@graphql-eslint/eslint-plugin/esm/rules/no-unused-fields.js

GraphQL plugin for ESLint

import "../chunk-BMTV3EA2.js";
import { TypeInfo, visit, visitWithTypeInfo } from "graphql";
import { requireGraphQLSchemaFromContext, requireSiblingsOperations } from "../utils.js";
const RULE_ID = "no-unused-fields";
let usedFieldsCache;
function getUsedFields(schema, operations) {
  if (usedFieldsCache) {
    return usedFieldsCache;
  }
  const usedFields = /* @__PURE__ */ Object.create(null);
  const typeInfo = new TypeInfo(schema);
  const visitor = visitWithTypeInfo(typeInfo, {
    Field(node) {
      var _a;
      const fieldDef = typeInfo.getFieldDef();
      if (!fieldDef) {
        return false;
      }
      const parentTypeName = typeInfo.getParentType().name;
      const fieldName = node.name.value;
      (_a = usedFields[parentTypeName]) != null ? _a : usedFields[parentTypeName] = /* @__PURE__ */ new Set();
      usedFields[parentTypeName].add(fieldName);
    }
  });
  const allDocuments = [...operations.getOperations(), ...operations.getFragments()];
  for (const { document } of allDocuments) {
    visit(document, visitor);
  }
  usedFieldsCache = usedFields;
  return usedFieldsCache;
}
const rule = {
  meta: {
    messages: {
      [RULE_ID]: 'Field "{{fieldName}}" is unused'
    },
    docs: {
      description: "Requires all fields to be used at some level by siblings operations.",
      category: "Schema",
      url: `https://the-guild.dev/graphql/eslint/rules/${RULE_ID}`,
      requiresSiblings: true,
      requiresSchema: true,
      isDisabledForAllConfig: true,
      examples: [
        {
          title: "Incorrect",
          code: (
            /* GraphQL */
            `
            type User {
              id: ID!
              name: String
              someUnusedField: String
            }

            type Query {
              me: User
            }

            query {
              me {
                id
                name
              }
            }
          `
          )
        },
        {
          title: "Correct",
          code: (
            /* GraphQL */
            `
            type User {
              id: ID!
              name: String
            }

            type Query {
              me: User
            }

            query {
              me {
                id
                name
              }
            }
          `
          )
        }
      ]
    },
    type: "suggestion",
    schema: [],
    hasSuggestions: true
  },
  create(context) {
    const schema = requireGraphQLSchemaFromContext(RULE_ID, context);
    const siblingsOperations = requireSiblingsOperations(RULE_ID, context);
    const usedFields = getUsedFields(schema, siblingsOperations);
    return {
      FieldDefinition(node) {
        var _a;
        const fieldName = node.name.value;
        const parentTypeName = node.parent.name.value;
        const isUsed = (_a = usedFields[parentTypeName]) == null ? void 0 : _a.has(fieldName);
        if (isUsed) {
          return;
        }
        context.report({
          node: node.name,
          messageId: RULE_ID,
          data: { fieldName },
          suggest: [
            {
              desc: `Remove \`${fieldName}\` field`,
              fix(fixer) {
                const sourceCode = context.getSourceCode();
                const tokenBefore = sourceCode.getTokenBefore(node);
                const tokenAfter = sourceCode.getTokenAfter(node);
                const isEmptyType = tokenBefore.type === "{" && tokenAfter.type === "}";
                return fixer.remove(isEmptyType ? node.parent : node);
              }
            }
          ]
        });
      }
    };
  }
};
export {
  rule
};