@addon24/eslint-config/rules/max-classes-per-file.js

ESLint configuration rules for WorldOfTextcraft projects - Centralized configuration for all project types

export default {
  meta: {
    type: "problem",
    docs: {
      description: "Enforce only one class per file",
      category: "Best Practices",
    },
    fixable: null,
    schema: [],
    messages: {
      tooManyClasses: "Only one class per file is allowed. Found {{count}} classes: {{names}}. Please split into separate files.",
    },
  },

  create(context) {
    const classes = [];

    function checkClasses() {
      if (classes.length > 1) {
        const classNames = classes.map(d => d.name);

        // Report on the first class found
        const firstClass = classes[0];

        context.report({
          node: firstClass.node,
          messageId: "tooManyClasses",
          data: {
            count: classes.length,
            names: classNames.join(", "),
          },
        });
      }
    }

    return {
      ClassDeclaration(node) {
        classes.push({
          node,
          name: node.id ? node.id.name : "Anonymous",
        });
      },

      "Program:exit"() {
        checkClasses();
      },
    };
  },
};