feat(connector): add count projects function

connector/shared/src/commonMain/kotlin/io/anthonyberg/connector/shared/ProjectTransaction.kt

@@ -10,6 +10,13 @@ import io.anthonyberg.connector.shared.entity.Project
 class ProjectTransaction (driverFactory: DriverFactory) {
     private val database = ProjectDatabase(driverFactory)
 
+    /**
+     * Creates a project in the database.
+     */
+    fun createProject(project: Project) {
+        database.createProject(project)
+    }
+
     /**
      * Gets all Projects in the database.
      */
@@ -19,9 +26,17 @@ class ProjectTransaction (driverFactory: DriverFactory) {
     }
 
     /**
-     * Creates a project in the database.
+     * Gets the number of projects in the database
      */
-    fun createProject(project: Project) {
+    fun countProjects(): Long {
-        database.createProject(project)
+        return database.countProjects()
+    }
+
+    /**
+     * Checks if projects are on the database.
+     * @return `true` if projects exist
+     */
+    fun projectExists(): Boolean {
+        return database.countProjects() > 0
     }
 }

connector/shared/src/commonMain/kotlin/io/anthonyberg/connector/shared/database/ProjectDatabase.kt

@@ -39,4 +39,11 @@ internal class ProjectDatabase (driverFactory: DriverFactory) {
             createdUTC = project.createdUTC,
         )
     }
+
+    /**
+     * Counts the amount of entries there are for projects
+     */
+    internal fun countProjects(): Long {
+        return dbQuery.countProjects().executeAsOne()
+    }
 }

connector/shared/src/commonMain/sqldelight/io/anthonyberg/connector/shared/database/Project.sq

@@ -12,3 +12,6 @@ VALUES (?, ?, ?);
 
 selectAllProjects:
 SELECT * FROM Project;
+
+countProjects:
+SELECT COUNT(*) FROM Project;