Updated list servers action so that it tries to fetch servers from the servers.json file when no local servers are found

package.json

@@ -3,7 +3,7 @@
   "description": "A React-based progressive web application for shlink",
   "version": "1.0.0",
   "private": false,
-  "homepage": "https://shlink.io",
+  "homepage": "",
   "scripts": {
     "lint": "npm run lint:js && npm run lint:css",
     "lint:js": "eslint src test scripts config",

src/common/Home.js

@@ -18,18 +18,20 @@ export default class Home extends React.Component {
   }
 
   render() {
-    const servers = values(this.props.servers);
+    const { servers: { list, loading } } = this.props;
+    const servers = values(list);
     const hasServers = !isEmpty(servers);
 
     return (
       <div className="home">
         <h1 className="home__title">Welcome to Shlink</h1>
         <h5 className="home__intro">
-          {hasServers && <span>Please, select a server.</span>}
-          {!hasServers && <span>Please, <Link to="/server/create">add a server</Link>.</span>}
+          {!loading && hasServers && <span>Please, select a server.</span>}
+          {!loading && !hasServers && <span>Please, <Link to="/server/create">add a server</Link>.</span>}
+          {loading && <span>Trying to load servers....</span>}
         </h5>
 
-        {hasServers && (
+        {!loading && hasServers && (
           <ListGroup className="home__servers-list">
             {servers.map(({ name, id }) => (
               <ListGroupItem

src/servers/ServersDropdown.js

@@ -14,7 +14,12 @@ const ServersDropdown = (serversExporter) => class ServersDropdown extends React
   };
 
   renderServers = () => {
-    const { servers, selectedServer, selectServer } = this.props;
+    const { servers: { list, loading }, selectedServer, selectServer } = this.props;
+    const servers = values(list);
+
+    if (loading) {
+      return <DropdownItem disabled><i>Trying to load servers...</i></DropdownItem>;
+    }
 
     if (isEmpty(servers)) {
       return <DropdownItem disabled><i>Add a server first...</i></DropdownItem>;
@@ -22,7 +27,7 @@ const ServersDropdown = (serversExporter) => class ServersDropdown extends React
 
     return (
       <React.Fragment>
-        {values(servers).map(({ name, id }) => (
+        {servers.map(({ name, id }) => (
           <DropdownItem
             key={id}
             tag={Link}
@@ -46,18 +51,14 @@ const ServersDropdown = (serversExporter) => class ServersDropdown extends React
     );
   };
 
-  componentDidMount() {
-    this.props.listServers();
-  }
+  componentDidMount = this.props.listServers;
 
-  render() {
-    return (
+  render = () => (
     <UncontrolledDropdown nav inNavbar>
       <DropdownToggle nav caret>Servers</DropdownToggle>
       <DropdownMenu right>{this.renderServers()}</DropdownMenu>
     </UncontrolledDropdown>
   );
-  }
 };
 
 export default ServersDropdown;

src/servers/helpers/ImportServersBtn.js

@@ -1,7 +1,5 @@
 import React from 'react';
 import { UncontrolledTooltip } from 'reactstrap';
-import { assoc, map } from 'ramda';
-import { v4 as uuid } from 'uuid';
 import PropTypes from 'prop-types';
 
 const ImportServersBtn = (serversImporter) => class ImportServersBtn extends React.Component {
@@ -22,10 +20,8 @@ const ImportServersBtn = (serversImporter) => class ImportServersBtn extends Rea
   render() {
     const { importServersFromFile } = serversImporter;
     const { onImport, createServers } = this.props;
-    const assocId = (server) => assoc('id', uuid(), server);
     const onChange = ({ target }) =>
       importServersFromFile(target.files[0])
-        .then(map(assocId))
         .then(createServers)
         .then(onImport)
         .then(() => {

src/servers/reducers/selectedServer.js

@@ -10,10 +10,10 @@ const initialState = null;
 
 export const resetSelectedServer = createAction(RESET_SELECTED_SERVER);
 
-export const selectServer = (serversService) => (serverId) => (dispatch) => {
+export const selectServer = ({ findServerById }) => (serverId) => (dispatch) => {
   dispatch(resetShortUrlParams());
 
