Citation bot

GitHub repository details

There are one to two main branches of the bot:

• The master code is implemented at https://citations.toolforge.org/, and is intended for public use.
• When needed, the development branch is intended for major restructuring and testing, and is implemented at https://citations-dev.toolforge.org/ .

Overview

This is some basic documentation about what this bot is and how some of the parts connect.

This is more properly a bot-gadget-tool combination. The parts are:

• DOIBot, found in index.html (web frontend) and process_page.php (information is POSTed to this and it does the citation expansion; backend). This automatically posts a new page revision with expanded citations and thus requires a bot account. All activity takes place on Tool Labs.
• Citation expander (https://en.wikipedia.org/wiki/MediaWiki:Gadget-citations.js) + gadgetapi.php. This is comprises an Ajax front-end in the on-wiki gadget and a PHP backend API.
• generate_template.php creates the wiki reference given an identifier (for example: https://citations.toolforge.org/generate_template.php?doi=10.1109/SCAM.2013.6648183)

Bugs and requested changes are listed here: https://en.wikipedia.org/wiki/User_talk:Citation_bot.

Structure

Basic structure of a Citation bot script:

• the env.php that defines configuration constants (you can create it from env.php.example)
• the setup.php that sets up the functions needed (usually, you don't need to modify this file)
• the Page functions to fetch/expand/post the page's text

A quick tour of the main files:

• constants.php: constants defined
• WikipediaBot.php: functions to facilitate HTTP access to the Wikipedia API.
• NameTools.php: defines name functions
• setup.php: sets up needed functions, requires most of the other files listed here
• expandFns.php: a variety of functions
• apiFunctions.php: sets up needed functions for expanding pmid/doi/etc
• Zotero.php: URL expansion related functions organized in a static class

Class files:

• Page.php: Represents an individual page to expand citations on. Key methods are Page::get_text_from(), Page::expand_text(), and Page::write().
• Template.php: most of the actual expansion happens here. Template::add_if_new() is generally (but not always) used to add parameters to the updated template; Template::tidy() cleans up the template, but may add parameters as well and have side effects.
• Comment.php: Handles comments, nokwiki, etc. tags
• Parameter.php: contains information about template parameter names, values, and metadata, and methods to parse template parameters.

Style and structure notes

Constants and definitions should be provided in constants.php. Classes should be in individual files. The code is generally written densely. Beware assignments in conditionals, one-line if/foreach/else statements, and action taking place through method calls that take place in assignments or equality checks. Also beware the difference between else if and elseif.

Deployment

The bot requires PHP >= 8.2.

To run the bot from a new environment, you will need to create an env.php file (if one doesn't already exist) that sets the needed authentication tokens as environment variables. To do this, you can rename env.php.example to env.php, set the variables in the file, and then make sure the file is not world readable or writable:

chmod o-rwx env.php

To run the bot as a webservice from WM Toolforge:

become citations[-dev]
webservice stop
webservice --backend=kubernetes php8.2 start

Or for testing in the shell:

webservice --backend=kubernetes php8.2 shell

Before entering the k8s shell, it may be necessary to install phpunit (as wget is not available in the k8s shell).

Running on the command line

In order to run on the command line one needs OAuth tokens as documented in env.php.example (there are additional API keys that are needed to run some functions). Change BOT_USER_AGENT in setup.php to something else. Use composer to composer require mediawiki/oauthclient:dev-master. Then the bot can be run such as:

/usr/bin/php ./process_page.php "Covid Watch|Water|COVID-19_apps" --slow --savetofiles

The command line tool will also accept page_list.txt and page_list2.txt as page names. In those cases the bot expect a file of such name to contain a single line of | seperated page names. This code requires PHP 8.2 with optional packages included: php82-mbstring php82-sockets php82-opcache php82-openssl php82-xmlrpc php82-gettext php82-curl php82-intl php82-iconv

Command line parameters:

• --slow - retrieve bibcodes and expand urls
• --savetofiles - save processed pages as files (with .md extension) instead of submitting them to Wikipedia