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xivanalysis

Build Dependency status Discord

Automated performance analysis and suggestion platform for Final Fantasy XIV: Stormblood, using data sourced from FF Logs.

Table of Contents

Getting Started

Before starting, you will need:

Once you've set those up, you'll need to pull down the codebase. If you plan to contribute code, you'll need to create a fork of the project first, and use your fork's URL in place of the main project's when cloning.

# Clone the project
git clone https://github.com/xivanalysis/xivanalysis.git
cd xivanalysis

NOTE: Drop past our Discord channel before you get too into it, have a chat! Duping up on implementations is never fun.

If you are working with a fork, I would highly suggest configuring an upstream remote, and making sure you sync it down reasonably frequently - you can check the #automations channel on Discord to get an idea of what's been changed.

You've now got the primary codebase locally, next you'll need to download all the project's dependencies. Please do use yarn for this - using npm will ignore the lockfile, and potentially pull down untested updates.

yarn

While yarn is running, copy the .env.local.example file in the project root, and call it .env.local. Make a few changes in it:

  • Replace TODO_FINAL_DEPLOY_URL with https://www.fflogs.com/v1/.
  • Replace INSERT_API_KEY_HERE with your public fflogs api key. If you don't have one, you can get yours here.

NOTE: If you are also configuring the server locally, you can use [server url]/proxy/fflogs/ as the base url, and omit the api key.

Once that's done, you're ready to go! To start the development server, just run

yarn start

If you would like to compile a production copy of the assets (for example, to be served when testing the server), run

yarn build

Structure of the parser

The parser is the meat of xivanalysis. Its primary job is to orchestrate modules, which read event data and output the final analysis.

Module groups

The modules are split into a number of groups:

  • core: Unsurprisingly, the core system modules. These provide commonly-used functionality (see the section on dependency below), as well as job-agnostic modules such as "Don't die".
  • jobs/[job]: Each supported job has its own group of modules, that provide specialised analysis/information for that job.
  • bosses/[boss]: Like jobs, some bosses have groups of modules, usually used to analyse unique fight mechanics, or provide concrete implementations that fflogs does not currently provide itself.

Modules from core are loaded first, followed by bosses, then jobs.

Each group of modules is contained in its own folder, alongside any other required files. All groups also require an index.js, which provides a reference to all the modules that should be loaded. These index files are referenced in parser/AVAILABLE_MODULES.js

Modules

With the parser orchestrating the modules, it's down to the modules themselves to analyse the data and provide the final output.

Each module should be in charge of analysing a single statistic or feature, so as to keep them as small and digestible as reasonably possible. To aid in this, modules are able to 'depend' on others, and directly access any data they may expose. Modules are guaranteed to run before anything that depends on them - this also implicitly prevents circular dependencies from being formed (an error will be thrown).

For more details, check out the API Reference below, and have a look through the core and jobs/smn modules.

API Reference

Module

All modules should extend this class at some point in their hierarchy. It provides helpers to handle events, and provides a standard interface for the parser to work with.

Properties

static handle

Required. The name that should be used to reference this module throughout the system/dependencies. Without this set, the module will break during build minification.

static title

The name that should be shown above any output the module generates. If not set, it will default to the module's handle, with the first letter capitalised.

static dependencies

An array of module handles that this module depends on. Modules listed here will always be executed before the current module, and will be available on the this.<handle> instance property.

static displayOrder

A number used to control the position the module should have in the final output. The core Module file exports the DISPLAY_ORDER const with a few defaults.

Methods

addHook(event[, filter], callback)

Add an event hook.

event should be the name of the event you wish to listen for. 'all' can be passed to listen for all events.

filter, if specified, is an object specifying properties that must be matched by an event for the hook to fire. Keys can be anything that the event may have. There are a few special keys and values available to the filter:

  • Setting the value of a property to an array will check if any of the values match the event.
  • abilityId: <value> is shorthand for ability: {guid: <value>}
  • by: <value> and to: <value> are shorthand for sourceID and targetID respectively, and support the following additional values:
    • 'player': The ID of the current player
    • 'pet': The IDs of all the current player's pets.

callback is the function that should be called when an event (optionally passing the filter) is run. It will receive the full event object as its first parameter.

An object representing the added hook is returned, that can be later used to modify it. The actual structure of this hook object should not be relied upon.

output()

Override this function to provide output for the user. Any markup returned will be displayed on the analysis page, under a header defined by static title.

Return false (the default implementation does this) to prevent generating output for the module.

normalise(events)

Override this function if the module absolutely needs to process events before the official 'parse', such as to add missing applybuff events. Avoid if addHook could be used instead.

events is an array of every event that is about to be parsed.

Return value should be the events array, with any required modifications made to it. Failing to return this will prevent the parser from parsing any events at all.

getErrorContext(source, error, event)

Override this function to customize the information that the module provides for automatic error reporting. This function is called when an error occurs in event hooks or the output() method on the faulting module as well as all modules that module depends on.

source is either event or output error is the error that occurred event is the error that was being processed when the error occurred, if applicable

If this function is not overridden or if this function returns undefined, primitive values will be scraped from the module and uploaded with the error report.

Parser

The core parser object, orchestrating the modules and providing meta data about the fight. All modules have access to an instance of this via this.parser.

Properties

report, fight, player

The full report metadata object, and the specific fight and player object from it for the current parse, respectively. The data in these is direct from FFLogs, check your networking tab to see the structure.

currentTimestamp

The timestamp of the event currently being parsed in ms. Note that timestamps do not start at 0. Subtract fight.start_time to get a relative timestamp

fightDuration

The remaining duration in the fight (yes, I'm aware it's badly named), in ms.

fightFriendlies

An array of friendly actors that took part in the fight currently being parsed.

Methods

fabricateEvent(event[, trigger])

Trigger an event throughout the system.

event should be the event object being called. A type property must be defined for this do anything. If not specified, timestamp will be set to the current timestamp.

byPlayer(event[, playerId]), toPlayer(event[, playerId])

Checks if the specified event was by/to the specified player. If playerId is not set, the current user will be used.

byPlayerPet(event[, playerId]), toPlayerPet(event[, playerId])

The same as their xxPlayer counterparts, but check if the event was by/to one of the specified player's pets.

formatDuration(duration[, secondPrecision])

Formats the specified duration (in ms) as a MM:SS string. If under 60s, will display seconds with specified precision (default 2 decimal places).

formatTimestamp(timestamp[, secondPrecision])

The result of formatDuration for the duration of the fight up until the specified timestamp.

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Automated performance analysis and suggestion platform for Final Fantasy XIV: Stormblood.

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