Solution

routes/api.js

@@ -1,27 +1,114 @@
-'use strict';
+"use strict";
+const { randomBytes } = require("node:crypto");
 
 module.exports = function (app) {
+  const projectsIssues = {};
+  const compulsoryFields = new Set(["issue_title", "issue_text", "created_by"]);
+  const optionalFields = new Set(["assigned_to", "status_text"]);
+  const updateFields = new Set([
+    "issue_title",
+    "issue_text",
+    "created_by",
+    "assigned_to",
+    "status_text",
+  ]);
+  const queryFilters = new Set([
+    "_id",
+    "issue_title",
+    "issue_text",
+    "created_by",
+    "assigned_to",
+    "status_text",
+    "open",
+  ]);
+  const autoGeneratedFields = new Map([
+    // FXIME: Not handling potential ID collisions
+    ["_id", () => randomBytes(20).toString("hex")],
+    ["created_on", () => new Date().toISOString()],
+    ["updated_on", () => new Date().toISOString()],
+    ["open", () => true],
+  ]);
 
-  app.route('/api/issues/:project')
-  
-    .get(function (req, res){
-      let project = req.params.project;
-      
+  app
+    .route("/api/issues/:project")
+
+    .get(function (req, res) {
+      const project = req.params.project;
+      const issues = projectsIssues[project];
+      const filters = {};
+      for (const name of queryFilters) {
+        if (req.query[name])
+          filters[name] = Array.isArray(req.query[name])
+            ? req.query[name][0]
+            : req.query[name];
+      }
+      if (!issues) res.status(404).json({ error: "Project not found" });
+      else
+        res.json(
+          Object.values(issues).filter((issue) =>
+            Object.entries(filters).every(([k, v]) => issue[k] === v)
+          )
+        );
     })
-    
-    .post(function (req, res){
-      let project = req.params.project;
-      
+
+    .post(function (req, res) {
+      const project = req.params.project;
+      if (!project) {
+        res.status(400).json({ error: "Project not specified" });
+        return;
+      }
+      const issue = {};
+      for (const name of compulsoryFields) {
+        if (!req.body[name]) {
+          res.status(400).json({ error: "required field(s) missing" });
+          return;
+        }
+        issue[name] = req.body[name];
+      }
+      optionalFields.forEach((name) => (issue[name] = req.body[name] ?? ""));
+      autoGeneratedFields.forEach(
+        (generator, name) => (issue[name] = generator())
+      );
+      if (!projectsIssues[project])
+        projectsIssues[project] = { [issue._id]: { ...issue } };
+      else projectsIssues[project][issue._id] = { ...issue };
+      res.json(issue);
     })
-    
-    .put(function (req, res){
-      let project = req.params.project;
-      
+
+    .put(function (req, res) {
+      const project = req.params.project;
+      if (!project) res.status(400).json({ error: "Project not specified" });
+      const _id = req.body._id;
+      const fields = {};
+      updateFields.forEach((name) => {
+        if (req.body[name]) fields[name] = req.body[name];
+      });
+      if (!_id) res.status(400).json({ error: "missing _id" });
+      else if (!projectsIssues[project][_id])
+        res.status(404).json({ error: "could not update", _id: _id });
+      else if (!Object.entries(fields).length)
+        res.status(400).json({ error: "no update field(s) sent", _id: _id });
+      else {
+        Object.entries(fields).forEach(
+          ([name, value]) => (projectsIssues[project][_id][name] = value)
+        );
+        res.json({ result: "successfully updated", _id: _id });
+      }
     })
-    
-    .delete(function (req, res){
-      let project = req.params.project;
-      
+
+    .delete(function (req, res) {
+      const project = req.params.project;
+      if (!project) {
+        res.status(400).json({ error: "Project not specified" });
+        return;
+      }
+      const _id = req.body._id;
+      if (!_id) res.status(400).json({ error: "missing _id" });
+      else if (!projectsIssues[project][_id])
+        res.status(404).json({ error: "could not delete", _id: _id });
+      else {
+        delete projectsIssues[project][_id];
+        res.json({ result: "successfully deleted", _id: _id });
+      }
     });
-    
 };