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Implement custom scalar prompt #6

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merged 1 commit into from
Jun 8, 2024
Merged

Implement custom scalar prompt #6

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30 changes: 26 additions & 4 deletions Sources/GraphQLCodeGen/codegen.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@ import SwiftSyntax
import SwiftSyntaxBuilder
import GraphQLParser

enum CodegenErrors: Error {
public enum CodegenErrors: Error {
case missingQueryTypeName
case missingQueryType

Expand All @@ -14,7 +14,7 @@ enum CodegenErrors: Error {
case TODO(String)
}

public class Context {
class Context {
let serverUrl: String
let schema: __Schema
private let documents: [DocumentNode]
Expand All @@ -40,16 +40,21 @@ public class Context {
}

var visitedTypes: Set<String> = Set()

// data used for stdout
var requiredCustomScalars: [String: (desc: String?, specifiedByURL: String?)] = [:]
}

private func generateVisitedTypes(ctx: Context) throws -> [DeclSyntaxProtocol] {
func generateVisitedTypes(ctx: Context) throws -> [DeclSyntaxProtocol] {
var decls: [DeclSyntaxProtocol] = []
while let tpName = ctx.visitedTypes.popFirst() {
if (isGraphQLBuiltInScalarType(str: tpName)) { continue }
guard let tp = ctx.schema.types.first(where: { $0.name == tpName }) else {
throw CodegenErrors.invalidType(tpName)
}
switch tp.kind {
case .SCALAR:
if (isGraphQLBuiltInScalarType(str: tpName)) { continue }
ctx.requiredCustomScalars[tpName] = (desc: tp.description, specifiedByURL: tp.specifiedByURL)
case .INPUT_OBJECT:
for field in tp.inputFields ?? [] {
let innerTp = try getWrappedType(ctx: ctx, type: field.type)
Expand Down Expand Up @@ -218,5 +223,22 @@ public func generate(serverUrl: String, schema: __Schema, documents: [DocumentNo
)
}.formatted().description
content += "\n"

let requiredCustomScalars = ctx.requiredCustomScalars.enumerated()
.sorted(by: { $0.element.key < $1.element.key })
.map { $0.element }
if (requiredCustomScalars.count > 0) {
print("Please implement custom scalars:")
for (name, (desc, specifiedByURL)) in requiredCustomScalars {
print("- \(name)")
if let desc {
print(" - description: \(desc)")
}
if let specifiedByURL {
print(" - specifiedByURL: \(specifiedByURL)")
}
}
}

return content
}
6 changes: 3 additions & 3 deletions Sources/GraphQLCodeGen/generator-primitives.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -24,12 +24,12 @@ func convertSchemaTypeToSwiftType(ctx: Context, type: __Type, nonNull: Bool = fa
let tp: TypeSyntaxProtocol
switch type.kind {
case .SCALAR:
ctx.visitedTypes.insert(type.name!)
if let scalarType = GraphQLBuiltInScalarType(rawValue: type.name!) {
tp = IdentifierTypeSyntax(name: TokenSyntax.identifier(scalarType.swiftType))
} else {
// TODO: Support custom scalars
// https://spec.graphql.org/October2021/#sec-Scalars.Custom-Scalars
throw CodegenErrors.TODO("support convertSchemaTypeToSwiftType for custom scalars")
tp = IdentifierTypeSyntax(name: TokenSyntax.identifier(type.name!))
}
case .OBJECT:
ctx.visitedTypes.insert(type.name!)
Expand Down Expand Up @@ -65,7 +65,7 @@ func getWrappedType(ctx: Context, type: __Type) throws -> __Type {
case .SCALAR:
return type
case .OBJECT:
guard let name = type.name else { throw CodegenErrors.invalidType("Expect name for OBJECT type") }
guard let name: String = type.name else { throw CodegenErrors.invalidType("Expect name for OBJECT type") }
return ctx.schema.types.first(where: { $0.name == name })!
case .INTERFACE:
return type
Expand Down