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#!/usr/bin/node
/* jshint esnext:true */
'use strict';
var amqp = require("amqplib"),
Seq = require("sequelize"),
snakeCaseKeys = require("snakecase-keys"),
item_name_map = require("../orm/items");
var RABBITMQ_URI = process.env.RABBITMQ_URI || "amqp://localhost",
DATABASE_URI = process.env.DATABASE_URI || "sqlite:///db.sqlite",
BATCHSIZE = process.env.PROCESSOR_BATCH || 50 * (6 + 5), // objects
IDLE_TIMEOUT = process.env.PROCESSOR_IDLETIMEOUT || 500; // ms
(async () => {
let seq = new Seq(DATABASE_URI),
model = require("../orm/model")(seq, Seq),
rabbit = await amqp.connect(RABBITMQ_URI),
ch = await rabbit.createChannel();
let queue = [],
timer = undefined;
let item_db_map = {}; // "Halcyon Potion" to id
/* recreate for debugging
await seq.query("SET FOREIGN_KEY_CHECKS=0");
await seq.sync({force: true});
*/
await seq.sync();
// TODO instead of object, use Map
await model.Item.findAll()
.map((item) => item_db_map[item.name] = item.id);
await ch.assertQueue("process", {durable: true});
await ch.assertQueue("compile", {durable: true});
// as long as the queue is filled, msg are not ACKed
// server sends as long as there are less than `prefetch` unACKed
await ch.prefetch(BATCHSIZE);
ch.consume("process", async (msg) => {
queue.push(msg);
// fill queue until batchsize or idle
if (timer === undefined)
timer = setTimeout(process, IDLE_TIMEOUT)
if (queue.length == BATCHSIZE)
await process();
}, { noAck: false });
async function process() {
console.log("processing batch", queue.length);
// clean up to allow processor to accept while we wait for db
let msgs = queue.slice();
queue = [];
clearTimeout(timer);
timer = undefined;
// BEGIN
let transaction = await seq.transaction({ autocommit: false });
// helper to convert API response into flat JSON
// db structure is (almost) 1:1 the API structure
// so we can insert the flat API response as-is
function flatten(obj) {
let attrs = obj.attributes || {},
stats = attrs.stats || {},
o = Object.assign({}, obj, attrs, stats);
o.api_id = o.id; // rename
delete o.id;
delete o.type;
delete o.attributes;
delete o.stats;
delete o.relationships;
return o;
}
// UPSERT
try {
// apigrabber sends to queue with a custom "type" so processor can filter
// and insert players and matches seperately
let matches = msgs.filter((m) => m.properties.type == "match").map((m) => JSON.parse(m.content)),
players = msgs.filter((m) => m.properties.type == "player").map((m) => {
let pl = flatten(JSON.parse(m.content));
pl.shard_id = m.properties.headers.shard; // TODO workaround for empty API field
return pl;
});
await Promise.all(matches.map(async (match) => {
console.log("processing match", match.id);
// flatten jsonapi nested response into our db structure-like shape
// also, push missing fields and snakecasify
match.rosters = match.rosters.map((roster) => {
roster.matchApiId = match.id;
roster.shardId = match.shardId;
roster.createdAt = match.createdAt;
roster.participants = roster.participants.map((participant) => {
participant.shardId = roster.shardId;
participant.rosterApiId = roster.id;
participant.createdAt = roster.createdAt;
participant.playerApiId = participant.player.id;
// API bug fixes
// items on AFK is `null` not `{}`
participant.attributes.stats.itemGrants = participant.attributes.stats.itemGrants || {};
participant.attributes.stats.itemSells = participant.attributes.stats.itemSells || {};
participant.attributes.stats.itemUses = participant.attributes.stats.itemUses || {};
// jungle_kills is `null` in BR
participant.attributes.stats.jungleKills = participant.attributes.stats.jungleKills || 0;
// map items: names/id -> name -> db
let itms = [],
item_use = (arr, action) =>
arr.map((item) => { return {
participant_api_id: participant.id,
item_id: item_db_map[item_name_map[item]],
action: action
} }),
item_arr_from_obj = (obj) =>
[].concat(... // 3 flatten
Object.entries(obj).map( // 1 map over (key, value)
(tuple) => Array(tuple[1]).fill(tuple[0]))) // 2 create Array [key] * value
itms = itms.concat(item_use(participant.attributes.stats.items, "final"));
itms = itms.concat(item_use(item_arr_from_obj(participant.attributes.stats.itemGrants), "grant"));
itms = itms.concat(item_use(item_arr_from_obj(participant.attributes.stats.itemUses), "use"));
itms = itms.concat(item_use(item_arr_from_obj(participant.attributes.stats.itemSells), "sell"));
// for debugging:
let items_missing_name = [].concat(...
