eslint-plugin-perfectionist/dist/rules/sort-imports/compute-specifier-name.js

ESLint plugin for sorting various data such as objects, imports, types, enums, JSX props, etc.

import { UnreachableCaseError } from '../../utils/unreachable-case-error.js'
import { AST_NODE_TYPES } from '@typescript-eslint/utils'
function computeSpecifierName({ sourceCode, node }) {
  switch (node.type) {
    case AST_NODE_TYPES.TSImportEqualsDeclaration:
      return node.id.name
    case AST_NODE_TYPES.VariableDeclaration:
      return computeVariableDeclarationSpecifierName(node, sourceCode)
    case AST_NODE_TYPES.ImportDeclaration:
      return computeImportDeclarationSpecifierName(node)
    /* v8 ignore next 2 -- @preserve Exhaustive guard. */
    default:
      throw new UnreachableCaseError(node)
  }
}
function computeVariableDeclarationSpecifierName(node, sourceCode) {
  let [declaration] = node.declarations
  switch (declaration.id.type) {
    case AST_NODE_TYPES.ObjectPattern:
      return computeObjectPatternPropertyName(declaration.id.properties[0])
    case AST_NODE_TYPES.ArrayPattern:
      if (!declaration.id.elements[0]) {
        return null
      }
      return sourceCode.getText(declaration.id.elements[0])
    case AST_NODE_TYPES.Identifier:
      return declaration.id.name
    /* v8 ignore next 2 -- @preserve Exhaustive guard. */
    default:
      throw new UnreachableCaseError(declaration.id)
  }
  function computeObjectPatternPropertyName(property) {
    if (!property) {
      return null
    }
    switch (property.type) {
      case AST_NODE_TYPES.RestElement:
        return sourceCode.getText(property.argument)
      case AST_NODE_TYPES.Property:
        return sourceCode.getText(property.value)
      /* v8 ignore next 2 -- @preserve Exhaustive guard. */
      default:
        throw new UnreachableCaseError(property)
    }
  }
}
function computeImportDeclarationSpecifierName(node) {
  let [specifier] = node.specifiers
  if (!specifier) {
    return null
  }
  switch (specifier.type) {
    case AST_NODE_TYPES.ImportNamespaceSpecifier:
      return specifier.local.name
    case AST_NODE_TYPES.ImportDefaultSpecifier:
      return specifier.local.name
    case AST_NODE_TYPES.ImportSpecifier:
      return specifier.local.name
    /* v8 ignore next 2 -- @preserve Exhaustive guard. */
    default:
      throw new UnreachableCaseError(specifier)
  }
}
export { computeSpecifierName }