Add repository overview endpoint

src/main/kotlin/de/ruvnox/tactical/Main.kt

@@ -1,6 +1,7 @@
 package de.ruvnox.tactical
 
 import de.ruvnox.tactical.api.statusRoutes
+import de.ruvnox.tactical.api.systemRoutes
 import io.ktor.server.application.Application
 import io.ktor.server.application.install
 import io.ktor.server.engine.embeddedServer
@@ -35,5 +36,6 @@ fun Application.module() {
 
     routing {
         statusRoutes()
+        systemRoutes()
     }
 }

src/main/kotlin/de/ruvnox/tactical/api/SystemDtos.kt

@@ -0,0 +1,20 @@
+package de.ruvnox.tactical.api
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class CountSummaryResponse(
+    val total: Long,
+    val active: Long
+)
+
+@Serializable
+data class SystemOverviewResponse(
+    val service: String,
+    val status: String,
+    val users: CountSummaryResponse,
+    val devices: CountSummaryResponse,
+    val operationRooms: CountSummaryResponse,
+    val messages: Long,
+    val auditEvents: Long
+)

src/main/kotlin/de/ruvnox/tactical/api/SystemRoutes.kt

@@ -0,0 +1,35 @@
+package de.ruvnox.tactical.api
+
+import de.ruvnox.tactical.repository.AuditEventRepository
+import de.ruvnox.tactical.repository.DeviceRepository
+import de.ruvnox.tactical.repository.MessageRepository
+import de.ruvnox.tactical.repository.OperationRoomRepository
+import de.ruvnox.tactical.repository.UserRepository
+import io.ktor.server.response.respond
+import io.ktor.server.routing.Route
+import io.ktor.server.routing.get
+
+fun Route.systemRoutes() {
+    get("/api/v1/system/overview") {
+        call.respond(
+            SystemOverviewResponse(
+                service = "ruvnox-tactical-server",
+                status = "online",
+                users = CountSummaryResponse(
+                    total = UserRepository.countTotal(),
+                    active = UserRepository.countActive()
+                ),
+                devices = CountSummaryResponse(
+                    total = DeviceRepository.countTotal(),
+                    active = DeviceRepository.countActive()
+                ),
+                operationRooms = CountSummaryResponse(
+                    total = OperationRoomRepository.countTotal(),
+                    active = OperationRoomRepository.countActive()
+                ),
+                messages = MessageRepository.countTotal(),
+                auditEvents = AuditEventRepository.countTotal()
+            )
+        )
+    }
+}

src/main/kotlin/de/ruvnox/tactical/repository/AuditEventRepository.kt

@@ -0,0 +1,7 @@
+package de.ruvnox.tactical.repository
+
+object AuditEventRepository {
+    fun countTotal(): Long {
+        return queryLong("select count(*) from audit_events")
+    }
+}

src/main/kotlin/de/ruvnox/tactical/repository/DeviceRepository.kt

@@ -0,0 +1,11 @@
+package de.ruvnox.tactical.repository
+
+object DeviceRepository {
+    fun countTotal(): Long {
+        return queryLong("select count(*) from devices")
+    }
+
+    fun countActive(): Long {
+        return queryLong("select count(*) from devices where is_active = true")
+    }
+}

src/main/kotlin/de/ruvnox/tactical/repository/MessageRepository.kt

@@ -0,0 +1,7 @@
+package de.ruvnox.tactical.repository
+
+object MessageRepository {
+    fun countTotal(): Long {
+        return queryLong("select count(*) from messages")
+    }
+}

src/main/kotlin/de/ruvnox/tactical/repository/OperationRoomRepository.kt

@@ -0,0 +1,11 @@
+package de.ruvnox.tactical.repository
+
+object OperationRoomRepository {
+    fun countTotal(): Long {
+        return queryLong("select count(*) from operation_rooms")
+    }
+
+    fun countActive(): Long {
+        return queryLong("select count(*) from operation_rooms where is_active = true")
+    }
+}

src/main/kotlin/de/ruvnox/tactical/repository/RepositorySupport.kt

@@ -0,0 +1,13 @@
+package de.ruvnox.tactical.repository
+
+import de.ruvnox.tactical.Database
+
+internal fun queryLong(sql: String): Long {
+    return Database.connection().use { connection ->
+        connection.createStatement().use { statement ->
+            statement.executeQuery(sql).use { result ->
+                if (result.next()) result.getLong(1) else 0L
+            }
+        }
+    }
+}

src/main/kotlin/de/ruvnox/tactical/repository/UserRepository.kt

@@ -0,0 +1,11 @@
+package de.ruvnox.tactical.repository
+
+object UserRepository {
+    fun countTotal(): Long {
+        return queryLong("select count(*) from app_users")
+    }
+
+    fun countActive(): Long {
+        return queryLong("select count(*) from app_users where is_active = true")
+    }
+}