Merge ohtuilmo-backend into ohtuilmo

backend/utils/index.js

@@ -0,0 +1,70 @@
+const randomstring = require('randomstring')
+
+/**
+ * @typedef {'topicAccepted' | 'topicRejected' | 'customerReviewLink'} MessageType
+ * @typedef {'finnish' | 'english'} MessageLanguage
+ * @typedef {'topic_accepted_fin' | 'topic_accepted_eng' | 'topic_rejected_fin' | 'topic_rejected_eng' | 'customer_review_link_fin' | 'customer_review_link_eng'} TemplateName
+ */
+
+/**
+ * @type {{[key: string]: { [key: string]: TemplateName }}}
+ */
+const msgTypeToDbColumn = {
+  topicAccepted: {
+    finnish: 'topic_accepted_fin',
+    english: 'topic_accepted_eng'
+  },
+  topicRejected: {
+    finnish: 'topic_rejected_fin',
+    english: 'topic_rejected_eng'
+  },
+  customerReviewLink: {
+    finnish: 'customer_review_link_fin',
+    english: 'customer_review_link_eng'
+  }
+}
+
+/**
+ * @type {{[key: string]: {type: MessageType, language: MessageLanguage}}}
+ */
+const dbColumnToMsgType = {
+  topic_accepted_fin: { type: 'topicAccepted', language: 'finnish' },
+  topic_accepted_eng: { type: 'topicAccepted', language: 'english' },
+  topic_rejected_fin: { type: 'topicRejected', language: 'finnish' },
+  topic_rejected_eng: { type: 'topicRejected', language: 'english' },
+  customer_review_link_fin: { type: 'customerReviewLink', language: 'finnish' },
+  customer_review_link_eng: { type: 'customerReviewLink', language: 'english' }
+}
+
+/**
+ * @param {MessageType} messageType
+ * @param {MessageLanguage} messageLanguage
+ * @returns {TemplateName}
+ */
+const emailTypeToTemplateName = (messageType, messageLanguage) =>
+  msgTypeToDbColumn[messageType][messageLanguage]
+
+/**
+ * @param {TemplateName} templateName
+ * @returns {{type: MessageType, language: MessageLanguage}}
+ */
+const templateNameToEmailType = (templateName) =>
+  dbColumnToMsgType[templateName]
+
+/**
+ * reverse(uppercase(trim(str)))
+ *   is same as  ↓
+ * pipe(trim, uppercase, reverse)(str)
+ */
+const pipe = (...fns) => (value) => fns.reduce((v, fn) => fn(v), value)
+
+const getRandomId = () => {
+  return 'a' + randomstring.generate(16)
+}
+
+module.exports = {
+  emailTypeToTemplateName,
+  templateNameToEmailType,
+  pipe,
+  getRandomId
+}