spice.openapi.generator.dart.OpenAPIDartGenerator.scala Maven / Gradle / Ivy
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package spice.openapi.generator.dart
import cats.effect.unsafe.implicits.global
import fabric.{Json, Str}
import spice.http.HttpMethod
import spice.net.ContentType
import spice.openapi.{OpenAPI, OpenAPIContent, OpenAPISchema}
import spice.openapi.generator.{OpenAPIGenerator, OpenAPIGeneratorConfig, SourceFile}
import spice.streamer._
import scala.collection.mutable
object OpenAPIDartGenerator extends OpenAPIGenerator {
private lazy val ModelTemplate: String = loadString("generator/dart/model.template")
private lazy val ModelWithParamsTemplate: String = loadString("generator/dart/model_with_params.template")
private lazy val ParentTemplate: String = loadString("generator/dart/parent.template")
private lazy val EnumTemplate: String = loadString("generator/dart/enum.template")
private lazy val ServiceTemplate: String = loadString("generator/dart/service.template")
override protected def fileExtension: String = ".dart"
override protected def generatedComment: String = "/// GENERATED CODE: Do not edit!"
private implicit class StringExtras(s: String) {
def ref2Type: String = s.substring(s.lastIndexOf('/') + 1)
def type2File: String = {
val pre = s.charAt(0).toLower
val suffix = "\\p{Lu}".r.replaceAllIn(s.substring(1), m => {
s"_${m.group(0).toLowerCase}"
})
s"$pre$suffix".replace(" ", "")
}
def dartType: String = s match {
case "string" => "String"
case "boolean" => "bool"
case "integer" => "int"
case "number" => "double"
case "json" => "Map"
// case "object" => "FAILURE" // TODO: Fix
case _ => throw new RuntimeException(s"Unsupported dart type: [$s]")
}
def param: String = s"this.$prop"
def prop: String = renameMap.getOrElse(s, s)
}
private implicit class OpenAPIContentExtras(content: OpenAPIContent) {
def ref: OpenAPISchema.Ref = content
.content
.head
._2
.schema
.asInstanceOf[OpenAPISchema.Ref]
def refType: String = ref.ref.ref2Type
def component(api: OpenAPI): OpenAPISchema.Component = {
val componentName = ref.ref.substring(ref.ref.lastIndexOf('/') + 1)
api.components.get.schemas(componentName).asInstanceOf[OpenAPISchema.Component]
}
}
private lazy val renameMap = Map(
"bool" -> "b",
"_id" -> "id"
)
private def field(`type`: String, name: String, nullable: Boolean): String = {
val rename = renameMap.get(name)
val n = if (nullable) "?" else ""
rename match {
case Some(r) => s"@JsonKey(name: '$name') final ${`type`}$n $r;"
case None => s"final ${`type`}$n $name;"
}
}
override def generate(api: OpenAPI, config: OpenAPIGeneratorConfig): List[SourceFile] = {
val service = generateService(api, config)
val modelObjects = generatePaths(api, config)
service :: modelObjects
}
private var parentFiles = Map.empty[String, SourceFile]
def generatePaths(api: OpenAPI, config: OpenAPIGeneratorConfig): List[SourceFile] = {
parentFiles = Map.empty
val sourceFiles = api.components.toList.flatMap(_.schemas.toList).map {
case (typeName, schema: OpenAPISchema.Component) => parseComponent(typeName, schema, api, config)
case (typeName, schema) => throw new UnsupportedOperationException(s"$typeName has unsupported schema: $schema")
}
sourceFiles ::: parentFiles.values.toList
}
private def parseComponent(rawTypeName: String, schema: OpenAPISchema.Component, api: OpenAPI, config: OpenAPIGeneratorConfig): SourceFile = {
