added sessions support

shared/page.ts

@@ -0,0 +1,7 @@
+export function isSessionPage() {
+    return document.URL.indexOf("/sessions") != -1;
+}
+
+export function isRootPage() {
+    return document.URL.indexOf("/sessions") == -1;
+}

shared/session-api.ts

@@ -0,0 +1,90 @@
+var apiUrl = "https://codeeditor-api.davidssoft.com/";
+
+function getSessionId() {
+    var localstorageSessionId = localStorage.getItem("sessionId");
+
+    if (!localstorageSessionId) {
+        return setNewSession();
+    }
+    else {
+        var expiration = localStorage.getItem("sessionIdExpiration");
+
+        if (expiration) {
+            var expirationDate = new Date(expiration);
+
+            if (dateDiff(expirationDate, new Date()) > 120) {
+                return setNewSession();
+            }
+            else {
+                localStorage.setItem("sessionIdExpiration", (new Date()).toString());
+                return localstorageSessionId;
+            }
+
+        }
+        else {
+            return setNewSession();
+        }
+    }
+}
+
+function setNewSession() {
+    var newSessionId = uuidv4();
+    localStorage.setItem("sessionIdExpiration", (new Date()).toString());
+    localStorage.setItem("sessionId", newSessionId);
+
+    return newSessionId;
+}
+
+function dateDiff(startTime: Date, endTime: Date) {
+    var difference = endTime.getTime() - startTime.getTime(); // This will give difference in milliseconds
+    var resultInMinutes = Math.round(difference / 60000);
+    return resultInMinutes;
+}
+
+function uuidv4() {
+    //@ts-ignore
+    return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c =>
+      (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
+    );
+  }
+
+export function getSessions(onGet: (sessions: any[]) => void) {
+    fetch(apiUrl + "session/all").then((res) => {
+        res.json().then((jsonRes) => {
+            onGet(jsonRes as any);
+        });
+    });
+}
+
+export function getSessionData(sessionId: string, onGet: (sessions: any[]) => void) {
+    fetch(apiUrl + "session/data/" + sessionId, { method: "GET" }).then((res) => {
+        res.json().then((jsonRes) => {
+            onGet(jsonRes as any);
+        });
+    });
+}
+
+export function setSessionData(language: string, input: any, onSet?: () => void) {
+    var type = 0;
+
+    if (language.toLowerCase() == "javascript") {
+        type = 0;
+    }
+    else if (language.toLowerCase() == "html") {
+        type = 1;
+    }
+    else if (language.toLowerCase() == "css") {
+        type = 2;
+    }
+
+    fetch(apiUrl + "session/set", { 
+        method: "POST", 
+        headers: {
+            "Content-Type": "application/json",
+        },
+        body: JSON.stringify({ sessionId: getSessionId(), timestamp: new Date(), type: type, data: input }) }).then((res) => {
+        if (onSet) {
+            onSet();
+        }
+    });
+}