odin-default-js-exercises/node_modules/eslint-plugin-import/lib/rules/newline-after-import.js

'use strict';

var _staticRequire = require('../core/staticRequire');

var _staticRequire2 = _interopRequireDefault(_staticRequire);

var _debug = require('debug');

var _debug2 = _interopRequireDefault(_debug);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * @fileoverview Rule to enforce new line after import not followed by another import.
 * @author Radek Benkel
 */

const log = (0, _debug2.default)('eslint-plugin-import:rules:newline-after-import');

//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------

function containsNodeOrEqual(outerNode, innerNode) {
  return outerNode.range[0] <= innerNode.range[0] && outerNode.range[1] >= innerNode.range[1];
}

function getScopeBody(scope) {
  if (scope.block.type === 'SwitchStatement') {
    log('SwitchStatement scopes not supported');
    return null;
  }

  const body = scope.block.body;

  if (body && body.type === 'BlockStatement') {
    return body.body;
  }

  return body;
}

function findNodeIndexInScopeBody(body, nodeToFind) {
  return body.findIndex(node => containsNodeOrEqual(node, nodeToFind));
}

function getLineDifference(node, nextNode) {
  return nextNode.loc.start.line - node.loc.end.line;
}

function isClassWithDecorator(node) {
  return node.type === 'ClassDeclaration' && node.decorators && node.decorators.length;
}

module.exports = {
  meta: {
    docs: {},
    schema: [{
      'type': 'object',
      'properties': {
        'count': {
          'type': 'integer',
          'minimum': 1
        }
      },
      'additionalProperties': false
    }],
    fixable: 'whitespace'
  },
  create: function (context) {
    let level = 0;
    const requireCalls = [];

    function checkForNewLine(node, nextNode, type) {
      if (isClassWithDecorator(nextNode)) {
        nextNode = nextNode.decorators[0];
      }

      const options = context.options[0] || { count: 1 };
      const lineDifference = getLineDifference(node, nextNode);
      const EXPECTED_LINE_DIFFERENCE = options.count + 1;

      if (lineDifference < EXPECTED_LINE_DIFFERENCE) {
        let column = node.loc.start.column;

        if (node.loc.start.line !== node.loc.end.line) {
          column = 0;
        }

        context.report({
          loc: {
            line: node.loc.end.line,
            column
          },
          message: `Expected empty line after ${type} statement not followed by another ${type}.`,
          fix: fixer => fixer.insertTextAfter(node, '\n'.repeat(EXPECTED_LINE_DIFFERENCE - lineDifference))
        });
      }
    }

    function incrementLevel() {
      level++;
    }
    function decrementLevel() {
      level--;
    }

    return {
      ImportDeclaration: function (node) {
        const parent = node.parent;

        const nodePosition = parent.body.indexOf(node);
        const nextNode = parent.body[nodePosition + 1];

        if (nextNode && nextNode.type !== 'ImportDeclaration') {
          checkForNewLine(node, nextNode, 'import');
        }
      },
      CallExpression: function (node) {
        if ((0, _staticRequire2.default)(node) && level === 0) {
          requireCalls.push(node);
        }
      },
      'Program:exit': function () {
        log('exit processing for', context.getFilename());
        const scopeBody = getScopeBody(context.getScope());
        log('got scope:', scopeBody);

        requireCalls.forEach(function (node, index) {
          const nodePosition = findNodeIndexInScopeBody(scopeBody, node);
          log('node position in scope:', nodePosition);

          const statementWithRequireCall = scopeBody[nodePosition];
          const nextStatement = scopeBody[nodePosition + 1];
          const nextRequireCall = requireCalls[index + 1];

          if (nextRequireCall && containsNodeOrEqual(statementWithRequireCall, nextRequireCall)) {
            return;
          }

          if (nextStatement && (!nextRequireCall || !containsNodeOrEqual(nextStatement, nextRequireCall))) {

            checkForNewLine(statementWithRequireCall, nextStatement, 'require');
          }
        });
      },
      FunctionDeclaration: incrementLevel,
      FunctionExpression: incrementLevel,
      ArrowFunctionExpression: incrementLevel,
      BlockStatement: incrementLevel,
      ObjectExpression: incrementLevel,
      Decorator: incrementLevel,
      'FunctionDeclaration:exit': decrementLevel,
      'FunctionExpression:exit': decrementLevel,
      'ArrowFunctionExpression:exit': decrementLevel,
      'BlockStatement:exit': decrementLevel,
      'ObjectExpression:exit': decrementLevel,
      'Decorator:exit': decrementLevel
    };
  }
};
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