Some minor refactorings

src/servers/reducers/servers.js

@@ -0,0 +1,55 @@
+import { handleActions } from 'redux-actions';
+import { pipe, isEmpty, assoc, map, prop } from 'ramda';
+import { v4 as uuid } from 'uuid';
+import { homepage } from '../../../package.json';
+
+export const LIST_SERVERS = 'shlink/servers/LIST_SERVERS';
+
+const initialState = {};
+
+const assocId = (server) => assoc('id', server.id || uuid(), server);
+
+export default handleActions({
+  [LIST_SERVERS]: (state, { list }) => list,
+}, initialState);
+
+export const listServers = ({ listServers, createServers }, { get }) => () => async (dispatch) => {
+  const localList = listServers();
+
+  if (!isEmpty(localList)) {
+    dispatch({ type: LIST_SERVERS, list: localList });
+
+    return;
+  }
+
+  // If local list is empty, try to fetch it remotely (making sure it's an array) and calculate IDs for every server
+  const getDataAsArrayWithIds = pipe(
+    prop('data'),
+    (value) => {
+      if (!Array.isArray(value)) {
+        throw new Error('Value is not an array');
+      }
+
+      return value;
+    },
+    map(assocId),
+  );
+  const remoteList = await get(`${homepage}/servers.json`)
+    .then(getDataAsArrayWithIds)
+    .catch(() => []);
+
+  createServers(remoteList);
+  dispatch({ type: LIST_SERVERS, list: remoteList.reduce((map, server) => ({ ...map, [server.id]: server }), {}) });
+};
+
+export const createServer = ({ createServer }, listServersAction) => pipe(createServer, listServersAction);
+
+export const editServer = ({ editServer }, listServersAction) => pipe(editServer, listServersAction);
+
+export const deleteServer = ({ deleteServer }, listServersAction) => pipe(deleteServer, listServersAction);
+
+export const createServers = ({ createServers }, listServersAction) => pipe(
+  map(assocId),
+  createServers,
+  listServersAction
+);