val imports = mutable.Set.empty[String]
val typeName: String = rawTypeName.replace(" ", "")
val fileName: String = s"${typeName.type2File}.dart"
val fields: List[String] = schema.properties.toList.map {
case (fieldName, schema) => parseField(fieldName, schema, api, config, imports).toString
}
val fieldsString = fields.mkString("\n ") match {
case "" => "// No fields defined"
case s => s
}
val parent = config.baseForTypeMap.get(rawTypeName)
val extending = parent match {
case Some(parentName) =>
imports += parentName.type2File
s"extends $parentName with EquatableMixin "
case None => "extends Equatable "
}
val importsTemplate = imports.toList.sorted.map(s => s"import '$s.dart';").mkString("\n") match {
case "" => "// No imports necessary"
case s => s
}
val paramsList = schema.properties.toList.map {
case (fieldName, schema) =>
val nullable = schema match {
case s: OpenAPISchema.Component => s.nullable.getOrElse(false)
case s: OpenAPISchema.Ref => s.nullable.getOrElse(false)
case s: OpenAPISchema.OneOf => s.nullable.getOrElse(false)
case _ => throw new RuntimeException(s"Unsupported OpenAPISchema: $schema")
}
if (nullable) {
fieldName.param
} else {
s"required ${fieldName.param}"
}
}
val params = if (paramsList.nonEmpty) {
paramsList.mkString("{", ", ", "}")
} else {
""
}
val props = schema.properties.toList.map(_._1.prop).mkString(", ")
val toJson = parent match {
case Some(_) =>
s"""@override Map toJson() {
| Map map = _$$${typeName}ToJson(this);
| map['type'] = '$rawTypeName';
| return map;
| }""".stripMargin
case None => s"Map toJson() => _$$${typeName}ToJson(this);"
}
val source = (if (params.isEmpty) ModelTemplate else ModelWithParamsTemplate)
.replace("%%IMPORTS%%", importsTemplate)
.replace("%%FILENAME%%", typeName.type2File)
.replace("%%CLASSNAME%%", typeName)
.replace("%%EXTENDS%%", extending)
.replace("%%FIELDS%%", fieldsString)
.replace("%%PARAMS%%", params)
.replace("%%PROPS%%", props)
.replace("%%TOJSON%%", toJson)
SourceFile(
language = "Dart",
name = typeName,
fileName = fileName,
path = "lib/model",
source = source
)
}
private def parseField(fieldName: String,
schema: OpenAPISchema,
api: OpenAPI,
config: OpenAPIGeneratorConfig,
imports: mutable.Set[String]): ParsedField = schema match {
case c: OpenAPISchema.Component if c.`enum`.nonEmpty =>
val parentName = config.baseForTypeMap.getOrElse(c.`enum`.head.asString, throw new NullPointerException(s"Unable to find enum entry ${c.`enum`.head} for $fieldName"))
val `enum` = c.`enum`.map {
case Str(s, _) => s
case json => throw new UnsupportedOperationException(s"Enum only supports Str: $json")
}
imports += parentName.type2File
addParent(api, config, parentName, `enum`)
ParsedField(parentName, fieldName, c.nullable.getOrElse(false))
case c: OpenAPISchema.Component if c.`type` == "array" =>
val item = parseField(fieldName, c.items.get, api, config, imports)
item.copy(
`type` = s"List<${item.`type`}>",
nullable = c.nullable.getOrElse(false)
)
case c: OpenAPISchema.Component if c.`type` == "object" =>
val fieldType = if (c.`enum`.nonEmpty) {
val `enum` = c.`enum`.map {
case Str(s, _) => s
case json => throw new UnsupportedOperationException(s"Enum only supports Str: $json")
}
val baseType = config.baseForTypeMap.getOrElse(`enum`.head, throw new RuntimeException(s"No mapping defined for ${`enum`.head} ($fieldName)"))
