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# Plang
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<!-- md-toc-begin -->
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* [About](#about)
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* [The Plang Language](#the-plang-language)
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* [`plang` command](#plang-command)
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* [`plangrepl` command](#plangrepl-command)
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* [PBot built-in Plang functions](#pbot-built-in-plang-functions)
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* [factget](#factget)
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* [factset](#factset)
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* [factappend](#factappend)
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* [userget](#userget)
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<!-- md-toc-end -->
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## About
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This Plang plugin provides a scripting interface to PBot. It has access to PBot
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internal APIs and state.
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## The Plang Language
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The scripting language is [Plang](https://github.com/pragma-/Plang). It was
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written specifically for PBot, but is powerful enough to be used as a general-purpose
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scripting language embedded into any Perl application.
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This document describes PBot's Plang plugin. To learn how to use the Plang scripting
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language, see the [Plang documentation](https://github.com/pragma-/Plang/blob/master/README.md).
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## `plang` command
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Use the `plang` command to run a Plang script.
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Usage: `plang <code>`
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## `plangrepl` command
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The `plangrepl` command is identical to the `plang` command, except the environment
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is preserved in-between commands and the types of values is output along with the value.
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2020-07-23 21:37:34 +02:00
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## PBot built-in Plang functions
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[Plang](https://github.com/pragma-/Plang) lets you add custom built-in functions.
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Several have been added for PBot; they are described here.
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### factget
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factget(channel, keyword, meta = "action")
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Use the `factget` function to retrieve metadata from factoids.
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The `factget` function takes three paramaters: `channel`, `keyword` and `meta`. The `meta`
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parameter can be omitted and will default to `"action"`.
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The `factget` function returns a `String` containing the value of the factoid metadata key.
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### factset
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factset(channel, keyword, text)
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Use the `factset` function to set the `action` metadata value for factoids.
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The `factset` function takes three parameters: `channel`, `keyword` and `text`.
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The `factset` function returns a `String` containing the value of `text`.
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### factappend
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factappend(channel, keyword, text)
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Use the `factappend` function to append text to the `action` metadata for factoids.
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The `factappend` function takes three parameters: `channel`, `keyword` and `text`.
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The `factappend` function returns a `String` containing the value of factoid's `action`
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metadata with `text` appended.
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### userget
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userget(name)
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Use the `userget` function to retrieve user metadata.
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The `userget` function takes one parameter: `name`.
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The `userget` function returns a `Map` containing all the metadata of the user, or
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`nil` if there is no user matching `name`.
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See the [Plang Map documentation](https://github.com/pragma-/Plang#map) for a refresher on using Plang maps.
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Examples:
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<pragma-> !plang userget('pragma-')
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<PBot> { channels: "global", hostmasks: "*!*\@unaffiliated/pragmatic-chaos", botowner: 1 }
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<pragma-> !plang userget('pragma-')['botowner']
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<PBot> 1
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