFiles': uploadFiles
+                });
+              }
+            }
+          });
+        }
+      };
+    }
+  };
+  return  directiveDefinitionObject;
+});