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server: Add documentation for code_block_theme

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Elian Doran 2024-11-02 01:39:35 +02:00
parent 4e945583a1
commit 1554e25283
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34
src/services/code_block_theme.ts
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@ -1,12 +1,31 @@
/**
* @module
*
* Manages the server-side functionality of the code blocks feature, mostly for obtaining the available themes for syntax highlighting.
*/
import fs from "fs";
import themeNames from "./code_block_theme_names.json" with { type: "json" }
import { t } from "i18next";
/**
* Represents a color scheme for the code block syntax highlight.
*/
interface ColorTheme {
/** The ID of the color scheme which should be stored in the options. */
val: string;
/** A user-friendly name of the theme. The name is already localized. */
title: string;
}
/**
* Returns all the supported syntax highlighting themes for code blocks, in groups.
*
* The return value is an object where the keys represent groups in their human-readable name (e.g. "Light theme")
* and the values are an array containing the information about every theme.
*
* @returns the supported themes, grouped.
*/
export function listSyntaxHighlightingThemes() {
const path = "node_modules/@highlightjs/cdn-assets/styles";
const systemThemes = readThemesFromFileSystem(path);
@ -22,6 +41,14 @@ export function listSyntaxHighlightingThemes() {
}
}
/**
* Reads all the predefined themes by listing all minified CSSes from a given directory.
*
* The theme names are mapped against a known list in order to provide more descriptive names such as "Visual Studio 2015 (Dark)" instead of "vs2015".
*
* @param path the path to read from. Usually this is the highlight.js `styles` directory.
* @returns the list of themes.
*/
function readThemesFromFileSystem(path: string): ColorTheme[] {
return fs.readdirSync(path)
.filter((el) => el.endsWith(".min.css"))
@ -40,6 +67,13 @@ function readThemesFromFileSystem(path: string): ColorTheme[] {
});
}
/**
* Groups a list of themes by dark or light themes. This is done simply by checking whether "Dark" is present in the given theme, otherwise it's considered a light theme.
* This generally only works if the theme has a known human-readable name (see {@link #readThemesFromFileSystem()})
*
* @param listOfThemes the list of themes to be grouped.
* @returns the grouped themes by light or dark.
*/
function groupThemesByLightOrDark(listOfThemes: ColorTheme[]) {
const darkThemes = [];
const lightThemes = [];