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sharedSchema.ts
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sharedSchema.ts
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/// The main schema for objects and inputs
import { AppContext } from "./context.ts";
import { graphql, path, tsMorph } from "./deps.ts";
import { typeMapper } from "./typeMap.ts";
export const createSharedSchemaFiles = async (context: AppContext) => {
await createSharedExternalSchemaFile(context);
await createSharedReturnPositionSchemaFile(context);
};
async function createSharedExternalSchemaFile(context: AppContext) {
const gql = context.gql;
const types = gql.getTypeMap();
const knownPrimitives = ["String", "Boolean", "Int"];
const { prisma, fieldFacts } = context;
const mapper = typeMapper(context, {});
const externalTSFile = context.tsProject.createSourceFile(
`/source/${context.settings.sharedFilename}`,
"",
);
Object.keys(types).forEach((name) => {
if (name.startsWith("__")) {
return;
}
if (knownPrimitives.includes(name)) {
return;
}
const type = types[name];
const pType = prisma.get(name);
if (
graphql.isObjectType(type) || graphql.isInterfaceType(type) ||
graphql.isInputObjectType(type)
) {
// This is slower than it could be, use the add many at once api
const docs = [];
if (pType?.leadingComments) {
docs.push(pType.leadingComments);
}
if (type.description) {
docs.push(type.description);
}
externalTSFile.addInterface({
name: type.name,
isExported: true,
docs: [],
properties: [
{
name: "__typename",
type: `"${type.name}"`,
hasQuestionToken: true,
},
...Object.entries(type.getFields()).map(([fieldName, obj]) => {
const docs = [];
const prismaField = pType?.properties.get(fieldName);
if (prismaField && prismaField.leadingComments.length) {
docs.push(prismaField.leadingComments.trim());
}
// if (obj.description) docs.push(obj.description);
const hasResolverImplementation = fieldFacts.get(name)?.[fieldName]?.hasResolverImplementation;
const isOptionalInSDL = !graphql.isNonNullType(obj.type);
const doesNotExistInPrisma = false; // !prismaField;
const field: tsMorph.OptionalKind<tsMorph.PropertySignatureStructure> = {
name: fieldName,
type: mapper.map(obj.type, { preferNullOverUndefined: true }),
docs,
hasQuestionToken: hasResolverImplementation || isOptionalInSDL || doesNotExistInPrisma,
};
return field;
}),
],
});
}
if (graphql.isEnumType(type)) {
externalTSFile.addTypeAlias({
name: type.name,
type: '"' + type.getValues().map((m) => m.value).join('" | "') + '"',
});
}
});
const { scalars } = mapper.getReferencedGraphQLThingsInMapping();
if (scalars.length) {
externalTSFile.addTypeAliases(
scalars.map((s) => ({
name: s,
type: "any",
})),
);
}
externalTSFile.formatText({ indentSize: 2 });
await context.writeTextFile(
path.join(
context.settings.typesFolderRoot,
context.settings.sharedFilename,
),
externalTSFile.getText(),
);
}
async function createSharedReturnPositionSchemaFile(context: AppContext) {
const { gql, prisma, fieldFacts } = context;
const types = gql.getTypeMap();
const mapper = typeMapper(context, { preferPrismaModels: true });
const typesToImport = [] as string[];
const knownPrimitives = ["String", "Boolean", "Int"];
const externalTSFile = context.tsProject.createSourceFile(
`/source/${context.settings.sharedInternalFilename}`,
`
// You may very reasonably ask yourself, 'what is this file?' and why do I need it.
// Roughly, this file ensures that when a resolver wants to return a type - that
// type will match a prisma model. This is useful because you can trivially extend
// the type in the SDL and not have to worry about type mis-matches because the thing
// you returned does not include those functions.
// This gets particularly useful when you want to return a union type, an interface,
// or a model where the prisma model is nested pretty deeply (connections, for example.)
`,
);
Object.keys(types).forEach((name) => {
if (name.startsWith("__")) {
return;
}
if (knownPrimitives.includes(name)) {
return;
}
const type = types[name];
const pType = prisma.get(name);
if (
graphql.isObjectType(type) || graphql.isInterfaceType(type) ||
graphql.isInputObjectType(type)
) {
// Return straight away if we have a matching type in the prisma schema
// as we dont need it
if (pType) {
typesToImport.push(name);
return;
}
externalTSFile.addInterface({
name: type.name,
isExported: true,
docs: [],
properties: [
{
name: "__typename",
type: `"${type.name}"`,
hasQuestionToken: true,
},
...Object.entries(type.getFields()).map(([fieldName, obj]) => {
const hasResolverImplementation = fieldFacts.get(name)?.[fieldName]?.hasResolverImplementation;
const isOptionalInSDL = !graphql.isNonNullType(obj.type);
const doesNotExistInPrisma = false; // !prismaField;
const field: tsMorph.OptionalKind<tsMorph.PropertySignatureStructure> = {
name: fieldName,
type: mapper.map(obj.type, { preferNullOverUndefined: true }),
hasQuestionToken: hasResolverImplementation || isOptionalInSDL || doesNotExistInPrisma,
};
return field;
}),
],
});
}
if (graphql.isEnumType(type)) {
externalTSFile.addTypeAlias({
name: type.name,
type: '"' + type.getValues().map((m) => m.value).join('" | "') + '"',
});
}
});
const { scalars, prisma: prismaModels } = mapper.getReferencedGraphQLThingsInMapping();
if (scalars.length) {
externalTSFile.addTypeAliases(
scalars.map((s) => ({
name: s,
type: "any",
})),
);
}
const allPrismaModels = [...new Set([...prismaModels, ...typesToImport])].sort();
if (allPrismaModels.length) {
externalTSFile.addImportDeclaration({
isTypeOnly: true,
moduleSpecifier: `@prisma/client`,
namedImports: allPrismaModels.map((p) => `${p} as P${p}`),
});
allPrismaModels.forEach((p) => {
externalTSFile.addTypeAlias({
isExported: true,
name: p,
type: `P${p}`,
});
});
}
externalTSFile.formatText({ indentSize: 2 });
await context.writeTextFile(
path.join(
context.settings.typesFolderRoot,
context.settings.sharedInternalFilename,
),
externalTSFile.getText(),
);
}