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srap/src/queued-database-api.js

37 lines
1.3 KiB
JavaScript

"use strict";
const Promise = require("bluebird");
const consumable = require("@joepie91/consumable");
const syncpipe = require("syncpipe");
const createMutationAPIWrapper = require("./mutation-api/wrapper");
module.exports = function (state) {
const createDatabaseMutationAPI = require("./mutation-api/database")(state);
return function createDatabaseQueue(context) {
let databaseMutationAPI = createDatabaseMutationAPI(context);
let mutationAPI = createMutationAPIWrapper(context, databaseMutationAPI);
let queue = consumable([]);
return {
api: syncpipe(Object.keys(mutationAPI), [
(_) => _.map((method) => [ method, function() { queue.peek().push([ method, arguments ]); } ]),
(_) => Object.fromEntries(_)
]),
execute: function () {
if (!queue.peek().some((method) => method[0] === "updateMetadata")) {
// Doing an updateMetadata call is necessary to mark a task 'completed', so we inject a dummy call that doesn't actually change the metadata itself
// FIXME: Split apart 'markTaskCompleted' and 'updateMetadata' queries so that this hack is no longer necessary
queue.peek().push([ "updateMetadata", [ (data) => data ]]);
}
return Promise.each(queue.consume(), ([ method, args ]) => {
return mutationAPI[method](... args);
});
}
};
};
};