@omer-x/typesculptor/dist/index.js

generates interpretable json objects to generate TypeScript types from JSON Schemas

// src/core/handleArrayType.ts
function handleArrayType(schema) {
  if (schema.type !== "array") throw new Error("Schema type must be 'array'");
  const dependencies = [];
  const itemBodies = [];
  for (const item of [schema.items].flat()) {
    const itemDefinition = generateTypeDefinition(item);
    dependencies.push(...itemDefinition.dependencies);
    itemBodies.push(itemDefinition.body);
  }
  if (schema.minItems && schema.maxItems && schema.minItems === schema.maxItems) {
    return { dependencies, body: `[${itemBodies.join(", ")}]` };
  }
  if (itemBodies.length > 1) {
    return { dependencies, body: `(${itemBodies.join(", ")})[]` };
  }
  return { dependencies, body: `${itemBodies.join(", ")}[]` };
}

// src/utils/generateIndentation.ts
function generateIndentation(count, size = 2) {
  if (count < 1 || size < 1) return "";
  return Array(count * size).fill(" ").join("");
}

// src/core/handleObjectType.ts
function handleObjectType(schema, indentation) {
  if (schema.type !== "object") throw new Error("Schema type must be 'object'");
  const dependencies = [];
  const propertyBodies = {};
  const propertyDescriptions = {};
  for (const [propertyName, property] of Object.entries(schema.properties ?? {})) {
    const propertyDefinition = generateTypeDefinition(property, indentation + 1);
    dependencies.push(...propertyDefinition.dependencies);
    propertyBodies[propertyName] = propertyDefinition.body;
    if (property.description) {
      propertyDescriptions[propertyName] = property.description;
    }
  }
  const isRequired = (propertyName) => (schema.required ?? []).includes(propertyName);
  const properties = Object.keys(schema.properties ?? {}).map((propertyName) => [
    "/**",
    ` * ${propertyDescriptions[propertyName] ?? "missing-description"}`,
    " */",
    `${propertyName}${isRequired(propertyName) ? "" : "?"}: ${propertyBodies[propertyName]},`
  ].map((line) => generateIndentation(indentation + 1) + line).join("\n"));
  return {
    dependencies,
    body: ["{", properties.join("\n"), "}"].join("\n")
  };
}

// src/core/handleStringType.ts
function handleStringType(schema) {
  if (schema.type !== "string") throw new Error("Schema type must be 'string'");
  if (schema.enum) {
    return {
      dependencies: [],
      body: schema.enum.map((item) => `"${item}"`).join(" | ")
    };
  }
  return {
    dependencies: [],
    body: "string"
  };
}

// src/core/handleUnionType.ts
function handleUnionType(schemas) {
  const dependencies = [];
  const itemBodies = [];
  for (const item of schemas) {
    const itemDefinition = generateTypeDefinition(item);
    dependencies.push(...itemDefinition.dependencies);
    itemBodies.push(itemDefinition.body);
  }
  if (itemBodies.length > 1) {
    return { dependencies, body: `(${itemBodies.join(" | ")})` };
  }
  return { dependencies, body: itemBodies.join(" | ") };
}

// src/core/generateTypeDefinition.ts
function generateTypeDefinition(schema, indentation = 0) {
  if ("$ref" in schema) {
    const [_, __, _category, componentName] = schema.$ref.split("/");
    if (!componentName) throw new Error("Invalid $ref in schema");
    return {
      dependencies: [componentName],
      body: componentName
    };
  }
  if (schema.anyOf) return handleUnionType(schema.anyOf);
  if (schema.oneOf) return handleUnionType(schema.oneOf);
  switch (schema.type) {
    case "null":
      return {
        dependencies: [],
        body: "null"
      };
    case "boolean":
      return {
        dependencies: [],
        body: "boolean"
      };
    case "integer":
    case "number":
      return {
        dependencies: [],
        body: "number"
      };
    case "string":
      return handleStringType(schema);
    case "object":
      return handleObjectType(schema, indentation);
    case "array":
      return handleArrayType(schema);
    default:
      return {
        dependencies: [],
        body: "unknown"
      };
  }
}
export {
  generateTypeDefinition
};