Object.keys(participant.attributes.stats.itemGrants),
participant.attributes.stats.items)
.filter((i) => Object.keys(item_name_map).indexOf(i) == -1);
if (items_missing_name.length > 0) console.error("missing API name -> name mapping for", items_missing_name);
let items_missing_db = [].concat(...
Object.keys(participant.attributes.stats.itemGrants),
participant.attributes.stats.items)
.filter((i) => Object.keys(item_db_map).indexOf(item_name_map[i]) == -1);
if (items_missing_db.length > 0) console.error("missing name -> DB ID mapping for", items_missing_db);
// redefine participant.items for our custom map
participant.attributes.stats.items = itms;
participant.player = snakeCaseKeys(flatten(participant.player));
return snakeCaseKeys(flatten(participant));
});
return snakeCaseKeys(flatten(roster));
});
match.assets = match.assets.map((asset) => {
asset.matchApiId = match.id;
asset.shardId = match.shardId;
return snakeCaseKeys(flatten(asset));
});
match = snakeCaseKeys(flatten(match));
// upsert match
await model.Match.upsert(match, {
include: [ model.Roster, model.Asset ],
transaction: transaction
});
// upsert children
// before, add foreign keys and other missing information (shardId)
await Promise.all(match.rosters.map(async (roster) => {
await model.Roster.upsert(roster, {
include: [ model.Participant ],
transaction: transaction
});
await Promise.all(roster.participants.map(async (participant) => {
await model.Participant.upsert(participant, {
include: [ model.Player ],
transaction: transaction
});
await Promise.all(participant.items.map(async (item) =>
await model.ParticipantItemUse.upsert(item, {
include: [ model.Participant ],
transaction: transaction
})
));
}));
}));
await Promise.all(match.assets.map(async (asset) => {
await model.Asset.upsert(asset, { transaction: transaction });
}));
}));
// players are upserted seperately
// because they are duplicated among a page of matches
// as provided by apigrabber
console.log("processing", players.length, "players");
await Promise.all(players.map(async (p) => await model.Player.upsert(snakeCaseKeys(p), { transaction: transaction }) ));
// COMMIT
await transaction.commit();
console.log("acking batch");
await ch.ack(msgs.pop(), true); // ack all messages until the last
// notify web
await Promise.all(players.map(async (p) => await ch.publish("amq.topic", p.name, new Buffer("process_commit")) ));
// notify compiler
await Promise.all(matches.map(async (m) => {
await Promise.all(m.rosters.map(async (r) => {
await Promise.all(r.participants.map(async (p) => {
await ch.sendToQueue("compile", new Buffer(JSON.stringify(p)), {
persistent: true,
type: "participant"
});
}));
}));
}));
await Promise.all(players.map(async (p) =>
await ch.sendToQueue("compile", new Buffer(JSON.stringify(p)), {
persistent: true,
type: "player"
})
));
} catch (err) { // TODO catch only SQL error, also catch errors in the promises
console.error(err);
await transaction.rollback();
await ch.nack(msgs.pop(), true, true); // nack all messages until the last and requeue
// TODO don't requeue broken records
}
}
})();
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