Function updateViewInQueue

lib/index-browser.js:8570–8751

(view, opts)

  }

  async function updateViewInQueue(view, opts) {
    // bind the emit function once
    let mapResults;
    let doc;
    let taskId;

    function emit(key, value) {
      const output = {id: doc._id, key: normalizeKey(key)};
      // Don't explicitly store the value unless it's defined and non-null.
      // This saves on storage space, because often people don't use it.
      if (typeof value !== 'undefined' && value !== null) {
        output.value = normalizeKey(value);
      }
      mapResults.push(output);
    }

    const mapFun = mapper(view.mapFun, emit);

    let currentSeq = view.seq || 0;

    function createTask() {
      return view.sourceDB.info().then(function (info) {
        taskId = view.sourceDB.activeTasks.add({
          name: 'view_indexing',
          total_items: info.update_seq - currentSeq,
        });
      });
    }

    function processChange(docIdsToChangesAndEmits, seq) {
      return function () {
        return saveKeyValues(view, docIdsToChangesAndEmits, seq);
      };
    }

    let indexed_docs = 0;
    const progress = {
      view: view.name,
      indexed_docs
    };
    view.sourceDB.emit('indexing', progress);

    const queue = new TaskQueue$1();

    async function processNextBatch() {
      const response = await view.sourceDB.changes({
        return_docs: true,
        conflicts: true,
        include_docs: true,
        style: 'all_docs',
        since: currentSeq,
        limit: opts.changes_batch_size
      });
      const purges = await getRecentPurges();
      return processBatch(response, purges);
    }

    function getRecentPurges() {