@maniascript/mslint/dist/lib/rules/max-lines.js

ManiaScript linter

import {} from '../linter/rule.js';
import { FunctionDeclaration, LabelDeclaration, Main } from '@maniascript/parser';
const DEFAULT_MAXIMUM = 1000;
export const maxLines = {
    meta: {
        id: 'max-lines',
        description: 'Enforce a maximum number of lines in three contexts: function, label and main',
        recommended: true,
        settings: {
            maximum: {
                function: DEFAULT_MAXIMUM,
                label: DEFAULT_MAXIMUM,
                main: DEFAULT_MAXIMUM
            }
        }
    },
    create(context) {
        let functionMaximumLinesNb = DEFAULT_MAXIMUM;
        let labelMaximumLinesNb = DEFAULT_MAXIMUM;
        let mainMaximumLinesNb = DEFAULT_MAXIMUM;
        if (typeof context.settings['maximum'] === 'number') {
            functionMaximumLinesNb = context.settings['maximum'];
            labelMaximumLinesNb = context.settings['maximum'];
            mainMaximumLinesNb = context.settings['maximum'];
        }
        else if (typeof context.settings['maximum'] === 'object' && context.settings['maximum'] !== null) {
            const maximum = context.settings['maximum'];
            if ('function' in maximum && typeof maximum.function === 'number')
                functionMaximumLinesNb = maximum.function;
            if ('label' in maximum && typeof maximum.label === 'number')
                labelMaximumLinesNb = maximum.label;
            if ('main' in maximum && typeof maximum.main === 'number')
                mainMaximumLinesNb = maximum.main;
        }
        function reportTooManyLines(node, maximumLinesNb) {
            const linesNb = node.source.loc.end.line - node.source.loc.start.line + 1;
            if (linesNb > maximumLinesNb) {
                if (node instanceof FunctionDeclaration) {
                    context.report(node, `Function '${node.name.name}()' has too many lines (${linesNb.toString()} > ${maximumLinesNb.toString()})`);
                }
                else if (node instanceof LabelDeclaration) {
                    context.report(node, `Label '***${node.name.name}***' has too many lines (${linesNb.toString()} > ${maximumLinesNb.toString()})`);
                }
                else if (node instanceof Main) {
                    context.report(node, `Function 'main()' has too many lines (${linesNb.toString()} > ${maximumLinesNb.toString()})`);
                }
            }
        }
        return {
            'FunctionDeclaration:exit': (node) => {
                if (node instanceof FunctionDeclaration) {
                    reportTooManyLines(node, functionMaximumLinesNb);
                }
            },
            'LabelDeclaration:exit': (node) => {
                if (node instanceof LabelDeclaration) {
                    reportTooManyLines(node, labelMaximumLinesNb);
                }
            },
            'Main:exit': (node) => {
                if (node instanceof Main) {
                    reportTooManyLines(node, mainMaximumLinesNb);
                }
            }
        };
    }
};