Impl GET calls

aufgabe3/app.js

@@ -22,26 +22,113 @@ app.use(express.static(path.join(__dirname, "public")));
 
 const csv = require('csvtojson')
 
+var json;
+
 csv()
     .fromFile("world_data.csv")
     .then((jsonObj) => {
+        json = jsonObj;
         console.log(jsonObj);
-        /**
-         * [
-         * 	{a:"1", b:"2", c:"3"},
-         * 	{a:"4", b:"5". c:"6"}
-         * ]
-         */
     })
 
-// Async / await usage
-//const jsonArray = await csv().fromFile(csvFilePath);
-
-
 /**************************************************************************
 ********************** handle HTTP METHODS ***********************
 **************************************************************************/
 
+// ------------------------------ GET ------------------------------
+app.get("/items", function (req, res) {
+    console.log(json);
+    res.send(json);
+});
+
+app.get("/items/:id", function (req, res) {
+    var requested_id = parseInt(req.params.id);
+    var answer = [];
+
+    for (var i = 0; i < json.length; i++) {
+        if (json[i].id == requested_id) {
+            answer = [json[i]];
+        }
+    }
+
+    res.send(answer);
+});
+
+app.get("/items/:id1/:id2", function (req, res) {
+    var first_requested_id = parseInt(req.params.id1);
+    var second_requested_id = parseInt(req.params.id2);
+    var answer = [];
+
+    // check that first id is bigger than 0
+    // and the second one is the bigger one
+    if (first_requested_id >= 0 && second_requested_id > first_requested_id) {
+        var enable_push = false;
+
+        for (i; i < json.length; i++) {
+            // enable push when the first id is found
+            if (parseInt(json[i]["id"]) == first_requested_id) {
+                enable_push = true;
+            }
+
+            // push key when enabled
+            if (enable_push) {
+                answer.push(json[i]);
+            }
+
+            // leave when second id is found
+            if (parseInt(json[i]["id"]) == second_requested_id) {
+                break;
+            }
+        }
+    }
+
+    res.send(answer);
+});
+
+app.get("/properties", function (req, res) {
+    var answer = [];
+
+    for (var key in json[0]) {
+        answer.push(key);
+    }
+
+    res.send(answer);
+});
+
+app.get("/properties/:num", function (req, res) {
+    let num = parseInt(req.params.num);
+    var answer = [];
+
+    var i = 0;
+
+    for (var key in json[0]) {
+        if (i == num) {
+            answer = [key];
+            break;
+        }
+
+        i++;
+    }
+
+    res.send(answer);
+})
+
+// ----------------------------- POST ------------------------------
+app.post("/items", function (req, res) {
+    var answer = bla();
+    res.send(answer);
+});
+
+// ---------------------------- DELETE -----------------------------
+app.delete("/items", function (req, res) {
+    var answer = bla();
+    res.send(answer);
+});
+
+app.delete("/items/id", function (req, res) {
+    var answer = bla();
+    res.send(answer);
+});
 
 // DO NOT CHANGE!
 // bind server to port