MicroUtils/koin/generator/src/main/kotlin/Processor.kt

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2023-02-21 19:34:42 +00:00
package dev.inmo.micro_utils.koin.generator
import com.google.devtools.ksp.KSTypeNotPresentException
import com.google.devtools.ksp.KSTypesNotPresentException
import com.google.devtools.ksp.KspExperimental
import com.google.devtools.ksp.getAnnotationsByType
import com.google.devtools.ksp.processing.CodeGenerator
import com.google.devtools.ksp.processing.Resolver
import com.google.devtools.ksp.processing.SymbolProcessor
import com.google.devtools.ksp.symbol.KSAnnotated
import com.google.devtools.ksp.symbol.KSFile
import com.squareup.kotlinpoet.ClassName
import com.squareup.kotlinpoet.FileSpec
import com.squareup.kotlinpoet.FunSpec
import com.squareup.kotlinpoet.ParameterSpec
import com.squareup.kotlinpoet.ParameterizedTypeName.Companion.parameterizedBy
import com.squareup.kotlinpoet.PropertySpec
import com.squareup.kotlinpoet.asTypeName
import com.squareup.kotlinpoet.ksp.toClassName
import com.squareup.kotlinpoet.ksp.toTypeName
import com.squareup.kotlinpoet.ksp.writeTo
import dev.inmo.micro_utils.koin.annotations.GenerateKoinDefinition
import org.koin.core.Koin
import org.koin.core.module.Module
import org.koin.core.scope.Scope
import java.io.File
import kotlin.reflect.KClass
class Processor(
private val codeGenerator: CodeGenerator
) : SymbolProcessor {
private val definitionClassName = ClassName("org.koin.core.definition", "Definition")
private val koinDefinitionClassName = ClassName("org.koin.core.definition", "KoinDefinition")
@OptIn(KspExperimental::class)
override fun process(resolver: Resolver): List<KSAnnotated> {
resolver.getSymbolsWithAnnotation(
GenerateKoinDefinition::class.qualifiedName!!
).filterIsInstance<KSFile>().forEach { ksFile ->
FileSpec.builder(
ksFile.packageName.asString(),
"GeneratedDefinitions${ksFile.fileName.removeSuffix(".kt")}"
).apply {
addFileComment(
"""
THIS CODE HAVE BEEN GENERATED AUTOMATICALLY
TO REGENERATE IT JUST DELETE FILE
ORIGINAL FILE: ${ksFile.fileName}
""".trimIndent()
)
ksFile.getAnnotationsByType(GenerateKoinDefinition::class).forEach {
val type = runCatching {
it.type.asTypeName()
}.getOrElse { e ->
if (e is KSTypeNotPresentException) {
e.ksType.toClassName()
} else {
throw e
}
}
val targetType = runCatching {
type.parameterizedBy(*(it.typeArgs.takeIf { it.isNotEmpty() } ?.map { it.asTypeName() } ?.toTypedArray() ?: return@runCatching type))
}.getOrElse { e ->
when (e) {
is KSTypeNotPresentException -> e.ksType.toClassName()
}
if (e is KSTypesNotPresentException) {
type.parameterizedBy(*e.ksTypes.map { it.toTypeName() }.toTypedArray())
} else {
throw e
}
}.copy(
nullable = it.nullable
)
fun addGetterProperty(
receiver: KClass<*>
) {
addProperty(
PropertySpec.builder(
it.name,
targetType,
).apply {
addKdoc(
"""
@return Definition by key "${it.name}"
""".trimIndent()
)
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getter(
FunSpec.getterBuilder().apply {
addCode(
"return " + (if (it.nullable) {
"getOrNull"
} else {
"get"
}) + "(named(\"${it.name}\"))"
)
}.build()
)
receiver(receiver)
}.build()
)
}
addGetterProperty(Scope::class)
addGetterProperty(Koin::class)
if (it.generateSingle) {
addFunction(
FunSpec.builder("${it.name}Single").apply {
addKdoc(
"""
Will register [definition] with [org.koin.core.module.Module.single] and key "${it.name}"
""".trimIndent()
)
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receiver(Module::class)
addParameter(
ParameterSpec.builder(
"createdAtStart",
Boolean::class
).apply {
defaultValue("false")
}.build()
)
addParameter(
ParameterSpec.builder(
"definition",
definitionClassName.parameterizedBy(targetType.copy(nullable = false))
).build()
)
returns(koinDefinitionClassName.parameterizedBy(targetType.copy(nullable = false)))
addCode(
"return single(named(\"${it.name}\"), createdAtStart = createdAtStart, definition = definition)"
)
}.build()
)
}
if (it.generateFactory) {
addFunction(
FunSpec.builder("${it.name}Factory").apply {
addKdoc(
"""
Will register [definition] with [org.koin.core.module.Module.factory] and key "${it.name}"
""".trimIndent()
)
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receiver(Module::class)
addParameter(
ParameterSpec.builder(
"definition",
definitionClassName.parameterizedBy(targetType.copy(nullable = false))
).build()
)
returns(koinDefinitionClassName.parameterizedBy(targetType.copy(nullable = false)))
addCode(
"return factory(named(\"${it.name}\"), definition = definition)"
)
}.build()
)
}
addImport("org.koin.core.qualifier", "named")
}
}.build().let {
File(
File(ksFile.filePath).parent,
"GeneratedDefinitions${ksFile.fileName}"
).takeIf { !it.exists() } ?.apply {
parentFile.mkdirs()
writer().use { writer ->
it.writeTo(writer)
}
}
}
}
return emptyList()
}
}