refactor(ts-client): schema module (#770)

Author: jasonkuhrt

src/ResultSet/ResultSet.ts

@@ -3,7 +3,8 @@
 import type { Simplify } from 'type-fest'
 import type { GetKeyOr, SimplifyDeep } from '../lib/prelude.js'
 import type { TSError } from '../lib/TSError.js'
-import type { Schema } from '../Schema/__.js'
+import type { Schema, SomeField } from '../Schema/__.js'
+import type { PickScalarFields } from '../Schema/Output/Output.js'
 import type { SelectionSet } from '../SelectionSet/__.js'
 
 // dprint-ignore
@@ -19,18 +20,15 @@ export type Subscription<$SelectionSetSubscription extends object, $Index extend
   SimplifyDeep<Object$<$SelectionSetSubscription, Exclude<$Index['Root']['Subscription'], null>, $Index>>
 
 // dprint-ignore
-export type Object$<$SelectionSet, $Node extends Schema.Named.Object$2, $Index extends Schema.Index> =
+export type Object$<$SelectionSet, $Node extends Schema.Output.Object$2, $Index extends Schema.Index> =
   SelectionSet.IsSelectScalarsWildcard<$SelectionSet> extends true
 
     /**
      * Handle Scalars Wildcard
      */
     ?
       {
-      [$Key in keyof $Node['fields'] as $Node['fields'][$Key] extends Schema.Field.Field<Schema.Field.Type.Output.__typename>  | {'typeUnwrapped':{kind:'Scalar'}} ? $Key : never]:
-        // eslint-disable-next-line
-        // @ts-ignore infinite depth issue, can this be fixed?
-         Field<$SelectionSet, Schema.Field.As<$Node['fields'][$Key]>, $Index>
+        [$Key in keyof PickScalarFields<$Node>]: Field<$SelectionSet, $Node['fields'][$Key], $Index>
       }
     /**
      * Handle fields in regular way.
@@ -44,15 +42,15 @@ export type Object$<$SelectionSet, $Node extends Schema.Named.Object$2, $Index e
       }>
 
 // dprint-ignore
-type Union<$SelectionSet, $Node extends Schema.Named.Union, $Index extends Schema.Index> =
+type Union<$SelectionSet, $Node extends Schema.Output.Union, $Index extends Schema.Index> =
   OnTypeFragment<$SelectionSet,$Node['members'][number], $Index>
 
 // dprint-ignore
-type Interface<$SelectionSet, $Node extends Schema.Named.Interface, $Index extends Schema.Index> =
+type Interface<$SelectionSet, $Node extends Schema.Output.Interface, $Index extends Schema.Index> =
   OnTypeFragment<$SelectionSet, $Node['implementors'][number], $Index>
 
 // dprint-ignore
-type OnTypeFragment<$SelectionSet, $Node extends Schema.Named.Object$2, $Index extends Schema.Index> =
+type OnTypeFragment<$SelectionSet, $Node extends Schema.Output.Object$2, $Index extends Schema.Index> =
   $Node extends any // force distribution
     ? Object$<
         GetKeyOr<$SelectionSet, `on${Capitalize<$Node['fields']['__typename']['type']['type']>}`, {}> & SelectionSet.OmitOnTypeFragments<$SelectionSet>,
@@ -62,7 +60,7 @@ type OnTypeFragment<$SelectionSet, $Node extends Schema.Named.Object$2, $Index e
     : never
 
