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behavior-phui-file-upload.js
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			/**
			* @provides javelin-behavior-phui-file-upload
			* @requires javelin-behavior
			* javelin-stratcom
			* javelin-dom
			* phuix-dropdown-menu
			*/

			JX.behavior('phui-file-upload', function(config) {

			function startUpload(workflow, input) {
			var files = input.files;

			if (!files \|\| !files.length) {
			return;
			}

			var state = {
			workflow: workflow,
			input: input,
			waiting: 0,
			phids: []
			};

			var callback = JX.bind(null, didUpload, state);

			var dummy = input;
			var uploader = new JX.PhabricatorDragAndDropFileUpload(dummy)
			.setURI(config.uploadURI)
			.setChunkThreshold(config.chunkThreshold);

			uploader.listen('didUpload', callback);
			uploader.start();

			workflow.pause();
			for (var ii = 0; ii < files.length; ii++) {
			state.waiting++;
			uploader.sendRequest(files[ii]);
			}
			}

			function didUpload(state, file) {
			state.phids.push(file.getPHID());
			state.waiting--;

			if (state.waiting) {
			return;
			}

			state.workflow
			.addData(config.inputName, state.phids.join(', '))
			.resume();
			}

			JX.Workflow.listen('start', function(workflow) {
			var form = workflow.getSourceForm();
			if (!form) {
			return;
			}

			var input;
			try {
			input = JX.$(config.fileInputID);
			} catch (ex) {
			return;
			}

			var local_form = JX.DOM.findAbove(input, 'form');
			if (!local_form) {
			return;
			}

			if (local_form !== form) {
			return;
			}

			startUpload(workflow, input);
			});

			});