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refactor: Rewrite wallet functionality to mach app code style
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api/agata/src/androidMain/kotlin/cz/lastaapps/menza/api/agata/api/AgataWallet.kt
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...agata/src/androidMain/kotlin/cz/lastaapps/menza/api/agata/api/AndroidAgataCtuWalletApi.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,181 @@ | ||
| /* | ||
| * Copyright 2023, Petr Laštovička as Lasta apps, All rights reserved | ||
| * | ||
| * This file is part of Menza. | ||
| * | ||
| * Menza is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * Menza 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 General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with Menza. If not, see <https://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| package cz.lastaapps.menza.api.agata.api | ||
|
|
||
| import arrow.core.Either | ||
| import arrow.core.Either.Left | ||
| import arrow.core.Either.Right | ||
| import arrow.core.flatten | ||
| import arrow.core.left | ||
| import arrow.core.raise.nullable | ||
| import arrow.core.right | ||
| import cz.lastaapps.core.domain.Outcome | ||
| import cz.lastaapps.core.domain.error.ApiError.WalletError | ||
| import cz.lastaapps.core.util.extensions.catchingNetwork | ||
| import io.ktor.client.HttpClient | ||
| import io.ktor.client.plugins.BrowserUserAgent | ||
| import io.ktor.client.request.forms.FormDataContent | ||
| import io.ktor.client.request.get | ||
| import io.ktor.client.request.header | ||
| import io.ktor.client.request.post | ||
| import io.ktor.client.request.setBody | ||
| import io.ktor.client.statement.bodyAsText | ||
| import io.ktor.http.Cookie | ||
| import io.ktor.http.HttpHeaders | ||
| import io.ktor.http.Parameters | ||
| import it.skrape.core.htmlDocument | ||
| import java.net.URLDecoder | ||
|
|
||
| internal class AndroidAgataCtuWalletApi( | ||
| httpClient: HttpClient, | ||
| ) : AgataCtuWalletApi { | ||
|
|
||
| private val client: HttpClient | ||
|
|
||
| init { | ||
| client = httpClient.config { | ||
| // Disable redirects, because when I was testing it with Python I got into loop sometimes | ||
| // Also it has to extract some cookies from some of the requests, so redirects manually handled | ||
| followRedirects = false | ||
| // Because of many redirects | ||
| expectSuccess = false | ||
|
|
||
| BrowserUserAgent() | ||
| } | ||
| } | ||
|
|
||
| // Get balance from Agata | ||
| // Originally written by Marekkon5 | ||
| override suspend fun getBalance( | ||
| username: String, | ||
| password: String, | ||
| ): Outcome<Float> = catchingNetwork { | ||
| nullable { | ||
| // Go to the auth provider | ||
| client.get("https://agata.suz.cvut.cz/secure/index.php") | ||
| .headers[HttpHeaders.Location] | ||
| .bind() | ||
| .let { url -> client.get(url) } | ||
|
|
||
| // Get new url params | ||
| .let { request -> | ||
| val body = request.bodyAsText() | ||
| val returnUrl = Regex("var returnURL = \"(.+?)\"") | ||
| .find(body)?.groups?.get(1)?.value.bind() | ||
| val otherParams = Regex("var otherParams = \"(.+?)\"") | ||
| .find(body)?.groups?.get(1)?.value.bind() | ||
| "${returnUrl}&entityID=https://idp2.civ.cvut.cz/idp/shibboleth${otherParams}" | ||
| } | ||
| // Get to SSO | ||
| .let { url -> client.get(url).headers[HttpHeaders.Location].bind() } | ||
| .let { sso -> client.get(sso) } | ||
| .let { ssoResponse -> | ||
| // Extract JSESSIONID cookie | ||
| val jsessionid = ssoResponse.headers[HttpHeaders.SetCookie] | ||
| ?.split(";") | ||
| ?.firstOrNull() | ||
| ?.split("=") | ||
| ?.getOrNull(1) | ||
| .bind() | ||
|
|
||
| // Resolve SSO | ||
| val url = | ||
| "https://idp2.civ.cvut.cz${ssoResponse.headers[HttpHeaders.Location]}" | ||
|
|
||
| // result ignored, must happen | ||
| client.get(url) | ||
|
|
||
| client.post(url) { | ||
| setBody( | ||
| FormDataContent( | ||
| Parameters.build { | ||
| append("j_username", username) | ||
| append("j_password", password) | ||
| append("_eventId_proceed", "") | ||
| }, | ||
| ), | ||
| ) | ||
| Cookie("JSESSIONID", jsessionid) | ||
| header(HttpHeaders.Referrer, url) | ||
| header(HttpHeaders.ContentType, "application/x-www-form-urlencoded") | ||
| } | ||
| } | ||
|
|
||
| // Extract response codes from html | ||
| .let { htmlDocument(it.bodyAsText()) } | ||
| .let { html -> | ||
| var relayState: String? = null | ||
| var samlResponse: String? = null | ||
|
|
||
| val inputField = Either.catch { | ||
| html.findAll("input") | ||
| } | ||
| when (inputField) { | ||
| is Left -> return@catchingNetwork WalletError.InvalidCredentials.left() | ||
| is Right -> inputField.value | ||
| }.forEach { | ||
| if (it.attribute("name") == "RelayState") { | ||
| relayState = URLDecoder.decode(it.attribute("value"), "UTF-8") | ||
| } | ||
| if (it.attribute("name") == "SAMLResponse") { | ||
| samlResponse = it.attribute("value") | ||
| } | ||
| } | ||
|
|
||
| // Send the shit back to Agata and get session cookie | ||
| val response = | ||
| client.post("https://agata.suz.cvut.cz/Shibboleth.sso/SAML2/POST") { | ||
| setBody( | ||
| FormDataContent( | ||
| Parameters.build { | ||
| append("RelayState", relayState.bind()) | ||
| append("SAMLResponse", samlResponse.bind()) | ||
| }, | ||
| ), | ||
| ) | ||
| header(HttpHeaders.Referrer, "https://idp2.civ.cvut.cz/") | ||
| } | ||
|
|
||
| response.headers[HttpHeaders.SetCookie] | ||
| ?.split(";") | ||
| ?.getOrNull(0) | ||
| .bind() | ||
| }.let { sessionCookie -> | ||
| // Get balance from Agata | ||
| client.get("https://agata.suz.cvut.cz/secure/index.php") { | ||
| // The session cookie has variable name, so using raw headers here | ||
| header("Cookie", sessionCookie) | ||
| } | ||
| }.let { finalResponse -> | ||
| val html = htmlDocument(finalResponse.bodyAsText()) | ||
|
|
||
| // Parse | ||
| html.findFirst("h4 span.badge").text | ||
| .lowercase() | ||
| .replace("kč", "") | ||
| .replace(",", ".") | ||
| .replace(" ", "") | ||
| .trim() | ||
| .toFloatOrNull() | ||
| .bind() | ||
| } | ||
| }?.right() ?: WalletError.TotallyBroken.left() | ||
| }.flatten() | ||
| } |
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