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/*
This is a repair tool. It rebuilds an old pad at a new pad location up to a
known "good" revision.
*/
if(process.argv.length != 4 && process.argv.length != 5) {
console.error("Use: node bin/repairPad.js $PADID $REV [$NEWPADID]");
process.exit(1);
}
var npm = require("../src/node_modules/npm");
var async = require("../src/node_modules/async");
var ueberDB = require("../src/node_modules/ueberDB");
var padId = process.argv[2];
var newRevHead = process.argv[3];
var newPadId = process.argv[4] || padId + "-rebuilt";
var db, oldPad, newPad, settings;
var AuthorManager, ChangeSet, Pad, PadManager;
async.series([
function(callback) {
npm.load({}, function(err) {
if(err) {
console.error("Could not load NPM: " + err)
process.exit(1);
} else {
callback();
}
})
},
function(callback) {
// Get a handle into the database
db = require('../src/node/db/DB');
db.init(callback);
}, function(callback) {
PadManager = require('../src/node/db/PadManager');
Pad = require('../src/node/db/Pad').Pad;
// Get references to the original pad and to a newly created pad
// HACK: This is a standalone script, so we want to write everything
// out to the database immediately. The only problem with this is
// that a driver (like the mysql driver) can hardcode these values.
db.db.db.settings = {cache: 0, writeInterval: 0, json: true};
// Validate the newPadId if specified and that a pad with that ID does
// not already exist to avoid overwriting it.
if (!PadManager.isValidPadId(newPadId)) {
console.error("Cannot create a pad with that id as it is invalid");
process.exit(1);
}
PadManager.doesPadExists(newPadId, function(err, exists) {
if (exists) {
console.error("Cannot create a pad with that id as it already exists");
process.exit(1);
}
});
PadManager.getPad(padId, function(err, pad) {
oldPad = pad;
newPad = new Pad(newPadId);
callback();
});
}, function(callback) {
// Clone all Chat revisions
var chatHead = oldPad.chatHead;
for(var i = 0, curHeadNum = 0; i <= chatHead; i++) {
db.db.get("pad:" + padId + ":chat:" + i, function (err, chat) {
db.db.set("pad:" + newPadId + ":chat:" + curHeadNum++, chat);
console.log("Created: Chat Revision: pad:" + newPadId + ":chat:" + curHeadNum);
});
}
callback();
}, function(callback) {
// Rebuild Pad from revisions up to and including the new revision head
AuthorManager = require("../src/node/db/AuthorManager");
Changeset = require("ep_etherpad-lite/static/js/Changeset");
// Author attributes are derived from changesets, but there can also be
// non-author attributes with specific mappings that changesets depend on
// and, AFAICT, cannot be recreated any other way
newPad.pool.numToAttrib = oldPad.pool.numToAttrib;
for(var curRevNum = 0; curRevNum <= newRevHead; curRevNum++) {
db.db.get("pad:" + padId + ":revs:" + curRevNum, function(err, rev) {
if (rev.meta) {
throw "The specified revision number could not be found.";
}
var newRevNum = ++newPad.head;
var newRevId = "pad:" + newPad.id + ":revs:" + newRevNum;
db.db.set(newRevId, rev);
AuthorManager.addPad(rev.meta.author, newPad.id);
newPad.atext = Changeset.applyToAText(rev.changeset, newPad.atext, newPad.pool);
console.log("Created: Revision: pad:" + newPad.id + ":revs:" + newRevNum);
if (newRevNum == newRevHead) {
callback();
}
});
}
}, function(callback) {
// Add saved revisions up to the new revision head
console.log(newPad.head);
var newSavedRevisions = [];
for(var i in oldPad.savedRevisions) {
savedRev = oldPad.savedRevisions[i]
if (savedRev.revNum <= newRevHead) {
newSavedRevisions.push(savedRev);
console.log("Added: Saved Revision: " + savedRev.revNum);
}
}
newPad.savedRevisions = newSavedRevisions;
callback();
}, function(callback) {
// Save the source pad
db.db.set("pad:"+newPadId, newPad, function(err) {
console.log("Created: Source Pad: pad:" + newPadId);
newPad.saveToDatabase();
callback();
});
}
], function (err) {
if(err) throw err;
else {
console.info("finished");
process.exit(0);
}
});
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