SQL Lab - A multi-tab SQL editor (#514)

* Carapal react mockup

This is really just a mock up written in React to try different
components. It could become scaffolding to build a prototype, or not.

* Merging in Alanna's theme tweaks for SQL lab

* Tweak the display of the alert message in navbar

* Sketching the middleware refresh for Queries

* Adjustments

* Implement timer sync.

* CTAS

* Refactor the queries to be stored as a dict. (#994)

* Download csv endpoint. (#992)

* CSV download engdpoint.

* Use lower case booleans.

* Replcate loop with the object lookup by key.

* First changes for the sync

* Address comments

* Fix query deletions. Update only the queries from the store.

* Sync queries using tmp_id.

* simplify

* Fix the tests in the carapal. (#1023)

* Sync queries using tmp_id.

* Fix the unit tests

* Bux fixes. Pass 2.

* Tweakin' & linting

* Adding alpha label to the SQL LAb navbar entry

* Fixing the python unit tests

caravel/assets/javascripts/SqlLab/components/Timer.jsx

@@ -0,0 +1,61 @@
+import React from 'react';
+import { now, fDuration } from '../../modules/dates';
+
+import { STATE_BSSTYLE_MAP } from '../common.js';
+
+class Timer extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      clockStr: '',
+    };
+  }
+  componentWillMount() {
+    this.startTimer();
+  }
+  componentWillUnmount() {
+    this.stopTimer();
+  }
+  startTimer() {
+    if (!(this.timer)) {
+      this.timer = setInterval(this.stopwatch.bind(this), 30);
+    }
+  }
+  stopTimer() {
+    clearInterval(this.timer);
+    this.timer = null;
+  }
+  stopwatch() {
+    if (this.props && this.props.query) {
+      const since = (this.props.query.endDttm) ? this.props.query.endDttm : now();
+      const clockStr = fDuration(this.props.query.startDttm, since);
+      this.setState({ clockStr });
+      if (this.props.query.state !== 'running') {
+        this.stopTimer();
+      }
+    }
+  }
+  render() {
+    if (this.props.query && this.props.query.state === 'running') {
+      this.startTimer();
+    }
+    let timerSpan = null;
+    if (this.props && this.props.query) {
+      const bsStyle = STATE_BSSTYLE_MAP[this.props.query.state];
+      timerSpan = (
+        <span className={'inlineBlock m-r-5 label label-' + bsStyle}>
+          {this.state.clockStr}
+        </span>
+      );
+    }
+    return timerSpan;
+  }
+}
+Timer.propTypes = {
+  query: React.PropTypes.object,
+};
+Timer.defaultProps = {
+  query: null,
+};
+
+export default Timer;