Remove LZString compression for data storage

2 files changed, 11 insertions, 17 deletions

diff --git a/lib/models/note.js b/lib/models/note.js
index 5727046c..81de991f 100644
--- a/lib/models/note.js
+++ b/lib/models/note.js
@@ -124,8 +124,6 @@ module.exports = function (sequelize, DataTypes) {
                                     var body = fs.readFileSync(filePath, 'utf8');
                                     var contentLength = body.length;
                                     var title = Note.parseNoteTitle(body);
-                                    body = LZString.compressToBase64(body);
-                                    title = LZString.compressToBase64(title);
                                     if (fsModifiedTime.isAfter(dbModifiedTime) && note.content !== body) {
                                         note.update({
                                             title: title,
@@ -135,14 +133,14 @@ module.exports = function (sequelize, DataTypes) {
                                             sequelize.models.Revision.saveNoteRevision(note, function (err, revision) {
                                                 if (err) return _callback(err, null);
                                                 // update authorship on after making revision of docs
-                                                var patch = dmp.patch_fromText(LZString.decompressFromBase64(revision.patch));
+                                                var patch = dmp.patch_fromText(revision.patch);
                                                 var operations = Note.transformPatchToOperations(patch, contentLength);
-                                                var authorship = note.authorship ? JSON.parse(LZString.decompressFromBase64(note.authorship)) : [];
+                                                var authorship = note.authorship;
                                                 for (var i = 0; i < operations.length; i++) {
                                                     authorship = Note.updateAuthorshipByOperation(operations[i], null, authorship);
                                                 }
                                                 note.update({
-                                                    authorship: LZString.compressToBase64(JSON.stringify(authorship))
+                                                    authorship: JSON.stringify(authorship)
                                                 }).then(function (note) {
                                                     return callback(null, note.id);
                                                 }).catch(function (err) {
@@ -264,10 +262,7 @@ module.exports = function (sequelize, DataTypes) {
                 return markdown.substr(0, 100).replace(/(?:\r\n|\r|\n)/g, ' ');
             },
             decodeTitle: function (title) {
-                var decodedTitle = LZString.decompressFromBase64(title);
-                if (decodedTitle) title = decodedTitle;
-                else title = 'Untitled';
-                return title;
+                return title ? title : 'Untitled';
             },
             generateWebTitle: function (title) {
                 title = !title || title == "Untitled" ? "HackMD - Collaborative markdown notes" : title + " - HackMD";
@@ -496,8 +491,8 @@ module.exports = function (sequelize, DataTypes) {
                     if (Note.checkFileExist(filePath)) {
                         var fsCreatedTime = moment(fs.statSync(filePath).ctime);
                         body = fs.readFileSync(filePath, 'utf8');
-                        note.title = LZString.compressToBase64(Note.parseNoteTitle(body));
-                        note.content = LZString.compressToBase64(body);
+                        note.title = Note.parseNoteTitle(body);
+                        note.content = body;
                         if (filePath !== config.defaultnotepath) {
                             note.createdAt = fsCreatedTime;
                         }
diff --git a/lib/models/revision.js b/lib/models/revision.js
index 8b8eba94..6f44cf1d 100644
--- a/lib/models/revision.js
+++ b/lib/models/revision.js
@@ -2,7 +2,6 @@
 
 // external modules
 var Sequelize = require("sequelize");
-var LZString = require('lz-string');
 var async = require('async');
 var moment = require('moment');
 var childProcess = require('child_process');
@@ -214,7 +213,7 @@ module.exports = function (sequelize, DataTypes) {
                         Revision.create({
                             noteId: note.id,
                             lastContent: note.content,
-                            length: LZString.decompressFromBase64(note.content).length,
+                            length: note.content.length,
                             authorship: note.authorship
                         }).then(function (revision) {
                             Revision.finishSaveNoteRevision(note, revision, callback);
@@ -223,8 +222,8 @@ module.exports = function (sequelize, DataTypes) {
                         });
                     } else {
                         var latestRevision = revisions[0];
-                        var lastContent = LZString.decompressFromBase64(latestRevision.content || latestRevision.lastContent);
-                        var content = LZString.decompressFromBase64(note.content);
+                        var lastContent = latestRevision.content || latestRevision.lastContent;
+                        var content = note.content;
                         sendDmpWorker({
                             msg: 'create patch',
                             lastDoc: lastContent,
@@ -244,9 +243,9 @@ module.exports = function (sequelize, DataTypes) {
                             } else {
                                 Revision.create({
                                     noteId: note.id,
-                                    patch: LZString.compressToBase64(patch),
+                                    patch: patch,
                                     content: note.content,
-                                    length: LZString.decompressFromBase64(note.content).length,
+                                    length: note.content.length,
                                     authorship: note.authorship
                                 }).then(function (revision) {
                                     // clear last revision content to reduce db size