attribute-hyphenation.js

/**
 * @fileoverview Define a style for the props casing in templates.
 * @author Armano
 */
'use strict'

const utils = require('../utils')
const casing = require('../utils/casing')
const svgAttributes = require('../utils/svg-attributes-weird-case.json')

/**
 * @param {VDirective | VAttribute} node
 * @returns {string | null}
 */
function getAttributeName(node) {
  if (!node.directive) {
    return node.key.rawName
  }

  if (
    node.key.name.name === 'bind' &&
    node.key.argument &&
    node.key.argument.type === 'VIdentifier'
  ) {
    return node.key.argument.rawName
  }

  return null
}

module.exports = {
  meta: {
    type: 'suggestion',
    docs: {
      description:
        'enforce attribute naming style on custom components in template',
      categories: ['vue3-strongly-recommended', 'vue2-strongly-recommended'],
      url: 'https://eslint.vuejs.org/rules/attribute-hyphenation.html'
    },
    fixable: 'code',
    schema: [
      {
        enum: ['always', 'never']
      },
      {
        type: 'object',
        properties: {
          ignore: {
            type: 'array',
            items: {
              allOf: [
                { type: 'string' },
                { not: { type: 'string', pattern: ':exit$' } },
                { not: { type: 'string', pattern: String.raw`^\s*$` } }
              ]
            },
            uniqueItems: true,
            additionalItems: false
          }
        },
        additionalProperties: false
      }
    ],
    messages: {
      mustBeHyphenated: "Attribute '{{text}}' must be hyphenated.",
      cannotBeHyphenated: "Attribute '{{text}}' can't be hyphenated."
    }
  },
  /** @param {RuleContext} context */
  create(context) {
    const sourceCode = context.getSourceCode()
    const option = context.options[0]
    const optionsPayload = context.options[1]
    const useHyphenated = option !== 'never'
    const ignoredAttributes = ['data-', 'aria-', 'slot-scope', ...svgAttributes]

    if (optionsPayload && optionsPayload.ignore) {
      ignoredAttributes.push(...optionsPayload.ignore)
    }

    const caseConverter = casing.getExactConverter(
      useHyphenated ? 'kebab-case' : 'camelCase'
    )

    /**
     * @param {VDirective | VAttribute} node
     * @param {string} name
     */
    function reportIssue(node, name) {
      const text = sourceCode.getText(node.key)

      context.report({
        node: node.key,
        loc: node.loc,
        messageId: useHyphenated ? 'mustBeHyphenated' : 'cannotBeHyphenated',
        data: {
          text
        },
        fix: (fixer) => {
          if (text.includes('_')) {
            return null
          }

          if (/^[A-Z]/.test(name)) {
            return null
          }

          return fixer.replaceText(
            node.key,
            text.replace(name, caseConverter(name))
          )
        }
      })
    }

    /**
     * @param {string} value
     */
    function isIgnoredAttribute(value) {
      const isIgnored = ignoredAttributes.some((attr) => value.includes(attr))

      if (isIgnored) {
        return true
      }

      return useHyphenated ? value.toLowerCase() === value : !/-/.test(value)
    }

    return utils.defineTemplateBodyVisitor(context, {
      VAttribute(node) {
        if (
          !utils.isCustomComponent(node.parent.parent) &&
          node.parent.parent.name !== 'slot'
        )
          return

        const name = getAttributeName(node)
        if (name === null || isIgnoredAttribute(name)) return

        reportIssue(node, name)
      }
    })
  }
}