91 lines
2.2 KiB
JavaScript
91 lines
2.2 KiB
JavaScript
'use strict';
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const photoIngestQueue = require('./photoIngestQueue');
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let epoch = null;
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async function beginGlobalPhotoScan(db) {
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if (!epoch || !epoch.active) {
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const created = {
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active: true,
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baselineDone: 0,
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enumerationsInProgress: 0,
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initPromise: null,
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};
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epoch = created;
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created.initPromise = photoIngestQueue
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.getPhotoIngestQueueCounts(db)
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.then(counts => {
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created.baselineDone = Number(counts.done || 0);
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})
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.catch(err => {
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if (epoch === created) created.active = false;
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throw err;
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});
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}
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const current = epoch;
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current.enumerationsInProgress++;
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try {
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await current.initPromise;
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} catch (err) {
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current.enumerationsInProgress = Math.max(
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0, current.enumerationsInProgress - 1
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);
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throw err;
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}
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}
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function finishGlobalPhotoScan() {
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if (epoch) {
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epoch.enumerationsInProgress = Math.max(
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0, epoch.enumerationsInProgress - 1
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);
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}
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}
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async function getGlobalPhotoScanStatus(db) {
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const counts = await photoIngestQueue.getPhotoIngestQueueCounts(db);
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const pending = Number(counts.pending || 0);
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const processing = Number(counts.processing || 0);
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const done = Number(counts.done || 0);
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const errors = Number(counts.error || 0);
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const remaining = pending + processing;
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const totalCurrent = pending + processing + done + errors;
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let current;
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let total;
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let percent;
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let baselineDone = done;
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if (epoch && epoch.active) {
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baselineDone = epoch.baselineDone;
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total = Math.max(0, totalCurrent - baselineDone);
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current = Math.max(0, (done - baselineDone) + errors);
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percent = total <= 0
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? 100
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: Math.max(0, Math.min(100, Math.round(current / total * 100)));
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// Chiude il ciclo solo quando tutte le richieste di scansione
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// hanno terminato l'accodamento e la coda è vuota.
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if (epoch.enumerationsInProgress === 0 && remaining === 0) {
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epoch.active = false;
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}
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} else {
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total = totalCurrent;
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current = totalCurrent;
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percent = 100;
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}
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return {
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pending, processing, done, errors, remaining,
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current, total, percent, baselineDone,
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};
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}
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module.exports = {
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beginGlobalPhotoScan,
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finishGlobalPhotoScan,
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getGlobalPhotoScanStatus,
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};
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