Update to move authorship calculation code to note model and support update authorship after making revision of docs
This commit is contained in:
Wu Cheng-Han
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d23ced1fba
@ -11,11 +11,16 @@ var shortId = require('shortid');
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var Sequelize = require("sequelize");
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var async = require('async');
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var moment = require('moment');
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var DiffMatchPatch = require('diff-match-patch');
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var dmp = new DiffMatchPatch();
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// core
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var config = require("../config.js");
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var logger = require("../logger.js");
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//ot
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var ot = require("../ot/index.js");
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// permission types
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var permissionTypes = ["freely", "editable", "locked", "private"];
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@ -115,6 +120,7 @@ module.exports = function (sequelize, DataTypes) {
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var fsModifiedTime = moment(fs.statSync(filePath).mtime);
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var dbModifiedTime = moment(note.lastchangeAt || note.createdAt);
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var body = fs.readFileSync(filePath, 'utf8');
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var contentLength = body.length;
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var title = Note.parseNoteTitle(body);
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body = LZString.compressToBase64(body);
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title = LZString.compressToBase64(title);
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@ -126,7 +132,20 @@ module.exports = function (sequelize, DataTypes) {
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}).then(function (note) {
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sequelize.models.Revision.saveNoteRevision(note, function (err, revision) {
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if (err) return _callback(err, null);
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// update authorship on after making revision of docs
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var patch = dmp.patch_fromText(LZString.decompressFromBase64(revision.patch));
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var operations = Note.transformPatchToOperations(patch, contentLength);
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var authorship = note.authorship ? JSON.parse(LZString.decompressFromBase64(note.authorship)) : [];
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for (var i = 0; i < operations.length; i++) {
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authorship = Note.updateAuthorshipByOperation(operations[i], null, authorship);
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}
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note.update({
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authorship: authorship
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}).then(function (note) {
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return callback(null, note.id);
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}).catch(function (err) {
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return _callback(err, null);
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});
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});
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}).catch(function (err) {
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return _callback(err, null);
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@ -247,6 +266,162 @@ module.exports = function (sequelize, DataTypes) {
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_meta.slideOptions = meta.slideOptions;
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}
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return _meta;
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},
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updateAuthorshipByOperation: function (operation, userId, authorships) {
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var index = 0;
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var timestamp = Date.now();
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for (var i = 0; i < operation.length; i++) {
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var op = operation[i];
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if (ot.TextOperation.isRetain(op)) {
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index += op;
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} else if (ot.TextOperation.isInsert(op)) {
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var opStart = index;
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var opEnd = index + op.length;
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var inserted = false;
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// authorship format: [userId, startPos, endPos, createdAt, updatedAt]
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if (authorships.length <= 0) authorships.push([userId, opStart, opEnd, timestamp, timestamp]);
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else {
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for (var j = 0; j < authorships.length; j++) {
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var authorship = authorships[j];
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if (!inserted) {
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var nextAuthorship = authorships[j + 1] || -1;
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if (nextAuthorship != -1 && nextAuthorship[1] >= opEnd || j >= authorships.length - 1) {
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if (authorship[1] < opStart && authorship[2] > opStart) {
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// divide
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var postLength = authorship[2] - opStart;
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authorship[2] = opStart;
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authorship[4] = timestamp;
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authorships.splice(j + 1, 0, [userId, opStart, opEnd, timestamp, timestamp]);
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authorships.splice(j + 2, 0, [authorship[0], opEnd, opEnd + postLength, authorship[3], timestamp]);
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j += 2;
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inserted = true;
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} else if (authorship[1] >= opStart) {
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authorships.splice(j, 0, [userId, opStart, opEnd, timestamp, timestamp]);
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j += 1;
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inserted = true;
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} else if (authorship[2] <= opStart) {
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authorships.splice(j + 1, 0, [userId, opStart, opEnd, timestamp, timestamp]);
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j += 1;
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inserted = true;
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}
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}
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}
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if (authorship[1] >= opStart) {
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authorship[1] += op.length;
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authorship[2] += op.length;
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}
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}
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}
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index += op.length;
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} else if (ot.TextOperation.isDelete(op)) {
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var opStart = index;
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var opEnd = index - op;
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if (operation.length == 1) {
