react-magnetic-di/lib/esm/eslint/rules/no-duplicate.js

Context driven dependency injection

const {
  getDiIdentifier,
  getDiStatements,
  getDiVars
} = require('../utils');
module.exports = {
  meta: {
    type: 'problem',
    docs: {
      description: 'Disallow dependencies to be marked as injectable more than once',
      category: 'Possible Errors',
      recommended: true
    },
    // fixable: 'code',
    schema: [],
    messages: {
      duplicatedInjectable: "The dependency '{{name}}' has been marked as injectable more than once. " + 'Please ensure it is listed only on one di(...) call'
    }
  },
  create: function (context) {
    let diIdentifier;
    const report = node => context.report({
      node,
      messageId: 'duplicatedInjectable',
      data: {
        name: node.name
      }
    });
    return {
      ImportDeclaration(node) {
        if (!diIdentifier) diIdentifier = getDiIdentifier(node);
      },
      BlockStatement(node) {
        if (!diIdentifier) return;
        const diStatements = getDiStatements(node, diIdentifier);
        // ignore locations where di was not explicitly set
        if (!diStatements.length) return;
        const dupeDiVars = getDiVars(diStatements).filter((id, i, arr) => arr.findIndex(n => n.name === id.name) !== i);
        dupeDiVars.forEach(report);
      }
    };
  }
};