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/**
* TrackerMap
* Copyright (C) 2021-2022 Iván Ávalos <avalos@disroot.org>, Henoch Ojeda <imhenoch@protonmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package mx.trackermap.TrackerMap.client.infrastructure
import io.ktor.client.*
import io.ktor.client.call.*
import io.ktor.client.plugins.*
import io.ktor.client.plugins.contentnegotiation.*
import io.ktor.client.plugins.logging.*
import io.ktor.client.request.*
import io.ktor.client.request.forms.*
import io.ktor.client.statement.*
import io.ktor.http.*
import io.ktor.serialization.kotlinx.json.*
import io.ktor.util.*
import kotlinx.serialization.json.Json as KotlinJson
open class ApiClient(
val sessionManager: SessionManager
) {
companion object {
protected const val ApiContentType = "Content-Type"
protected const val ApiAccept = "Accept"
protected const val ApiJsonMediaType = "application/json"
protected const val ApiFormDataMediaType = "multipart/form-data"
protected const val ApiFormURLType = "application/x-www-form-urlencoded"
protected const val ApiXmlMediaType = "application/xml"
val client: HttpClient = HttpClientProvider().getHttpClient().config {
install(HttpTimeout) {
connectTimeoutMillis = 20_000
requestTimeoutMillis = 20_000
}
install(ContentNegotiation) {
json(KotlinJson {
ignoreUnknownKeys = true
useAlternativeNames = false
})
}
install(Logging) {
logger = Logger.DEFAULT
level = LogLevel.INFO
}
}
val defaultHeaders: Map<String, String> =
mapOf(
ApiContentType to ApiJsonMediaType,
ApiAccept to ApiJsonMediaType
)
}
protected inline fun <reified T> fillRequest(
requestBuilder: HttpRequestBuilder,
content: T,
mediaType: String = ApiJsonMediaType
) {
when {
mediaType == ApiFormDataMediaType && content is Map<*, *> -> {
val parametersBuilder = ParametersBuilder()
content.forEach { map ->
if (map.key is String && map.value is String) {
parametersBuilder[map.key as String] = map.value as String
}
}
parametersBuilder.build()
requestBuilder.contentType(ContentType.MultiPart.FormData)
requestBuilder.setBody(parametersBuilder)
}
mediaType == ApiJsonMediaType -> {
requestBuilder.contentType(ContentType.Application.Json)
if (content != null) {
requestBuilder.setBody(content)
}
}
mediaType == ApiFormURLType && content is Map<*, *> -> {
val parametersBuilder = ParametersBuilder()
content.forEach { item ->
parametersBuilder[item.key as String] = item.value as String
}
requestBuilder.setBody(FormDataContent(parametersBuilder.build()))
}
mediaType == ApiXmlMediaType -> TODO("xml not currently supported.")
// TODO: this should be extended with other serializers
else -> TODO("requestBody currently only supports JSON body and File body.")
}
}
protected suspend inline fun <reified T : Any?> request(
requestConfig: RequestConfig,
body: Any? = null
): ApiInfrastructureResponse<T?> {
val httpUrl: Url
try {
httpUrl = Url(sessionManager.baseUrl)
} catch (e: URLDecodeException) {
throw IllegalStateException("baseUrl is invalid.")
}
val urlBuilder = URLBuilder(httpUrl)
urlBuilder.path("${httpUrl.encodedPath.trimStart('/')}${requestConfig.path}")
requestConfig.query.forEach { query ->
query.value.forEach { queryValue ->
urlBuilder.parameters.append(query.key, queryValue)
}
}
val url = urlBuilder.build()
val headers = defaultHeaders + requestConfig.headers
if ((headers[ApiContentType] ?: "") == "") {
throw IllegalStateException("Missing Content-Type header. This is required.")
}
if ((headers[ApiAccept] ?: "") == "") {
throw IllegalStateException("Missing Accept header. This is required.")
}
// TODO: support multiple contentType,accept options here.
val contentType = (headers[ApiContentType] as String).substringBefore(";").lowercase()
val accept = (headers[ApiAccept] as String).substringBefore(";").lowercase()
val request = HttpRequestBuilder()
request.url(url)
request.accept(ContentType.parse(accept))
when (requestConfig.method) {
RequestMethod.DELETE -> {
request.method = HttpMethod.Delete
}
RequestMethod.GET -> {
request.method = HttpMethod.Get
}
RequestMethod.HEAD -> {
request.method = HttpMethod.Head
}
RequestMethod.PATCH -> {
request.method = HttpMethod.Patch
fillRequest(request, body, contentType)
}
RequestMethod.PUT -> {
request.method = HttpMethod.Put
fillRequest(request, body, contentType)
}
RequestMethod.POST -> {
request.method = HttpMethod.Post
fillRequest(request, body, contentType)
}
RequestMethod.OPTIONS -> {
request.method = HttpMethod.Options
}
}
if (sessionManager.token.isNotEmpty()) {
request.headers["Cookie"] = sessionManager.token
}
val response: HttpResponse = client.request(request)
// TODO: handle specific mapping types. e.g. Map<int, Class<?>>
when (response.status.value) {
in 300..399 -> return Redirection(
response.status.value,
response.headers.toMap()
)
in 100..199 -> return Informational(
response.status.description,
response.status.value,
response.headers.toMap()
)
in 200..299 -> return Success(
response.body(),
response.status.value,
response.headers.toMap()
)
in 400..499 -> return ClientError(
response.body(),
response.status.value,
response.headers.toMap()
)
else -> return ServerError(
null,
response.body(),
response.status.value,
response.headers.toMap()
)
}
}
}
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