imports += baseType.type2File
addParent(api, config, baseType, `enum`)
baseType.dartType
} else if (c.`type` == "object" && c.additionalProperties.nonEmpty) {
val additionalField = parseField(
fieldName = fieldName,
schema = c.additionalProperties.get,
api = api,
config = config,
imports = imports
)
s"Map"
} else {
c.`type`.dartType
}
ParsedField(fieldType, fieldName, c.nullable.getOrElse(false))
case c: OpenAPISchema.Component =>
ParsedField(c.`type`.dartType, fieldName, c.nullable.getOrElse(false))
case c: OpenAPISchema.Ref =>
val modelType = c.ref.ref2Type
imports += modelType.type2File
ParsedField(modelType, fieldName, c.nullable.getOrElse(false))
case c: OpenAPISchema.OneOf =>
val refs = c.schemas.map(_.asInstanceOf[OpenAPISchema.Ref].ref.ref2Type)
val parents: List[String] = refs.map(r => config.baseForTypeMap.getOrElse(r, throw new RuntimeException(s"No mapping defined for $r"))).distinct
val parentName = parents match {
case parent :: Nil => parent
case _ => throw new RuntimeException(s"Multiple parents found for ${refs.mkString(", ")}: ${parents.mkString(", ")}")
}
val parentType = parentName.type2File
imports += parentType
addParent(api, config, parentName)
ParsedField(parentName, fieldName, c.nullable.getOrElse(false))
case _ => throw new UnsupportedOperationException(s"Schema for '$fieldName' is unsupported: $schema")
}
private def addParent(api: OpenAPI, config: OpenAPIGeneratorConfig, tn: String, `enum`: List[String] = Nil): Unit = {
val typeName = tn.replace(" ", "")
if (!parentFiles.contains(typeName)) {
if (`enum`.nonEmpty) {
val fileName = s"${typeName.type2File}.dart"
val fields = `enum`.map { e =>
s"""@JsonValue('$e')
| ${e.replace(" ", "")},""".stripMargin
}.mkString("\n ")
val source = EnumTemplate
.replace("%%FILENAME%%", typeName.type2File)
.replace("%%CLASSNAME%%", typeName)
.replace("%%FIELDS%%", fields)
parentFiles += typeName -> SourceFile(
language = "Dart",
name = typeName,
fileName = fileName,
path = "lib/model",
source = source
)
} else {
val children = config.baseNames.find(_._1 == typeName).get._2.toList.sorted
var imports = children.toSet
val maps = children.map { child =>
val components = api.components.get
val component = components
.schemas.getOrElse(child, throw new NullPointerException(s"Unable to find $child in ${components.schemas.keys.mkString(", ")}"))
.asInstanceOf[OpenAPISchema.Component]
component.properties.map {
case (key, schema) =>
val `type` = schema match {
case c: OpenAPISchema.Component if c.`type` == "array" => c.items.get match {
case c: OpenAPISchema.Component if c.`enum`.nonEmpty =>
val parentName = config.baseForTypeMap(c.`enum`.head.asString)
val `enum` = c.`enum`.map {
case Str(s, _) => s
case json => throw new UnsupportedOperationException(s"Enum only supports Str: $json")
}
imports = imports + parentName.type2File
addParent(api, config, parentName, `enum`)
if (c.nullable.contains(true)) {
s"List<$parentName>?"
} else {
s"List<$parentName>"
}
case c: OpenAPISchema.Component if c.nullable.contains(true) => s"List<${c.`type`.dartType}>?"
case c: OpenAPISchema.Component => s"List<${c.`type`.dartType}>"
case r: OpenAPISchema.Ref =>
val c = r.ref.substring(r.ref.lastIndexOf('/') + 1)
imports += c
val s = s"List<$c>"
if (r.nullable.contains(true)) {
s"$s?"
