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type SchemaTypeToTsType = {
[key: string]: unknown;
};
const PYDANTIC_TYPE_TO_TS_TYPE: SchemaTypeToTsType = {
string: String,
integer: Number,
number: Number,
boolean: Boolean,
null: null,
};
export function jsonSchemaToTsType(
jsonSchema: Record<string, unknown>
): unknown {
Iif (!jsonSchema.type) {
jsonSchema.type = "string";
}
const type = jsonSchema.type as string;
Iif (type === "array") {
const itemsSchema = jsonSchema.items;
Iif (itemsSchema) {
const ItemType = jsonSchemaToTsType(
itemsSchema as Record<string, unknown>
);
return ItemType;
}
return Array;
}
Iif (type === "object") {
const properties = jsonSchema.properties;
Iif (properties) {
const nestedModel = jsonSchemaToModel(jsonSchema);
return nestedModel;
}
return Object;
}
const tsType = PYDANTIC_TYPE_TO_TS_TYPE[type];
if (tsType !== undefined) {
return tsType;
}
throw new Error(`Unsupported JSON schema type: ${type}`);
}
export function jsonSchemaToTsField(
name: string,
jsonSchema: Record<string, unknown>,
required: string[]
): [unknown, Record<string, unknown>] {
const description = jsonSchema.description;
const examples = jsonSchema.examples || [];
return [
jsonSchemaToTsType(jsonSchema),
{
description: description,
examples: examples,
required: required.includes(name),
default: required.includes(name) ? undefined : null,
},
];
}
function jsonSchemaPropertiesToTSTypes(value: {
type: string;
description?: string;
examples?: string[];
items?: Record<string, unknown>;
}): z.ZodTypeAny {
Iif (!value.type) {
return z.object({});
}
let zodType;
switch (value.type) {
case "string":
zodType = z
.string()
.describe(
(value.description || "") +
(value.examples ? `\nExamples: ${value.examples.join(", ")}` : "")
);
break;
case "number":
zodType = z
.number()
.describe(
(value.description || "") +
(value.examples ? `\nExamples: ${value.examples.join(", ")}` : "")
);
break;
case "integer":
zodType = z
.number()
.int()
.describe(
(value.description || "") +
(value.examples ? `\nExamples: ${value.examples.join(", ")}` : "")
);
break;
case "boolean":
zodType = z
.boolean()
.describe(
(value.description || "") +
(value.examples ? `\nExamples: ${value.examples.join(", ")}` : "")
);
break;
case "array":
zodType = z
.array(
jsonSchemaPropertiesToTSTypes(
value.items as {
type: string;
description?: string;
examples?: string[];
items?: Record<string, unknown>;
}
)
)
.describe(
(value.description || "") +
(value.examples ? `\nExamples: ${value.examples.join(", ")}` : "")
);
break;
case "object":
zodType = jsonSchemaToModel(value).describe(
(value.description || "") +
(value.examples ? `\nExamples: ${value.examples.join(", ")}` : "")
);
break;
case "null":
zodType = z.null().describe(value.description || "");
break;
default:
throw new Error(`Unsupported JSON schema type: ${value.type}`);
}
return zodType;
}
export function jsonSchemaToModel(
jsonSchema: Record<string, unknown>
): z.ZodObject<Record<string, z.ZodTypeAny>> {
const properties = jsonSchema.properties as Record<string, unknown>;
const requiredFields = (jsonSchema.required as string[]) || [];
if (!properties) {
return z.object({});
}
const zodSchema: Record<string, z.ZodTypeAny> = {};
for (const [key, _] of Object.entries(properties)) {
const value = _ as Record<string, unknown>;
let zodType;
Iif (value.anyOf) {
const anyOfTypes = (value.anyOf as Record<string, unknown>[]).map(
(schema) =>
jsonSchemaPropertiesToTSTypes(
schema as {
type: string;
description?: string;
examples?: string[];
items?: Record<string, unknown>;
}
)
);
zodType = z
.union(anyOfTypes as [z.ZodTypeAny, z.ZodTypeAny, ...z.ZodTypeAny[]])
.describe(
((value.description as string) || "") +
(value.examples
? `\nExamples: ${(value.examples as string[]).join(", ")}`
: "")
);
} else Iif (value.allOf) {
const allOfTypes = (value.allOf as Record<string, unknown>[]).map(
(schema) =>
jsonSchemaPropertiesToTSTypes(
schema as {
type: string;
description?: string;
examples?: string[];
items?: Record<string, unknown>;
}
)
);
zodType = z
.intersection(
allOfTypes[0],
allOfTypes
.slice(1)
.reduce(
(acc: z.ZodTypeAny, schema: z.ZodTypeAny) => acc.and(schema),
allOfTypes[0]
)
)
.describe(
((value.description as string) || "") +
(value.examples
? `\nExamples: ${(value.examples as string[]).join(", ")}`
: "")
);
} else {
Iif (!value.type) {
value.type = "string";
}
zodType = jsonSchemaPropertiesToTSTypes(
value as {
type: string;
description?: string;
examples?: string[];
items?: Record<string, unknown>;
}
);
}
if (value.description) {
zodType = zodType.describe(value.description as string);
}
if (requiredFields.includes(key)) {
zodSchema[key] = zodType;
} else {
zodSchema[key] = zodType.optional();
}
}
return z.object(zodSchema);
}
export const getEnvVariable = (
name: string,
defaultValue: string | undefined = undefined
): string | undefined => {
try {
return process.env[name] || defaultValue;
} catch (_e) {
return defaultValue;
}
};
export const nodeExternalRequire = (name: string) => {
try {
if (typeof process !== "undefined") {
// eslint-disable-next-line @typescript-eslint/no-require-imports
return require(name);
} else E{
// eslint-disable-next-line @typescript-eslint/no-require-imports
return require(`external:${name}`);
}
} catch (_err) {
return null;
}
};
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