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Add enum support #4

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Add enum support #4

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4a31fee
Add enum support
anisebamford Sep 11, 2023
8b26c68
Fix type of values.
anisebamford Sep 12, 2023
b09dd4e
Revert type assertion.
anisebamford Sep 12, 2023
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31 changes: 27 additions & 4 deletions src/createSchema.ts
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
import {
GraphQLBoolean,
GraphQLEnumType,
GraphQLEnumTypeConfig,
GraphQLFieldConfigArgumentMap,
GraphQLFieldConfigMap,
GraphQLFloat,
Expand All @@ -18,10 +20,11 @@ import {
GraphQLUnionType,
GraphQLError,
Kind,
ValueNode,
} from 'graphql';
import * as ts from 'typescript';
import {DateType} from './date';
import {typeAST, AllTypes, Interface, Primitive, Union, InterfaceLiteral, UnionLiteral} from 'ts-type-ast';
import {typeAST, AllTypes, Interface, Primitive, Union, InterfaceLiteral, UnionLiteral, Enum} from 'ts-type-ast';

type CustomScalarFactory = (type: Primitive) => GraphQLScalarType | undefined;
export function createSchema(
Expand Down Expand Up @@ -78,8 +81,8 @@ export function createSchema(
case 'interface':
case 'interfaceLiteral':
return createGQLType(type, isInput);
// case 'enum':
// return add(type, createGQLEnum(type));
case 'enum':
return add(type, createGQLEnum(type));
case 'union':
case 'unionLiteral':
if (isInput) return add(type, createGQLInputUnion(type));
Expand Down Expand Up @@ -179,7 +182,7 @@ export function createSchema(
description: type.kind === 'union' ? type.doc : undefined,
serialize: validate,
parseValue: validate,
parseLiteral(ast) {
parseLiteral(ast: ValueNode) {
if (ast.kind === Kind.STRING) {
return validate(ast.value);
}
Expand All @@ -205,6 +208,26 @@ export function createSchema(
}
throw new Error('Unexpected type: ' + JSON.stringify(type));
}

function createGQLEnum(type: Enum) {
const values = type.types.reduce((acc, item, index) => {
if (item.kind !== "primitive") {
throw new Error(`Only string enum values are supported: ${JSON.stringify(type)}`)
}
else {
if (item.type !== "string") {
throw new Error(`Only string enum values are supported: ${JSON.stringify(type)}`)
}
acc[item.literal as string] = {value: index}
}
return acc;
}, {} as GraphQLEnumTypeConfig["values"])

return new GraphQLEnumType({
name: type.name,
values
})
}
}

function never(never: never): never {
Expand Down