Citation bot

GitHub repository details

• 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.

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:

• Citation Bot, 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. Single pages can be GETed.
• Citation expander (https://en.wikipedia.org/wiki/MediaWiki:Gadget-citations.js) + gadgetapi.php. This 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.

Web Interface vs. Gadget: Slow Mode Differences

The Citation Bot has two main user-facing interfaces with different performance characteristics:

Web Interface (index.html + process_page.php)

• Default mode: Thorough mode (slow mode enabled via checkbox, checked by default)
• Slow mode operations: Searches for new bibcodes and expands URLs via external APIs
• Use case: Users who want comprehensive citation expansion and can wait longer
• Timeout limit: Typically completes for all pages, even if the web interface times out

Citation Expander Gadget (gadgetapi.php)

• Default mode: Fast mode only (slow mode is always disabled)
• Operations performed:
  • ✓ Expands PMIDs, DOIs, arXiv, JSTOR IDs to full citations
  • ✓ Adds missing citation parameters (authors, title, journal, date, pages, etc.)
  • ✓ Cleans up citation formatting and fixes template types
• Operations skipped:
  • ✗ Searching for new bibcodes
  • ✗ Expanding URLs via Zotero
• Why fast mode only: The gadget is designed for quick, in-browser citation expansion. Slow mode operations (bibcode searches and URL expansions) can exceed the web browser's connection timeout limit, causing the gadget to fail.
• Use case: Quick citation cleanup and expansion while editing Wikipedia articles

Note: Both interfaces perform core citation expansion effectively. The gadget sacrifices some thoroughness for speed and reliability to provide a better in-browser editing experience.

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
• MathTools.php: converts MathML notation to LaTeX for Wikipedia citations
• setup.php: sets up needed functions, requires most of the other files listed here
• miscFns.php: a variety of functions
• URLtools.php: normalize urls and extract information from urls
• TextTools.php: string manipulation functions including converting to wiki
• WebTools.php: things unique to the web interface
• API*.php: sets up needed functions for expanding pmid/doi/url/etc
• 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.
• WikiThings.php: Handles comments, nowiki, 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.
• A good balance between splitting funcionality into single files and avoiding too many files should be maintained.
• The code is generally NOT 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 >= 8.4.

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 go-rwx env.php

To run the bot as a webservice from WM Toolforge:

become citations[-dev]
webservice stop
webservice --backend=kubernetes php8.4 start

Or for testing in the shell:

webservice --backend=kubernetes php8.4 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:2.3.0. 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 expects a file of such name to contain a single line of | separated page names. This code requires PHP 8.4 with optional packages included: php84-mbstring php84-sockets php84-opcache php84-openssl php84-xmlrpc php84-gettext php84-curl php84-intl php84-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

Running in web browser locally

One way to set up a localhost that runs in your web browser is to use Docker. Install Docker Desktop on your computer, open a shell, cd to the root directory of this repo, type docker compose up -d, then visit https://localhost:8081.

To install Composer dependencies, start the container as noted above, then type docker exec -it citation-bot-php-1 composer update.

To do most bot tasks, you'll need to create an env.php file and populate it with API keys. See env.php.example in the root.

Submitting issues

Where issues require consensus on Wikipedia policy, they are discussed on the Citation Bot Talk Page. Most other issues should also be discussed there. The issues on GitHub are primarily for the developers internal use.