Refactor automatic camel casing of API response fields.

- Remove `humps` lib dependency with a new util function.
- Replace hacky way of excluding certain fields in responses with
  a proper key filtering mechanism.

frontend/package.json

@@ -16,7 +16,6 @@
     "codeflask": "^1.4.1",
     "core-js": "^3.12.1",
     "dayjs": "^1.10.4",
-    "humps": "^2.0.1",
     "indent.js": "^0.3.5",
     "qs": "^6.10.1",
     "textversionjs": "^1.1.3",

frontend/src/api/index.js

@@ -1,9 +1,9 @@
 import { ToastProgrammatic as Toast } from 'buefy';
 import axios from 'axios';
-import humps from 'humps';
 import qs from 'qs';
 import store from '../store';
 import { models } from '../constants';
+import Utils from '../utils';
 
 const http = axios.create({
   baseURL: process.env.VUE_APP_ROOT_URL || '/',
@@ -15,6 +15,7 @@ const http = axios.create({
   paramsSerializer: (params) => qs.stringify(params, { arrayFormat: 'repeat' }),
 });
 
+const utils = new Utils();
 
 // Intercept requests to set the 'loading' state of a model.
 http.interceptors.request.use((config) => {
@@ -34,28 +35,25 @@ http.interceptors.response.use((resp) => {
 
   let data = {};
   if (typeof resp.data.data === 'object') {
-    data = { ...resp.data.data };
-    if (!resp.config.preserveCase) {
-      // Transform field case.
-      data = humps.camelizeKeys(resp.data.data);
+    if (resp.data.data.constructor === Object) {
+      data = { ...resp.data.data };
+    } else {
+      data = [...resp.data.data];
     }
 
-    if (resp.config.preserveCase && resp.config.preserveResultsCase) {
-      // For each key in preserveResultsCase, get the values out in an array of arrays
-      // and save them as stringified JSON.
-      const save = resp.data.data.results.map(
-        (r) => resp.config.preserveResultsCase.map((k) => JSON.stringify(r[k])),
-      );
-
-      // Camelcase everything.
-      data = humps.camelizeKeys(resp.data.data);
-
-      // Put the saved results back.
-      data.results.forEach((r, n) => {
-        resp.config.preserveResultsCase.forEach((k, i) => {
-          data.results[n][k] = JSON.parse(save[n][i]);
-        });
-      });
+    // Transform keys to camelCase.
+    switch (typeof resp.config.camelCase) {
+      case 'function':
+        data = utils.camelKeys(data, resp.config.camelCase);
+        break;
+      case 'boolean':
+        if (resp.config.camelCase) {
+          data = utils.camelKeys(data);
+        }
+        break;
+      default:
+        data = utils.camelKeys(data);
+        break;
     }
   } else {
     data = resp.data.data;
@@ -136,8 +134,7 @@ export const getSubscribers = async (params) => http.get('/api/subscribers',
     params,
     loading: models.subscribers,
     store: models.subscribers,
-    preserveCase: true,
-    preserveResultsCase: ['attribs'],
+    camelCase: (keyPath) => !keyPath.startsWith('.results.*.attribs'),
   });
 
 export const getSubscriber = async (id) => http.get(`/api/subscribers/${id}`,
@@ -188,7 +185,7 @@ export const importSubscribers = (data) => http.post('/api/import/subscribers',
 export const getImportStatus = () => http.get('/api/import/subscribers');
 
 export const getImportLogs = async () => http.get('/api/import/subscribers/logs',
-  { preserveCase: true });
+  { camelCase: false });
 
 export const stopImport = () => http.delete('/api/import/subscribers');
 
@@ -197,11 +194,17 @@ export const getBounces = async (params) => http.get('/api/bounces',
   { params, loading: models.bounces });
 
 // Campaigns.
-export const getCampaigns = async (params) => http.get('/api/campaigns',
-  { params, loading: models.campaigns, store: models.campaigns });
+export const getCampaigns = async (params) => http.get('/api/campaigns', {
+  params,
+  loading: models.campaigns,
+  store: models.campaigns,
+  camelCase: (keyPath) => !keyPath.startsWith('.results.*.headers'),
+});
 