} else {
s
}
case o: OpenAPISchema.OneOf =>
val refs = o.schemas.map(_.asInstanceOf[OpenAPISchema.Ref].ref.ref2Type)
val parents: List[String] = refs.map(r => config.baseForTypeMap.getOrElse(r, throw new RuntimeException(s"No mapping defined for $r"))).distinct
val parentName = parents match {
case parent :: Nil => parent
case _ => throw new RuntimeException(s"Multiple parents found for ${refs.mkString(", ")}: ${parents.mkString(", ")}")
}
val c = parentName.type2File
imports = imports + c
addParent(api, config, parentName)
val s = s"List<$c>"
if (o.nullable.contains(true)) {
s"$s?"
} else {
s
}
case s => throw new UnsupportedOperationException(s"Unsupported array schema: $s")
}
case c: OpenAPISchema.Component if c.`enum`.nonEmpty =>
val parentName = config.baseForTypeMap(c.`enum`.head.asString)
val `enum` = c.`enum`.map {
case Str(s, _) => s
case json => throw new UnsupportedOperationException(s"Enum only supports Str: $json")
}
imports = imports + parentName.type2File
addParent(api, config, parentName, `enum`)
if (c.nullable.contains(true)) {
s"$parentName?"
} else {
parentName
}
case c: OpenAPISchema.Component if c.nullable.contains(true) => s"${c.`type`.dartType}?"
case c: OpenAPISchema.Component => c.`type`.dartType
case r: OpenAPISchema.Ref =>
val c = r.ref.substring(r.ref.lastIndexOf('/') + 1)
imports += c
if (r.nullable.contains(true)) {
s"$c?"
} else {
c
}
case s => throw new RuntimeException(s"Unsupported schema: $s")
}
val k = key match {
case "_id" => "id"
case _ => key
}
k -> `type`
}
}
val commonKeys = maps.map(_.keySet).reduce(_ intersect _)
val baseParams = commonKeys.map(key => key -> maps.head(key)).toMap
val fields = baseParams.toList.map {
case (key, value) => s"$value get $key;";
}.mkString("\n ")
val fileName = s"${typeName.type2File}.dart"
val importString = imports.map { c =>
s"import '${c.type2File}.dart';"
}.mkString("\n")
val fromJson = children.map { c =>
s"""if (t == '$c') {
| return ${c.replace(" ", "")}.fromJson(json);
| }""".stripMargin
}.mkString(" ", " else ",
""" else {
| throw Exception("Unsupported type: $t");
| }""".stripMargin)
val source = ParentTemplate
.replace("%%CLASSNAME%%", typeName)
.replace("%%FIELDS%%", fields)
.replace("%%IMPORTS%%", importString)
.replace("%%FROMJSON%%", fromJson)
parentFiles += typeName -> SourceFile(
language = "Dart",
name = typeName,
fileName = fileName,
path = "lib/model",
source = source
)
}
}
}
def generateService(api: OpenAPI, config: OpenAPIGeneratorConfig): SourceFile = {
var imports = Set.empty[String]
val methods: List[String] = api.paths.toList.sortBy(_._1).map {
case (pathString, path) =>
val name = "[^a-zA-Z0-9](\\S)".r.replaceAllIn(pathString.substring(1), m => {
m.group(1).toUpperCase
})
val entry = path.methods(HttpMethod.Post)
val requestContent = entry.requestBody.get.content
val (requestContentType, apiContentType) = requestContent.content.head
val successResponse = entry
.responses("200")
.content
val (_, apiPath) = successResponse.content.head
apiPath.schema match {
case c: OpenAPISchema.Component => c.format match {
case Some("binary") =>
val requestType = requestContent.refType
imports = imports + requestType.type2File
s""" /// ${entry.description}
| static Future $name($requestType request, String fileName) async {
| await restDownload(fileName, "$pathString", request.toJson());
| }""".stripMargin
case format => throw new RuntimeException(s"Unsupported schema format: $format (schema: $c, path: $pathString)")
}
case c: OpenAPISchema.Ref if c.ref == "#/components/schemas/Content" =>
val requestType = requestContent.refType