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authorships = [];
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} else if (authorships.length > 0) {
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for (var j = 0; j < authorships.length; j++) {
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var authorship = authorships[j];
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if (authorship[1] >= opStart && authorship[1] <= opEnd && authorship[2] >= opStart && authorship[2] <= opEnd) {
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authorships.splice(j, 1);
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j -= 1;
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} else if (authorship[1] < opStart && authorship[1] < opEnd && authorship[2] > opStart && authorship[2] > opEnd) {
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authorship[2] += op;
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authorship[4] = timestamp;
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} else if (authorship[2] >= opStart && authorship[2] <= opEnd) {
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authorship[2] = opStart;
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authorship[4] = timestamp;
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} else if (authorship[1] >= opStart && authorship[1] <= opEnd) {
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authorship[1] = opEnd;
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authorship[4] = timestamp;
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}
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if (authorship[1] >= opEnd) {
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authorship[1] += op;
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authorship[2] += op;
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}
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}
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}
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index += op;
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}
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}
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// merge
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for (var j = 0; j < authorships.length; j++) {
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var authorship = authorships[j];
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for (var k = j + 1; k < authorships.length; k++) {
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var nextAuthorship = authorships[k];
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if (nextAuthorship && authorship[0] === nextAuthorship[0] && authorship[2] === nextAuthorship[1]) {
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var minTimestamp = Math.min(authorship[3], nextAuthorship[3]);
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var maxTimestamp = Math.max(authorship[3], nextAuthorship[3]);
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authorships.splice(j, 1, [authorship[0], authorship[1], nextAuthorship[2], minTimestamp, maxTimestamp]);
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authorships.splice(k, 1);
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j -= 1;
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break;
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}
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}
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}
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// clear
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for (var j = 0; j < authorships.length; j++) {
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var authorship = authorships[j];
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if (!authorship[0]) {
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authorships.splice(j, 1);
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j -= 1;
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}
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}
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return authorships;
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},
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transformPatchToOperations: function (patch, contentLength) {
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var operations = [];
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if (patch.length > 0) {
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// calculate original content length
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for (var j = patch.length - 1; j >= 0; j--) {
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var p = patch[j];
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for (var i = 0; i < p.diffs.length; i++) {
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var diff = p.diffs[i];
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switch(diff[0]) {
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case 1: // insert
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contentLength -= diff[1].length;
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break;
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case -1: // delete
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contentLength += diff[1].length;
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break;
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}
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}
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}
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// generate operations
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var bias = 0;
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var lengthBias = 0;
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for (var j = 0; j < patch.length; j++) {
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var operation = [];
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var p = patch[j];
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var currIndex = p.start1;
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var currLength = contentLength - bias;
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for (var i = 0; i < p.diffs.length; i++) {
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var diff = p.diffs[i];
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switch(diff[0]) {
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case 0: // retain
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if (i == 0) // first
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operation.push(currIndex + diff[1].length);
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else if (i != p.diffs.length - 1) // mid
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operation.push(diff[1].length);
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else // last
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operation.push(currLength + lengthBias - currIndex);
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currIndex += diff[1].length;
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break;
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case 1: // insert
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operation.push(diff[1]);
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lengthBias += diff[1].length;
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currIndex += diff[1].length;
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break;
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case -1: // delete
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operation.push(-diff[1].length);
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bias += diff[1].length;
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currIndex += diff[1].length;
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break;
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}
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}
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operations.push(operation);
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}
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}
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return operations;
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}
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},
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hooks: {
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101
lib/realtime.js
101
lib/realtime.js
@ -642,106 +642,7 @@ function operationCallback(socket, operation) {
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}
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}
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// save authorship
