1 files changed, 60 insertions, 0 deletions
diff --git a/lib/note.js b/lib/note.js
new file mode 100644
index 00000000..1212e1a6
--- /dev/null
+++ b/lib/note.js
@@ -0,0 +1,60 @@
+//note
+//external modules
+var LZString = require('lz-string');
+var marked = require('marked');
+var cheerio = require('cheerio');
+
+//others
+var db = require("./db.js");
+
+//public
+var note = {
+    checkNoteIdValid: checkNoteIdValid,
+    checkNoteExist: checkNoteExist,
+    getNoteTitle: getNoteTitle
+};
+
+function checkNoteIdValid(noteId) {
+    try {
+        //console.log(noteId);
+        var id = LZString.decompressFromBase64(noteId);
+        if (!id) return false;
+        var uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
+        var result = id.match(uuidRegex);
+        if (result && result.length == 1)
+            return true;
+        else
+            return false;
+    } catch (err) {
+        console.error(err);
+        return false;
+    }
+}
+
+function checkNoteExist(noteId) {
+    try {
+        //console.log(noteId);
+        var id = LZString.decompressFromBase64(noteId);
+        db.readFromDB(id, function (err, result) {
+            if (err) return false;
+            return true;
+        });
+    } catch (err) {
+        console.error(err);
+        return false;
+    }
+}
+
+//get title
+function getNoteTitle(body) {
+    var $ = cheerio.load(marked(body));
+    var h1s = $("h1");
+    var title = "";
+    if (h1s.length > 0)
+        title = h1s.first().text();
+    else
+        title = "Untitled";
+    return title;
+}
+
+module.exports = note;
+\ No newline at end of file