imports = imports + requestType.type2File
s""" /// ${entry.description}
| static Future $name($requestType request, String fileName) async {
| await restDownload(fileName, "$pathString", request.toJson());
| }""".stripMargin
case _: OpenAPISchema.Ref =>
val responseType = successResponse.refType
val component = successResponse.component(api)
val binary = component.format.contains("binary")
imports = imports + responseType.type2File
if (requestContentType == ContentType.`multipart/form-data`) {
apiContentType.schema match {
case c: OpenAPISchema.Component =>
val params = c.properties.toList.map {
case (key, schema) =>
val paramType = schema match {
case child: OpenAPISchema.Component if child.format.contains("binary") => "PlatformFile"
case child: OpenAPISchema.Component if child.`enum`.nonEmpty =>
val parentName = config.baseForTypeMap.getOrElse(child.`enum`.head.asString, throw new NullPointerException(s"Unable to find enum entry ${child.`enum`.head} for $key"))
imports += parentName.type2File
parentName
case child: OpenAPISchema.Component => s"${child.`type`.dartType}"
case ref: OpenAPISchema.Ref => ref.ref.ref2Type
case _ => throw new UnsupportedOperationException(s"Unsupported schema for $key: $schema")
}
s"$paramType $key"
}.mkString(", ")
val ws = " "
val conversions = c.properties.toList.map {
case (key, schema: OpenAPISchema.Component) =>
if (schema.format.contains("binary")) {
s"${ws}request.files.add(http.MultipartFile.fromBytes('$key', $key.bytes!, filename: $key.name));"
} else {
s"${ws}request.fields['$key'] = json.encode($key);"
}
case (key, ref: OpenAPISchema.Ref) =>
imports = imports + ref.ref.ref2Type.type2File
s"${ws}request.fields['$key'] = json.encode($key.toJson());"
case (key, schema) => throw new UnsupportedOperationException(s"Unable to support $key: $schema")
}.mkString("\n")
s""" /// ${entry.description}
| static Future<$responseType> $name($params) async {
| return await multiPart(
| "$pathString",
| (request) {
|$conversions
| },
| $responseType.fromJson
| );
| }""".stripMargin
case _ => throw new UnsupportedOperationException(s"Unsupported schema: ${apiContentType.schema}")
}
} else if (binary) {
val requestType = requestContent.refType
imports = imports + requestType.type2File
s""" /// ${entry.description}
| static Future $name($requestType request) async {
| return await restDownload(
| downloadFileName,
| "$pathString",
| request.toJson()
| );
| }""".stripMargin
} else {
val requestType = requestContent.refType
imports = imports + requestType.type2File
s""" /// ${entry.description}
| static Future<$responseType> $name($requestType request) async {
| return await restful(
| "$pathString",
| request.toJson(),
| $responseType.fromJson
| );
| }""".stripMargin
}
case schema => throw new RuntimeException(s"Unsupported schema: $schema")
}
}
val importsTemplate = imports.toList.sorted.map(s => s"import 'model/$s.dart';").mkString("\n")
val methodsTemplate = methods.mkString("\n\n")
val source = ServiceTemplate
.replace("%%IMPORTS%%", importsTemplate)
.replace("%%SERVICES%%", methodsTemplate)
SourceFile(
language = "Dart",
name = "Service",
fileName = "service.dart",
path = "lib",
source = source
)
}
def loadString(name: String): String = {
val stream = getClass.getClassLoader.getResourceAsStream(name)
if (stream == null) throw new RuntimeException(s"Not found: $name")
Streamer(
stream,
new mutable.StringBuilder
).unsafeRunSync().toString
}
case class ParsedField(`type`: String, name: String, nullable: Boolean) {
override def toString: String = field(`type`, name, nullable)
}
} © 2015 - 2024 Weber Informatics LLC | Privacy Policy