[+] Frontier endpoint

config/application.properties

@@ -122,4 +122,8 @@ aqua-net.geoip.ip-header=CF-Connecting-IP
 aqua-net.jwt.secret="Open Sesame!"
 
 ## Disable debug pages
-server.error.whitelabel.enabled=false
+server.error.whitelabel.enabled=false
+
+## Adapter for Frontier (For testing only, please keep this disabled)
+aqua-net.frontier.enable=false
+aqua-net.frontier.ftk=0x00

src/main/java/icu/samnyan/aqua/net/Frontier.kt

@@ -0,0 +1,46 @@
+package icu.samnyan.aqua.net
+
+import ext.API
+import ext.Doc
+import ext.RP
+import ext.minus
+import icu.samnyan.aqua.sega.general.service.CardService
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty
+import org.springframework.boot.context.properties.ConfigurationProperties
+import org.springframework.context.annotation.Configuration
+import org.springframework.web.bind.annotation.RestController
+
+@Configuration
+@ConfigurationProperties(prefix = "aqua-net.frontier")
+class FrontierProps {
+    var enabled: Boolean = false
+    var ftk: String = ""
+}
+
+@RestController
+@ConditionalOnProperty("aqua-net.frontier.enabled", havingValue = "true")
+@API("/api/v2/frontier")
+class Frontier(
+    val cardService: CardService,
+    val props: FrontierProps
+) {
+    fun String.checkFtk() {
+        if (this != props.ftk) 403 - "Invalid FTK"
+    }
+
+    @API("/register-card")
+    @Doc("Register a new card by access code", "Success message")
+    suspend fun registerCard(@RP ftk: String, @RP accessCode: String): Any {
+        ftk.checkFtk()
+
+        return cardService.registerByAccessCode(accessCode)
+    }
+
+    @API("/lookup-card")
+    @Doc("Lookup a card by access code", "Card information")
+    suspend fun lookupCard(@RP ftk: String, @RP accessCode: String): Any {
+        ftk.checkFtk()
+
+        return cardService.tryLookup(accessCode) ?: (404 - "Card not found")
+    }
+}