Explore view save modal spec (#3110)

* split reducer logic for ExploreViewContainer

* fix saveModal component and unit tests

* revert changes in SaveModal_spec.
will make another commit just to improve test coverage for SaveModal component.

* improve test coverage for explore view components:
- SaveModal component
- URLShortLinkButton

* remove comment-out code

* [bugfix] wrong 'Cant have overlap between Series and Breakdowns' (#3254)

* [explore] make edit datasource a basic link (#3244)

* Relying on FAB for font-awesome.min.css (#3261)

* Modernize SQLA pessimistic handling (#3256)

Looks like SQLAlchemy has redefined the best practice around
pessimistic connection handling.

* [webpack] break CSS and JS files while webpackin' (#3262)

* [webpack] break CSS and JS files while webpackin'

* cleaning up some templates

* Fix pylint issue

* import logging (#3264)

* [bugfix] preserve order in groupby (#3268)

Recently in
4c3313b01c
I introduced an issue where the order of groupby fields might change.

This addresses this issue and will preserve ordering.

* Explicitly add Flask as dependancy (#3252)

* Use sane Celery defaults to prevent tasks from being delayed (#3267)

* Improve the chart type of Visualize in sqllab (#3241)

* Improve the chart type of Visualize in sqllab & Add some css & Fix the link address in the navbar

* add vizTypes filter

* Set default ports Druid (#3266)

For Druid set the default port for the broker and coordinator.

* [explore] Split large reducer logic in ExploreViewContainer (#3088)

* split reducer logic for ExploreViewContainer

* fix saveModal component and unit tests

* revert changes in SaveModal_spec.
will make another commit just to improve test coverage for SaveModal component.

* remove comment-out code

* fix merge confilicts

superset/assets/javascripts/explore/actions/exploreActions.js

@@ -14,6 +14,11 @@ export function setDatasource(datasource) {
   return { type: SET_DATASOURCE, datasource };
 }
 
+export const SET_DATASOURCES = 'SET_DATASOURCES';
+export function setDatasources(datasources) {
+  return { type: SET_DATASOURCES, datasources };
+}
+
 export const FETCH_DATASOURCE_STARTED = 'FETCH_DATASOURCE_STARTED';
 export function fetchDatasourceStarted() {
   return { type: FETCH_DATASOURCE_STARTED };
@@ -29,6 +34,21 @@ export function fetchDatasourceFailed(error) {
   return { type: FETCH_DATASOURCE_FAILED, error };
 }
 
+export const FETCH_DATASOURCES_STARTED = 'FETCH_DATASOURCES_STARTED';
+export function fetchDatasourcesStarted() {
+  return { type: FETCH_DATASOURCES_STARTED };
+}
+
+export const FETCH_DATASOURCES_SUCCEEDED = 'FETCH_DATASOURCES_SUCCEEDED';
+export function fetchDatasourcesSucceeded() {
+  return { type: FETCH_DATASOURCES_SUCCEEDED };
+}
+
+export const FETCH_DATASOURCES_FAILED = 'FETCH_DATASOURCES_FAILED';
+export function fetchDatasourcesFailed(error) {
+  return { type: FETCH_DATASOURCES_FAILED, error };
+}
+
 export const RESET_FIELDS = 'RESET_FIELDS';
 export function resetControls() {
   return { type: RESET_FIELDS };
@@ -61,6 +81,24 @@ export function fetchDatasourceMetadata(datasourceKey, alsoTriggerQuery = false)
   };
 }
 
+export function fetchDatasources() {
+  return function (dispatch) {
+    dispatch(fetchDatasourcesStarted());
+    const url = '/superset/datasources/';
+    $.ajax({
+      type: 'GET',
+      url,
+      success: (data) => {
+        dispatch(setDatasources(data));
+        dispatch(fetchDatasourcesSucceeded());
+      },
+      error(error) {
+        dispatch(fetchDatasourcesFailed(error.responseJSON.error));
+      },
+    });
+  };
+}
+
 export const TOGGLE_FAVE_STAR = 'TOGGLE_FAVE_STAR';
 export function toggleFaveStar(isStarred) {
   return { type: TOGGLE_FAVE_STAR, isStarred };