Refactor bucket delete and bucket policy (#5580)

This commit adds the bucket delete and bucket policy functionalities
to the browser.

Part of rewriting the browser code to follow best practices and
guidelines of React (issues #5409 and #5410)

The backend code has been modified by @krishnasrinivas to prevent
issue #4498 from occuring. The relevant changes have been made to the
code according to the latest commit and the unit tests in the backend.
This commit also addresses issue #5449.

browser/app/js/buckets/actions.js

@@ -22,11 +22,14 @@ import { pathSlice } from "../utils"
 
 export const SET_LIST = "buckets/SET_LIST"
 export const ADD = "buckets/ADD"
+export const REMOVE = "buckets/REMOVE"
 export const SET_FILTER = "buckets/SET_FILTER"
 export const SET_CURRENT_BUCKET = "buckets/SET_CURRENT_BUCKET"
 export const SHOW_MAKE_BUCKET_MODAL = "buckets/SHOW_MAKE_BUCKET_MODAL"
+export const SHOW_BUCKET_POLICY = "buckets/SHOW_BUCKET_POLICY"
+export const SET_POLICIES = "buckets/SET_POLICIES"
 
-export const fetchBuckets = () => {
+export const fetchBuckets = action => {
   return function(dispatch) {
     return web.ListBuckets().then(res => {
       const buckets = res.buckets ? res.buckets.map(bucket => bucket.name) : []
@@ -38,6 +41,9 @@ export const fetchBuckets = () => {
         } else {
           dispatch(selectBucket(buckets[0]))
         }
+      } else if (action === "delete") {
+        dispatch(selectBucket(""))
+        history.replace("/")
       }
     })
   }
@@ -92,11 +98,43 @@ export const makeBucket = bucket => {
   }
 }
 
+export const deleteBucket = bucket => {
+  return function(dispatch) {
+    return web
+      .DeleteBucket({
+        bucketName: bucket
+      })
+      .then(() => {
+        dispatch(
+          alertActions.set({
+            type: "info",
+            message: "Bucket '" + bucket + "' has been deleted."
+          })
+        )
+        dispatch(removeBucket(bucket))
+        dispatch(fetchBuckets("delete"))
+      })
+      .catch(err => { 
+        dispatch(
+          alertActions.set({
+            type: "danger",
+            message: err.message
+          })
+        )
+      })
+  }
+}
+
 export const addBucket = bucket => ({
   type: ADD,
   bucket
 })
 
+export const removeBucket = bucket => ({
+  type: REMOVE,
+  bucket
+})
+
 export const showMakeBucketModal = () => ({
   type: SHOW_MAKE_BUCKET_MODAL,
   show: true
@@ -106,3 +144,42 @@ export const hideMakeBucketModal = () => ({
   type: SHOW_MAKE_BUCKET_MODAL,
   show: false
 })
+
+export const fetchPolicies = bucket => {
+  return function(dispatch) {
+    return web
+      .ListAllBucketPolicies({
+        bucketName: bucket
+      })
+      .then(res => {
+        let policies = res.policies
+        if(policies)
+          dispatch(setPolicies(policies))
+        else
+          dispatch(setPolicies([]))
+      })
+      .catch(err => {
+        dispatch(
+          alertActions.set({
+            type: "danger",
+            message: err.message
+          })
+        )
+      })
+  }
+}
+
+export const setPolicies = policies => ({
+  type: SET_POLICIES,
+  policies
+})
+
+export const showBucketPolicy = () => ({
+  type: SHOW_BUCKET_POLICY,
+  show: true
+})
+
+export const hideBucketPolicy = () => ({
+  type: SHOW_BUCKET_POLICY,
+  show: false
+})