 // dprint-ignore
-type Field<$SelectionSet, $Field extends Schema.Field.Field, $Index extends Schema.Index> =
+type Field<$SelectionSet, $Field extends SomeField, $Index extends Schema.Index> =
   $SelectionSet extends SelectionSet.Directive.Include.Negative | SelectionSet.Directive.Skip.Positive ?
      null :
      (
@@ -74,18 +72,18 @@ type Field<$SelectionSet, $Field extends Schema.Field.Field, $Index extends Sche
 // dprint-ignore
 type FieldType<
   $SelectionSet,
-  $Type extends Schema.Field.Type.Output.Any,
+  $Type extends Schema.Output.Any,
   $Index extends Schema.Index
 > =Simplify<
-  $Type extends Schema.Field.Type.Output.__typename<infer $Value>   ? $Value :
-  $Type extends Schema.Field.Type.Output.Nullable<infer $InnerType> ? null | FieldType<$SelectionSet, $InnerType, $Index> :
-  $Type extends Schema.Field.Type.Output.List<infer $InnerType>     ? Array<FieldType<$SelectionSet, $InnerType, $Index>> :
-  $Type extends Schema.Named.Enum<infer _, infer $Members>          ? $Members[number] :
-  $Type extends Schema.Named.Scalar.Any                             ? ReturnType<$Type['codec']['decode']> :
-  $Type extends Schema.Named.Object$2                                 ? Object$<$SelectionSet,$Type,$Index> :
-  $Type extends Schema.Named.Interface                              ? Interface<$SelectionSet,$Type,$Index> :
-  $Type extends Schema.Named.Union                                  ? Union<$SelectionSet,$Type,$Index> :
-                                                                      TSError<'FieldType', `Unknown type`, { $Type: $Type }>
+  $Type extends Schema.__typename<infer $Value>             ? $Value :
+  $Type extends Schema.Output.Nullable<infer $InnerType>    ? null | FieldType<$SelectionSet, $InnerType, $Index> :
+  $Type extends Schema.Output.List<infer $InnerType>        ? Array<FieldType<$SelectionSet, $InnerType, $Index>> :
+  $Type extends Schema.Enum<infer _, infer $Members>        ? $Members[number] :
+  $Type extends Schema.Scalar.Any                           ? ReturnType<$Type['codec']['decode']> :
+  $Type extends Schema.Object$2                             ? Object$<$SelectionSet,$Type,$Index> :
+  $Type extends Schema.Interface                            ? Interface<$SelectionSet,$Type,$Index> :
+  $Type extends Schema.Union                                ? Union<$SelectionSet,$Type,$Index> :
+                                                              TSError<'FieldType', `Unknown type`, { $Type: $Type }>
   >
 
 // dprint-ignore
@@ -104,5 +102,5 @@ type FieldDirectiveSkip<$SelectionSet> =
 
 // dprint-ignore
 export namespace Errors {
-  export type UnknownFieldName<$FieldName extends string, $Object extends Schema.Named.Object$2> = TSError<'Object', `field "${$FieldName}" does not exist on object "${$Object['fields']['__typename']['type']['type']}"`>
+  export type UnknownFieldName<$FieldName extends string, $Object extends Schema.Object$2> = TSError<'Object', `field "${$FieldName}" does not exist on object "${$Object['fields']['__typename']['type']['type']}"`>
 }

src/Schema/Args.ts

@@ -0,0 +1,26 @@
+import type { Input } from './_.js'
+import type { Nullable } from './Input/types/Nullable.js'
+
+type InputFields = Record<string, any>
+
+// dprint-ignore
+export type InputFieldsAllNullable<$Fields extends InputFields> =
+  Exclude<$Fields[keyof $Fields], Nullable<any>> extends never ? true : false
+
+export interface Args<$Fields extends InputFields> {
+  fields: $Fields
+}
+
+export const Args = <F extends InputFields>(fields: F): Args<F> => {
+  return {
+    fields,
+  }
+}
+
+export type OmitNullableFields<$Fields extends InputFields> = {
+  [Key in keyof $Fields as $Fields[Key] extends Input.Nullable<any> ? never : Key]: $Fields[Key]
+}
+
+export type PickNullableFields<$Fields extends InputFields> = {
+  [Key in keyof $Fields as $Fields[Key] extends Input.Nullable<any> ? Key : never]: $Fields[Key]
+}

src/Schema/Field.ts

@@ -0,0 +1,31 @@
+import type { Args } from './Args.js'
+import type { MaybeThunk } from './core/helpers.js'
+import type { Hybrid } from './Hybrid/__.js'
+import type { Output } from './Output/__.js'
+
+export type Field<$Type extends Output.Any, $Args extends Args<any> | null> = {
+  type: $Type
+  args: $Args
+}
+
+export const field = <$Type extends Output.Any, $Args extends null | Args<any> = null>(
+  type: MaybeThunk<$Type>,
+  args: $Args = null as $Args,
+): Field<$Type, $Args> => {
+  return {
+    // At type level "type" is not a thunk
+    type: type as any, // eslint-disable-line
+    args,
+  }
+}
+
+// todo test non null union and non null interface fields
+export type SomeField = Field<
+  Hybrid.Enum | Hybrid.Scalar.Any | Output.List<any> | Output.Nullable<any> | Output.Object$2<any, any>,
+  Args<any> | null
+>
+
+export type SomeFields<$Keys extends string | number | symbol = string | number | symbol> = Record<
+  $Keys,
+  SomeField
+>

src/Schema/Field/Field.ts

@@ -0,0 +1,2 @@
+export * from './types/Enum.js'
+export * from './types/Scalar/__.js'

src/Schema/Field/Type.ts

@@ -0,0 +1 @@
+export * as Hybrid from './_.js'