127 lines
4.9 KiB
JavaScript
127 lines
4.9 KiB
JavaScript
define([
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'underscore',
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'utils',
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'settings',
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'eventMgr',
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'fileMgr',
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'diff_match_patch_uncompressed',
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'jsondiffpatch',
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], function(_, utils, settings, eventMgr, fileMgr, diff_match_patch, jsondiffpatch) {
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function Provider(providerId, providerName) {
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this.providerId = providerId;
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this.providerName = providerName;
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this.isPublishEnabled = true;
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}
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// Parse and check a JSON discussion list
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Provider.prototype.parseDiscussionList = function(discussionListJSON) {
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try {
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var discussionList = JSON.parse(discussionListJSON);
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_.each(discussionList, function(discussion, discussionIndex) {
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if(
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(discussion.discussionIndex != discussionIndex) ||
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(!_.isNumber(discussion.selectionStart)) ||
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(!_.isNumber(discussion.selectionEnd))
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) {
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throw 'invalid';
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}
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discussion.commentList.forEach(function(comment) {
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if(
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(!_.isString(comment.author)) ||
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(!_.isString(comment.content))
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) {
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throw 'invalid';
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}
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});
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});
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return discussionList;
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}
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catch(e) {
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}
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};
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Provider.prototype.serializeContent = function(content, discussionList) {
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if(_.size(discussionList) !== 0) {
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return content + '<!--se_discussion_list:' + discussionList + '-->';
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}
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return content;
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};
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Provider.prototype.parseSerializedContent = function(content) {
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var discussionList = '{}';
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var discussionExtractor = /<!--se_discussion_list:([\s\S]+)-->$/.exec(content);
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if(discussionExtractor && this.parseDiscussionList(discussionExtractor[1])) {
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content = content.substring(0, discussionExtractor.index);
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discussionList = discussionExtractor[1];
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}
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return {
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content: content,
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discussionList: discussionList
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};
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};
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var diffMatchPatch = new diff_match_patch();
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var jsonDiffPatch = jsondiffpatch.create({
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objectHash: function(obj) {
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return JSON.stringify(obj);
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},
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arrays: {
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detectMove: false,
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},
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textDiff: {
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minLength: 9999999
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}
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});
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var merge = settings.conflictMode == 'merge';
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Provider.prototype.merge = function(localContent, remoteContent, localTitle, remoteTitle, localDiscussionList, remoteDiscussionList, syncAttributes) {
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// Local/Remote CRCs
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var localContentCRC = utils.crc32(localContent);
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var localTitleCRC = utils.crc32(localTitle);
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var localDiscussionListCRC = utils.crc32(localDiscussionList);
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var remoteContentCRC = utils.crc32(remoteContent);
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var remoteTitleCRC = utils.crc32(remoteTitle);
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var remoteDiscussionListCRC = utils.crc32(remoteDiscussionList);
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// Check content
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var contentChanged = localContent != remoteContent;
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var localContentChanged = syncAttributes.contentCRC != localContentCRC;
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var remoteContentChanged = syncAttributes.contentCRC != remoteContentCRC;
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var contentConflict = contentChanged && localContentChanged && remoteContentChanged;
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// Check title
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syncAttributes.titleCRC = syncAttributes.titleCRC || localTitleCRC; // Not synchronized with Dropbox
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var titleChanged = localTitle != remoteTitle;
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var localTitleChanged = syncAttributes.titleCRC != localTitleCRC;
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var remoteTitleChanged = syncAttributes.titleCRC != remoteTitleCRC;
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var titleConflict = titleChanged && localTitleChanged && remoteTitleChanged;
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// Check discussionList
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var discussionListChanged = localDiscussionList != remoteDiscussionList;
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var localDiscussionListChanged = syncAttributes.discussionListCRC != localDiscussionListCRC;
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var remoteDiscussionListChanged = syncAttributes.discussionListCRC != remoteDiscussionListCRC;
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var discussionListConflict = discussionListChanged && localDiscussionListChanged && remoteDiscussionListChanged;
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// Conflict detection
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if(
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(!merge && (contentConflict || titleConflict || discussionListConflict)) ||
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(contentConflict && syncAttributes.content === undefined) ||
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(titleConflict && syncAttributes.title === undefined) ||
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(discussionListConflict && syncAttributes.discussionList === undefined)
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) {
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fileMgr.createFile(localTitle + " (backup)", localContent);
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eventMgr.onMessage('Conflict detected on "' + localTitle + '". A backup has been created locally.');
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}
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else {
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if(contentConflict === true) {
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var patch = diffMatchPatch.patch_make(syncAttributes.content, localContent);
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}
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}
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};
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return Provider;
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});
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