1 files changed, 40 insertions, 0 deletions
diff --git a/src/utils.ts b/src/utils.ts
new file mode 100644
index 0000000..40e985e
--- /dev/null
+++ b/src/utils.ts
@@ -0,0 +1,40 @@
+export class Utils {
+    static createKey(keyLength: number){
+        let keyspace: String = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+        let text = '';
+        let index;
+        for (let i = 0; i < keyLength; i++)
+        {
+            index = Math.floor(Math.random() * keyspace.length);
+            text += keyspace.charAt(index);
+        }
+        return text;
+    }
+
+    static toUTF8Array(str) {
+        let utf8 = [];
+        for (var i=0; i < str.length; i++) {
+            let charcode = str.charCodeAt(i);
+            if (charcode < 0x80) utf8.push(charcode);
+            else if (charcode < 0x800) {
+                utf8.push(0xc0 | (charcode >> 6), 
+                          0x80 | (charcode & 0x3f));
+            }
+            else if (charcode < 0xd800 || charcode >= 0xe000) {
+                utf8.push(0xe0 | (charcode >> 12), 
+                          0x80 | ((charcode>>6) & 0x3f), 
+                          0x80 | (charcode & 0x3f));
+            }
+            // surrogate pair
+            else {
+                i++;
+                charcode = ((charcode&0x3ff)<<10)|(str.charCodeAt(i)&0x3ff)
+                utf8.push(0xf0 | (charcode >>18), 
+                          0x80 | ((charcode>>12) & 0x3f), 
+                          0x80 | ((charcode>>6) & 0x3f), 
+                          0x80 | (charcode & 0x3f));
+            }
+        }
+        return utf8;
+    }
+}
+\ No newline at end of file