-export const getCampaign = async (id) => http.get(`/api/campaigns/${id}`,
-  { loading: models.campaigns });
+export const getCampaign = async (id) => http.get(`/api/campaigns/${id}`, {
+  loading: models.campaigns,
+  camelCase: (keyPath) => !keyPath.startsWith('.headers'),
+});
 
 export const getCampaignStats = async () => http.get('/api/campaigns/running/stats', {});
 
@@ -263,19 +266,19 @@ export const deleteTemplate = async (id) => http.delete(`/api/templates/${id}`,
 
 // Settings.
 export const getServerConfig = async () => http.get('/api/config',
-  { loading: models.serverConfig, store: models.serverConfig, preserveCase: true });
+  { loading: models.serverConfig, store: models.serverConfig, camelCase: false });
 
 export const getSettings = async () => http.get('/api/settings',
-  { loading: models.settings, store: models.settings, preserveCase: true });
+  { loading: models.settings, store: models.settings, camelCase: false });
 
 export const updateSettings = async (data) => http.put('/api/settings', data,
   { loading: models.settings });
 
 export const getLogs = async () => http.get('/api/logs',
-  { loading: models.logs });
+  { loading: models.logs, camelCase: false });
 
 export const getLang = async (lang) => http.get(`/api/lang/${lang}`,
-  { loading: models.lang, preserveCase: true });
+  { loading: models.lang, camelCase: false });
 
 export const logout = async () => http.get('/api/logout', {
   auth: { username: 'wrong', password: 'wrong' },

frontend/src/utils.js

@@ -147,4 +147,45 @@ export default class Utils {
   // Takes a props.row from a Buefy b-column <td> template and
   // returns a `data-id` attribute which Buefy then applies to the td.
   tdID = (row) => ({ 'data-id': row.id.toString() });
+
+  camelString = (str) => {
+    const s = str.replace(/[-_\s]+(.)?/g, (match, chr) => (chr ? chr.toUpperCase() : ''));
+    return s.substr(0, 1).toLowerCase() + s.substr(1);
+  }
+
+  // camelKeys recursively camelCases all keys in a given object (array or {}).
+  // For each key it traverses, it passes a dot separated key path to an optional testFunc() bool.
+  // so that it can camelcase or leave a particular key alone based on what testFunc() returns.
+  // eg: The keypath for {"data": {"results": ["created_at": 123]}} is
+  // .data.results.*.created_at (array indices become *)
+  // testFunc() can examine this key and return true to convert it to camelcase
+  // or false to leave it as-is.
+  camelKeys = (obj, testFunc, keys) => {
+    if (obj === null) {
+      return obj;
+    }
+
+    if (Array.isArray(obj)) {
+      return obj.map((o) => this.camelKeys(o, testFunc, `${keys || ''}.*`));
+    }
+
+    if (obj.constructor === Object) {
+      return Object.keys(obj).reduce((result, key) => {
+        const keyPath = `${keys || ''}.${key}`;
+        let k = key;
+
+        // If there's no testfunc or if a function is defined and it returns true, convert.
+        if (testFunc === undefined || testFunc(keyPath)) {
+          k = this.camelString(key);
+        }
+
+        return {
+          ...result,
+          [k]: this.camelKeys(obj[key], testFunc, keyPath),
+        };
+      }, {});
+    }
+
+    return obj;
+  };
 }

frontend/yarn.lock

@@ -5623,11 +5623,6 @@ human-signals@^1.1.1:
   resolved "https://registry.yarnpkg.com/human-signals/-/human-signals-1.1.1.tgz#c5b1cd14f50aeae09ab6c59fe63ba3395fe4dfa3"
   integrity sha512-SEQu7vl8KjNL2eoGBLF3+wAjpsNfA9XMlXAYj/3EdaNfAlxKthD1xjEQfGOUhllCGGJVNY34bRr6lPINhNjyZw==
 
-humps@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/humps/-/humps-2.0.1.tgz#dd02ea6081bd0568dc5d073184463957ba9ef9aa"
-  integrity sha1-3QLqYIG9BWjcXQcxhEY5V7qe+ao=
-
 iconv-lite@0.4, iconv-lite@0.4.24, iconv-lite@^0.4.24:
   version "0.4.24"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.24.tgz#2022b4b25fbddc21d2f524974a474aafe733908b"