mirror of
https://github.com/overleaf/overleaf.git
synced 2024-11-07 20:31:06 -05:00
90 lines
3 KiB
JavaScript
90 lines
3 KiB
JavaScript
/* eslint-disable
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no-unmodified-loop-condition,
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no-unused-vars,
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*/
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// TODO: This file was created by bulk-decaffeinate.
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// Fix any style issues and re-enable lint.
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/*
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* decaffeinate suggestions:
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* DS101: Remove unnecessary use of Array.from
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* DS102: Remove unnecessary code created because of implicit returns
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* DS207: Consider shorter variations of null checks
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* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
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*/
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let ProjectIterator;
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const Heap = require("heap");
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module.exports = (ProjectIterator =
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(ProjectIterator = class ProjectIterator {
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constructor(packs, before, getPackByIdFn) {
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this.before = before;
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this.getPackByIdFn = getPackByIdFn;
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const byEndTs = (a,b) => (b.meta.end_ts - a.meta.end_ts) || (a.fromIndex - b.fromIndex);
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this.packs = packs.slice().sort(byEndTs);
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this.queue = new Heap(byEndTs);
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}
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next(callback) {
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// what's up next
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// console.log ">>> top item", iterator.packs[0]
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const iterator = this;
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const { before } = this;
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const { queue } = iterator;
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const opsToReturn = [];
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let nextPack = iterator.packs[0];
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let lowWaterMark = (nextPack != null ? nextPack.meta.end_ts : undefined) || 0;
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let nextItem = queue.peek();
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// console.log "queue empty?", queue.empty()
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// console.log "nextItem", nextItem
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// console.log "nextItem.meta.end_ts", nextItem?.meta.end_ts
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// console.log "lowWaterMark", lowWaterMark
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while ((before != null) && ((nextPack != null ? nextPack.meta.start_ts : undefined) > before)) {
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// discard pack that is outside range
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iterator.packs.shift();
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nextPack = iterator.packs[0];
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lowWaterMark = (nextPack != null ? nextPack.meta.end_ts : undefined) || 0;
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}
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if ((queue.empty() || ((nextItem != null ? nextItem.meta.end_ts : undefined) <= lowWaterMark)) && (nextPack != null)) {
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// retrieve the next pack and populate the queue
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return this.getPackByIdFn(nextPack.project_id, nextPack.doc_id, nextPack._id, function(err, pack) {
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if (err != null) { return callback(err); }
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iterator.packs.shift(); // have now retrieved this pack, remove it
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// console.log "got pack", pack
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for (const op of Array.from(pack.pack)) {
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// console.log "adding op", op
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if ((before == null) || (op.meta.end_ts < before)) {
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op.doc_id = nextPack.doc_id;
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op.project_id = nextPack.project_id;
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queue.push(op);
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}
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}
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// now try again
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return iterator.next(callback);
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});
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}
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// console.log "nextItem", nextItem, "lowWaterMark", lowWaterMark
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while ((nextItem != null) && ((nextItem != null ? nextItem.meta.end_ts : undefined) > lowWaterMark)) {
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opsToReturn.push(nextItem);
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queue.pop();
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nextItem = queue.peek();
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}
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// console.log "queue empty?", queue.empty()
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// console.log "nextPack", nextPack?
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if (queue.empty() && (nextPack == null)) { // got everything
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iterator._done = true;
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}
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return callback(null, opsToReturn);
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}
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done() {
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return this._done;
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}
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}));
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