Empire research initialisation

* When an empire is created, all technologies that have no dependencies
will be added as ongoing research with default priority and no points in
the empire research table.

legacyworlds-server-data/db-structure/parts/040-functions/040-empire.sql

@@ -45,6 +45,14 @@ BEGIN
 	INSERT INTO emp.resources ( empire_id , resource_name_id )
 		SELECT _name_id , resource_name_id FROM defs.resources;
 
+	-- Insert technologies that have no dependencies as research in progress
+	INSERT INTO emp.technologies_v2 ( empire_id , technology_name_id )
+		SELECT _name_id , technology_name_id
+			FROM defs.technologies
+				LEFT OUTER JOIN defs.technology_dependencies
+					USING ( technology_name_id )
+			WHERE techdep_id IS NULL;
+
 	-- Update resource mining quantities
 	UPDATE verse.planet_resources
 		SET pres_income = emp.mining_compute_extraction( _update_row )

legacyworlds-server-data/db-structure/tests/admin/040-functions/040-empire/010-create-empire.sql

@@ -27,6 +27,28 @@ BEGIN;
 			100 , 0.2 , 0.5
 		);
 
+	/*
+	 * We also need 3 technologies (tech1, tech2 and tech3), and a chain of
+	 * dependencies between them (i.e. tech3 -> tech2 -> tech1). Disabling
+	 * unused fields in defs.technologies makes things easier.
+	 */
+	ALTER TABLE defs.technologies
+		ALTER technology_category_id DROP NOT NULL ,
+		ALTER technology_discovery_id DROP NOT NULL ,
+		ALTER technology_description_id DROP NOT NULL ,
+		ALTER technology_price DROP NOT NULL ,
+		ALTER technology_points DROP NOT NULL;
+	SELECT _create_test_strings( 3 , 'tech' );
+	INSERT INTO defs.technologies ( technology_name_id )
+		VALUES ( _get_string( 'tech1' ) ) ,
+				( _get_string( 'tech2' ) ) ,
+				( _get_string( 'tech3' ) );
+	INSERT INTO defs.technology_dependencies(
+			technology_name_id , technology_name_id_depends
+		) VALUES ( _get_string( 'tech2' ) , _get_string( 'tech1' ) ) ,
+			 ( _get_string( 'tech3' ) , _get_string( 'tech2' ) );
+
+
 	/* We replace the emp.mining_get_input() and emp.mining_compute_extraction()
 	 * functions with something we control fully.
 	 */
@@ -49,7 +71,7 @@ BEGIN;
 	$$;
 
 	/***** TESTS BEGIN HERE *****/
-	SELECT plan( 8 );
+	SELECT plan( 9 );
 	
 	SELECT emp.create_empire( _get_emp_name( 'testEmp1' ) ,
 				_get_map_name( 'testPlanet1' ) ,
@@ -92,6 +114,15 @@ BEGIN;
 		FROM emp.resources
 		WHERE empire_id = _get_emp_name( 'testEmp1' );
 
+	SELECT diag_test_name( 'emp.create_empire() - Empire technologies have been initialised' );
+	SELECT set_eq( $$
+		SELECT technology_name_id , emptech_state::TEXT , emptech_points , emptech_priority
+			FROM emp.technologies_v2
+			WHERE empire_id = _get_emp_name( 'testEmp1' );
+	$$ , $$ VALUES(
+		_get_string( 'tech1' ) , 'RESEARCH' , 0.0 , 2
+	) $$ );
+
 	SELECT diag_test_name( 'emp.create_empire() - Resource mining has been updated' );
 	SELECT is( pres_income::DOUBLE PRECISION , 42::DOUBLE PRECISION )
 		FROM verse.planet_resources