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import { lowlight } from 'lowlight/lib/core';
import { __, sprintf } from '~/locale';
import CODE_BLOCK_LANGUAGES from '../constants/code_block_languages';
import languageLoader from './highlight_js_language_loader';
const codeBlockLanguageLoader = {
lowlight,
allLanguages: CODE_BLOCK_LANGUAGES,
findOrCreateLanguageBySyntax(value, isDiagram) {
const lowercaseValue = value?.toLowerCase() || 'plaintext';
return (
this.allLanguages.find(
({ syntax, variants }) =>
syntax === lowercaseValue || variants?.toLowerCase().split(', ').includes(lowercaseValue),
) || {
syntax: lowercaseValue,
label: sprintf(isDiagram ? __(`Diagram (%{language})`) : __(`Custom (%{language})`), {
language: lowercaseValue,
}),
}
);
},
filterLanguages(value) {
if (!value) return this.allLanguages;
const lowercaseValue = value?.toLowerCase() || '';
return this.allLanguages.filter(
({ syntax, label, variants }) =>
syntax.toLowerCase().includes(lowercaseValue) ||
label.toLowerCase().includes(lowercaseValue) ||
variants?.toLowerCase().includes(lowercaseValue),
);
},
isLanguageLoaded(language) {
return this.lowlight.registered(language);
},
loadLanguageFromInputRule(match) {
const { syntax } = this.findOrCreateLanguageBySyntax(match[1]);
this.loadLanguage(syntax);
return { language: syntax };
},
async loadLanguage(languageName) {
if (this.isLanguageLoaded(languageName)) return false;
try {
const { default: language } = await languageLoader[languageName]();
this.lowlight.registerLanguage(languageName, language);
return true;
} catch {
return false;
}
},
};
export default codeBlockLanguageLoader;
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