Jump to 0.3.1

lib/note.js

@@ -1,22 +1,56 @@
 //note
 //external modules
+var mongoose = require('mongoose');
+var Schema = mongoose.Schema;
 var LZString = require('lz-string');
 var marked = require('marked');
 var cheerio = require('cheerio');
+var shortId = require('shortid');
 
 //others
 var db = require("./db.js");
+var logger = require("./logger.js");
+
+//permission types
+permissionTypes = ["freely", "editable", "locked"];
+
+// create a note model
+var model = mongoose.model('note', {
+    id: String,
+    shortid: {
+        type: String,
+        unique: true,
+        default: shortId.generate
+    },
+    permission: {
+        type: String,
+        enum: permissionTypes
+    },
+    viewcount: {
+        type: Number,
+        default: 0
+    },
+    updated: Date,
+    created: Date
+});
 
 //public
 var note = {
+    model: model,
+    findNote: findNote,
+    newNote: newNote,
+    findOrNewNote: findOrNewNote,
     checkNoteIdValid: checkNoteIdValid,
     checkNoteExist: checkNoteExist,
-    getNoteTitle: getNoteTitle
+    getNoteTitle: getNoteTitle,
+    generateWebTitle: generateWebTitle,
+    increaseViewCount: increaseViewCount,
+    updatePermission: updatePermission
 };
 
 function checkNoteIdValid(noteId) {
     try {
-        //console.log(noteId);
+        //logger.info(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;
@@ -26,21 +60,21 @@ function checkNoteIdValid(noteId) {
         else
             return false;
     } catch (err) {
-        console.error(err);
+        logger.error(err);
         return false;
     }
 }
 
 function checkNoteExist(noteId) {
     try {
-        //console.log(noteId);
+        //logger.info(noteId);
         var id = LZString.decompressFromBase64(noteId);
         db.readFromDB(id, function (err, result) {
             if (err) return false;
             return true;
         });
     } catch (err) {
-        console.error(err);
+        logger.error(err);
         return false;
     }
 }
@@ -50,11 +84,118 @@ function getNoteTitle(body) {
     var $ = cheerio.load(marked(body));
     var h1s = $("h1");
     var title = "";
-    if (h1s.length > 0)
+    if (h1s.length > 0 && h1s.first().text().split('\n').length == 1)
         title = h1s.first().text();
     else
         title = "Untitled";
     return title;
 }
 
+//generate note web page title
+function generateWebTitle(title) {
+    title = !title || title == "Untitled" ? "HackMD - Collaborative notes" : title + " - HackMD";
+    return title;
+}
+
+function findNote(id, callback) {
+    model.findOne({
+        $or: [
+            {
+                id: id
+            },
+            {
+                shortid: id
+            }
+        ]
+    }, function (err, note) {
+        if (err) {
+            logger.error('find note failed: ' + err);
+            callback(err, null);
+        }
+        if (!err && note) {
+            callback(null, note);
+        } else {
+            logger.error('find note failed: ' + err);
+            callback(err, null);
+        };
+    });
+}
+
+function newNote(id, permission, callback) {
+    var note = new model({
+        id: id,
+        permission: permission,
+        updated: Date.now(),
+        created: Date.now()
+    });
+    note.save(function (err) {
+        if (err) {
+            logger.error('new note failed: ' + err);
+            callback(err, null);
+        } else {
+            logger.info("new note success: " + note.id);
+            callback(null, note);
+        };
+    });
+}
+
+function findOrNewNote(id, permission, callback) {
+    findNote(id, function (err, note) {
+        if (err || !note) {
+            newNote(id, permission, function (err, note) {
+                if (err) {
+                    logger.error('find or new note failed: ' + err);
+                    callback(err, null);
+                } else {
+                    callback(null, note);
+                }
+            });
+        } else {
+            if (!note.permission) {
+                note.permission = permission;
+                note.updated = Date.now();
+                note.save(function (err) {
+                    if (err) {
+                        logger.error('add note permission failed: ' + err);
+                        callback(err, null);
+                    } else {
+                        logger.info("add note permission success: " + note.id);
+                        callback(null, note);
+                    };
+                });
+            } else {
+                callback(null, note);
+            }
+        }
+    });
+}
+
+function increaseViewCount(note, callback) {
+    note.viewcount++;
+    note.updated = Date.now();
+    note.save(function (err) {
+        if (err) {
+            logger.error('increase note viewcount failed: ' + err);
+            callback(err, null);
+        } else {
+            logger.info("increase note viewcount success: " + note.id);
+            callback(null, note);
+        };
+    });
+}
+
+function updatePermission(note, permission, callback) {
+    note.permission = permission;
+    note.updated = Date.now();
+    note.save(function (err) {
+        if (err) {
+            logger.error('update note permission failed: ' + err);
+            callback(err, null);
+        } else {
+            logger.info("update note permission success: " + note.id);
+            callback(null, note);
+        };
+    });
+}
+
 module.exports = note;