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var index = 0;
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var authorships = note.authorship;
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var timestamp = Date.now();
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for (var i = 0; i < operation.length; i++) {
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var op = operation[i];
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if (ot.TextOperation.isRetain(op)) {
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index += op;
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} else if (ot.TextOperation.isInsert(op)) {
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var opStart = index;
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var opEnd = index + op.length;
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var inserted = false;
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// authorship format: [userId, startPos, endPos, createdAt, updatedAt]
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if (authorships.length <= 0) authorships.push([userId, opStart, opEnd, timestamp, timestamp]);
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else {
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for (var j = 0; j < authorships.length; j++) {
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var authorship = authorships[j];
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if (!inserted) {
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var nextAuthorship = authorships[j + 1] || -1;
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if (nextAuthorship != -1 && nextAuthorship[1] >= opEnd || j >= authorships.length - 1) {
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if (authorship[1] < opStart && authorship[2] > opStart) {
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// divide
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var postLength = authorship[2] - opStart;
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authorship[2] = opStart;
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authorship[4] = timestamp;
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authorships.splice(j + 1, 0, [userId, opStart, opEnd, timestamp, timestamp]);
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authorships.splice(j + 2, 0, [authorship[0], opEnd, opEnd + postLength, authorship[3], timestamp]);
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j += 2;
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inserted = true;
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} else if (authorship[1] >= opStart) {
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authorships.splice(j, 0, [userId, opStart, opEnd, timestamp, timestamp]);
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j += 1;
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inserted = true;
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} else if (authorship[2] <= opStart) {
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authorships.splice(j + 1, 0, [userId, opStart, opEnd, timestamp, timestamp]);
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j += 1;
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inserted = true;
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}
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}
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}
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if (authorship[1] >= opStart) {
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authorship[1] += op.length;
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authorship[2] += op.length;
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}
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}
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}
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index += op.length;
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} else if (ot.TextOperation.isDelete(op)) {
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var opStart = index;
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var opEnd = index - op;
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if (operation.length == 1) {
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authorships = [];
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} else if (authorships.length > 0) {
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for (var j = 0; j < authorships.length; j++) {
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var authorship = authorships[j];
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if (authorship[1] >= opStart && authorship[1] <= opEnd && authorship[2] >= opStart && authorship[2] <= opEnd) {
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authorships.splice(j, 1);
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j -= 1;
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} else if (authorship[1] < opStart && authorship[1] < opEnd && authorship[2] > opStart && authorship[2] > opEnd) {
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authorship[2] += op;
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authorship[4] = timestamp;
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} else if (authorship[2] >= opStart && authorship[2] <= opEnd) {
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authorship[2] = opStart;
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authorship[4] = timestamp;
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} else if (authorship[1] >= opStart && authorship[1] <= opEnd) {
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authorship[1] = opEnd;
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authorship[4] = timestamp;
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}
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if (authorship[1] >= opEnd) {
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authorship[1] += op;
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authorship[2] += op;
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}
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}
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}
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index += op;
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}
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}
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// merge
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for (var j = 0; j < authorships.length; j++) {
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var authorship = authorships[j];
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for (var k = j + 1; k < authorships.length; k++) {
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var nextAuthorship = authorships[k];
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if (nextAuthorship && authorship[0] === nextAuthorship[0] && authorship[2] === nextAuthorship[1]) {
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var minTimestamp = Math.min(authorship[3], nextAuthorship[3]);
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var maxTimestamp = Math.max(authorship[3], nextAuthorship[3]);
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authorships.splice(j, 1, [authorship[0], authorship[1], nextAuthorship[2], minTimestamp, maxTimestamp]);
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authorships.splice(k, 1);
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j -= 1;
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break;
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}
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}
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}
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// clear
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for (var j = 0; j < authorships.length; j++) {
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var authorship = authorships[j];
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if (!authorship[0]) {
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authorships.splice(j, 1);
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j -= 1;
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}
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}
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note.authorship = authorships;
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note.authorship = models.Note.updateAuthorshipByOperation(operation, userId, note.authorship);
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}
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function connection(socket) {
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