Emilio Campa - node web server

index.js

@@ -1 +1,162 @@
+var http = require('http');
+var users = require("./state.js").users;
+var products = require("./state.js").products;
+
+
+var server = http.createServer(messageReceived);
+
+server.listen(8080);
+
+
+
+function messageReceived(req, res) {
+    let toDisplay = "Complete";
+
+    if (req.method === "GET") {
+        toDisplay = getRecordsToDisplayOnGetRequest(req.url);
+        res.writeHead(200, {'Content-Type': 'application/json'});
+        res.write(toDisplay);
+        res.end();
+    }
+    else if (req.method == "PUT") {
+        toDisplay = markElementAsModifiedById(req.url);
+        let httpVerb = 400;
+
+        if (toDisplay) {
+            httpVerb = 204;
+        }
+        res.writeHead(httpVerb, {'Content-Type': 'application/json'});
+        res.write(JSON.stringify(toDisplay));
+        res.end();
+    }
+    else if (req.method == "POST") {
+        let body = [];
+
+        if (req.url == "/users" || req.url == "/products") {
+            req.on('data', (chunk) => {
+                body.push(chunk);
+            }).on('end', () => {
+                body = Buffer.concat(body).toString();
+
+                let element = JSON.parse(body);
+
+                if (req.url == "/users") {
+                    element._id = users.length + 1;
+                    users.push(element);
+                }
+                else {
+                    element._id = products.length + 1;
+                    products.push(element);
+                } 
+
+                toDisplay = JSON.stringify(element);
+
+                res.writeHead(200, {'Content-Type': 'application/json'});
+                res.write(toDisplay);
+                res.end();
+            });
+        }
+        else {
+            toDisplay = JSON.stringify("ERROR: Not a valid element");
+
+            res.writeHead(400, {'Content-Type': 'text/plain'});
+            res.write(toDisplay);
+            res.end();
+        }
+    }
+    else if (req.method == "DELETE") {
+        toDisplay = markElementAsDeletedById(req.url);
+        let httpVerb = 400;
+
+        if (toDisplay) {
+            httpVerb = 200;
+            toDisplay = "deleted";
+        }
+        res.writeHead(httpVerb, {'Content-Type': 'application/json'});
+        res.write(JSON.stringify(toDisplay));
+        res.end();
+    }
+    else {
+        toDisplay = "METHOD NOT ALLOWED";
+        res.writeHead(400, {'Content-Type': 'text/plain'});
+        res.write(toDisplay);
+        res.end();
+    }
+}
+
+
+function markElementAsDeletedById(url) {
+    let success = true;
+    let elements = getElementsFromRequest(url);
+
+    //A single element got returned
+    if (elements && elements.length == null) {
+        elements.isActive = false;
+    }
+    //Either no element or all elements got returned
+    else {
+        success = false;
+    }
+    return success;
+}
+
+
+function markElementAsModifiedById(url) {
+    let success = true;
+    let elements = getElementsFromRequest(url);
+
+    //A single element got returned
+    if (elements && elements.length == null) {
+        elements._modified = true;
+    }
+    //Either no element or all elements got returned
+    else {
+        success = false;
+    }
+    return success;
+}
+
+function getElementsFromRequest(url) {
+    let idToFetchRegEx = /\d+/g;
+    let idToFetch = idToFetchRegEx.exec(url);
+
+    let toReturn;
+
+    if (url.toLowerCase().includes("/users")) {
+
+        if (idToFetch && idToFetch.length > 0) {
+            toReturn = getRecordById(idToFetch.join(), users);
+        }
+        else {
+            toReturn = users;
+        }
+    }
+    else if (url.toLowerCase().includes("/products")) {
+
+        if (idToFetch && idToFetch.length > 0) {
+            toReturn = getRecordById(idToFetch.join(), products);
+        }
+        else {
+            toReturn = products;
+        }
+    }
+    else {
+        toReturn = null;
+    }
+    return toReturn;
+}
+
+
+function getRecordsToDisplayOnGetRequest(url) {
+    return JSON.stringify(getElementsFromRequest(url));
+}
+
+function getRecordById(id, myArray) {
+    let result = myArray.find( element => element._id == id );
+
+    if (result)
+        return result;
+    else
+        return null;
+}
 

state.js

@@ -33,7 +33,7 @@ exports.users = [
 
 exports.products = [
   {
-    "id": 1,
+    "_id": 1,
     "name": "Body Luxuries Sweet Lavender Hand Sanitizer",
     "description": "Makes your hands clean",
     "rating": 2,
@@ -84,7 +84,7 @@ exports.products = [
     ]
   },
   {
-    "id": 2,
+    "_id": 2,
     "name": "Topiramate",
     "description": "A wonderful medicine that makes everything all better",
     "rating": 2,
@@ -115,7 +115,7 @@ exports.products = [
     ]
   },
   {
-    "id": 3,
+    "_id": 3,
     "name": "Almond",
     "description": "A great treat that tastes great",
     "rating": 5,
@@ -138,7 +138,7 @@ exports.products = [
     ]
   },
   {
-    "id": 4,
+    "_id": 4,
     "name": "VYTORIN",
     "description": "Orchard as the place of occurrence of the external cause",
     "rating": 3,
@@ -161,7 +161,7 @@ exports.products = [
     ]
   },
   {
-    "id": 5,
+    "_id": 5,
     "name": "Decolorized Iodine",
     "description": "Kills germs on contact",
     "rating": 1,
@@ -184,7 +184,7 @@ exports.products = [
     ]
   },
   {
-    "id": 6,
+    "_id": 6,
     "name": "Fresh Sugar Honey Tinted Lip Treatment SPF15",
     "description": "Fix those chapped lips. ",
     "rating": 3,
@@ -207,7 +207,7 @@ exports.products = [
     ]
   },
   {
-    "id": 7,
+    "_id": 7,
     "name": "LBel",
     "description": "2-Propanol",
     "rating": 3,
@@ -230,7 +230,7 @@ exports.products = [
     ]
   },
   {
-    "id": 8,
+    "_id": 8,
     "name": "Cholestyramine",
     "description": "Help reduce cholesteral in the system",
     "rating": 3,
@@ -253,7 +253,7 @@ exports.products = [
     ]
   },
   {
-    "id": 9,
+    "_id": 9,
     "name": "Risperidone",
     "description": "cephalospor/oth beta-lactm antibiot, undet, sequela",
     "rating": 1,
@@ -276,7 +276,7 @@ exports.products = [
     ]
   },
   {
-    "id": 10,
+    "_id": 10,
     "name": "MAC",
     "description": "Other Gram-negative sepsis",
     "rating": 2,