-  const selectedServer = serversService.findServerById(serverId);
+  const selectedServer = findServerById(serverId);
 
   dispatch({
     type: SELECT_SERVER,

src/servers/reducers/server.js

@@ -1,16 +1,51 @@
-import { createAction, handleActions } from 'redux-actions';
-import { pipe } from 'ramda';
+import { handleActions } from 'redux-actions';
+import { pipe, isEmpty, assoc, map } from 'ramda';
+import { v4 as uuid } from 'uuid';
+import { homepage } from '../../../package.json';
 
+/* eslint-disable padding-line-between-statements */
+export const FETCH_SERVERS_START = 'shlink/servers/FETCH_SERVERS_START';
 export const FETCH_SERVERS = 'shlink/servers/FETCH_SERVERS';
+/* eslint-enable padding-line-between-statements */
 
-export const listServers = ({ listServers }) => createAction(FETCH_SERVERS, () => listServers());
+const initialState = {
+  list: {},
+  loading: false,
+};
 
-export const createServer = ({ createServer }, listServers) => pipe(createServer, listServers);
-
-export const deleteServer = ({ deleteServer }, listServers) => pipe(deleteServer, listServers);
-
-export const createServers = ({ createServers }, listServers) => pipe(createServers, listServers);
+const assocId = (server) => assoc('id', uuid(), server);
 
 export default handleActions({
-  [FETCH_SERVERS]: (state, { payload }) => payload,
-}, {});
+  [FETCH_SERVERS_START]: (state) => ({ ...state, loading: true }),
+  [FETCH_SERVERS]: (state, { list }) => ({ list, loading: false }),
+}, initialState);
+
+export const listServers = ({ listServers, createServers }, { get }) => () => async (dispatch) => {
+  dispatch({ type: FETCH_SERVERS_START });
+
+  // Fetch list from local storage.
+  const localList = listServers();
+
+  if (!isEmpty(localList)) {
+    dispatch({ type: FETCH_SERVERS, list: localList });
+
+    return;
+  }
+
+  // If local list is empty, try to fetch it remotely, calculate IDs for every server, and use it
+  const { data: remoteList } = await get(`${homepage}/servers.json`);
+  const listWithIds = map(assocId, remoteList);
+
+  createServers(listWithIds);
+  dispatch({ type: FETCH_SERVERS, list: listWithIds });
+};
+
+export const createServer = ({ createServer }, listServersAction) => pipe(createServer, listServersAction);
+
+export const deleteServer = ({ deleteServer }, listServersAction) => pipe(deleteServer, listServersAction);
+
+export const createServers = ({ createServers }, listServersAction) => pipe(
+  map(assocId),
+  createServers,
+  listServersAction
+);

src/servers/services/ServersImporter.js

@@ -1,9 +1,3 @@
-import PropTypes from 'prop-types';
-
-export const serversImporterType = PropTypes.shape({
-  importServersFromFile: PropTypes.func,
-});
-
 export default class ServersImporter {
   constructor(csvjson) {
     this.csvjson = csvjson;

src/servers/services/ServersService.js

@@ -1,10 +1,11 @@
-import { assoc, dissoc, reduce } from 'ramda';
+import { assoc, curry, dissoc, reduce } from 'ramda';
 
 const SERVERS_STORAGE_KEY = 'servers';
 
 export default class ServersService {
   constructor(storage) {
     this.storage = storage;
+    this.setServers = curry(this.storage.set)(SERVERS_STORAGE_KEY);
   }
 
   listServers = () => this.storage.get(SERVERS_STORAGE_KEY) || {};
@@ -20,12 +21,9 @@ export default class ServersService {
       servers
     );
 
-    this.storage.set(SERVERS_STORAGE_KEY, allServers);
+    this.setServers(allServers);
   };
 
-  deleteServer = (server) =>
-    this.storage.set(
-      SERVERS_STORAGE_KEY,
-      dissoc(server.id, this.listServers())
-    );
+  deleteServer = ({ id }) =>
+    this.setServers(dissoc(id, this.listServers()));
 }

src/servers/services/provideServices.js

@@ -38,7 +38,7 @@ const provideServices = (bottle, connect, withRouter) => {
   bottle.serviceFactory('createServer', createServer, 'ServersService', 'listServers');
   bottle.serviceFactory('createServers', createServers, 'ServersService', 'listServers');
   bottle.serviceFactory('deleteServer', deleteServer, 'ServersService', 'listServers');
-  bottle.serviceFactory('listServers', listServers, 'ServersService');
+  bottle.serviceFactory('listServers', listServers, 'ServersService', 'axios');
 
   bottle.serviceFactory('resetSelectedServer', () => resetSelectedServer);
 };