Empire technology views
* Added new research-related constants * Added set of views and functions to list empires' technologies. This includes a view which determines the visibility of an in-progress research's details, and a main list view.
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legacyworlds-server-data/db-structure/parts/040-functions
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@ -154,6 +154,46 @@ GRANT EXECUTE
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TO :dbuser;
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/*
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* Compute a technology identifier
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* --------------------------------
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*
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* This function returns the identifier of a technology as seen from the
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* player's side. The identifier is either the string identifier for the
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* technology's name, or a MD5 hash including both the empire's identifier
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* and the string identifier for "unknown" technologies.
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*
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* Parameters:
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* _empire The empire's identifier
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* _technology The technology's string identifier
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* _visible TRUE if the technology is supposed to be visible, FALSE
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* otherwise
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*
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* Returns:
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* ? The technology's client-side identifier
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*/
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DROP FUNCTION IF EXISTS emp.technology_make_identifier( INT , TEXT , BOOLEAN );
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CREATE FUNCTION emp.technology_make_identifier(
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_empire INT , _technology TEXT , _visible BOOLEAN )
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RETURNS TEXT
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LANGUAGE SQL
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STRICT IMMUTABLE
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SECURITY DEFINER
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AS $technology_make_identifier$
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SELECT ( CASE
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WHEN $3 THEN
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$2
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ELSE
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md5( $1::TEXT || ' (making hash less obvious) ' || $2 )
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END );
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$technology_make_identifier$;
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REVOKE EXECUTE
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ON FUNCTION emp.technology_make_identifier( INT , TEXT , BOOLEAN )
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FROM PUBLIC;
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--
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-- Returns a planet owner's empire size
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@ -878,3 +918,127 @@ CREATE VIEW emp.resources_view
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GRANT SELECT
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ON emp.resources_view
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TO :dbuser;
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/*
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* Technology visibility view
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* ---------------------------
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*
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* This view can be used to determine whether entries from empires' research
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* and technologies table are fully visible or only displayed as "unknown
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* technologies".
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*
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* Columns:
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* empire_id The empire's identifier
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* technology_name_id The technology's identifier
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* emptech_visible TRUE if the technology's details are visible,
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* FALSE if they should be hidden
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*/
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DROP VIEW IF EXISTS emp.technology_visibility_view CASCADE;
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CREATE VIEW emp.technology_visibility_view
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AS SELECT empire_id , technology_name_id ,
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( emptech_state <> 'RESEARCH'
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OR emptech_points >= sys.get_constant( 'game.research.visibility.points' )
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OR emptech_points / technology_points::DOUBLE PRECISION >= sys.get_constant( 'game.research.visibility.ratio' )
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) AS emptech_visible
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FROM emp.technologies_v2
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INNER JOIN defs.technologies
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USING ( technology_name_id );
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/*
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* Empire research and technologies
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* ---------------------------------
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*
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* This view lists empires' research and technologies, along with their
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* current state.
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*
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* Columns:
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* empire_id The empire's identifier
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* emptech_id An identifier for the technology, which is either
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* the string identifier of the technology's name
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* or a MD5 hash if the technology is not
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* supposed to be visible
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* emptech_state The state of the technology, straight from the
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* empire technology table
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* emptech_visible Whether the technology is supposed to be visible
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* or not
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* technology_category The string identifier of the technology's category
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* technology_name The string identifier of the technology's name,
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* or NULL if the technology is not supposed to
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* be visible
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* technology_description The string identifier of the technology's name,
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* or NULL if the technology is not supposed
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* to be visible
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* emptech_points The amount of points accumulated while researching
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* the technology, or NULL if the technology is
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* not supposed to be visible
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* emptech_priority The current research priority, or NULL if the
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* technology is no longer being researched
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* emptech_ratio The percentage of points accumulated while
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* researching the technology, or NULL if the
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* technology is no longer being researched
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* technology_price The monetary price of the technology, or NULL if
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* the technology is not supposed to be visible
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* technology_dependencies The technology's dependencies from the
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* dependencies view
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*/
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DROP VIEW IF EXISTS emp.technologies_v2_view CASCADE;
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CREATE VIEW emp.technologies_v2_view
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AS SELECT empire_id ,
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emp.technology_make_identifier( empire_id , _name_str.name , emptech_visible ) AS emptech_id ,
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emptech_state ,
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emptech_visible ,
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_cat_str.name AS technology_category ,
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( CASE
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WHEN emptech_visible THEN
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_name_str.name
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ELSE
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NULL::TEXT
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END ) AS technology_name ,
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( CASE
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WHEN emptech_visible THEN
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_descr_str.name
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ELSE
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NULL::TEXT
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END ) AS technology_description ,
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( CASE
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WHEN emptech_state <> 'RESEARCH' then
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technology_points
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WHEN emptech_visible THEN
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FLOOR( emptech_points )::BIGINT
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ELSE
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NULL::BIGINT
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END ) AS emptech_points ,
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emptech_priority ,
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( CASE
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WHEN emptech_state = 'RESEARCH' THEN
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FLOOR( 100.0 * emptech_points / technology_points::DOUBLE PRECISION )::INT
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ELSE
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NULL::INT
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END ) AS emptech_ratio ,
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( CASE
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WHEN emptech_visible THEN
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technology_price
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ELSE
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NULL::INT
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END ) AS technology_price ,
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technology_dependencies
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FROM emp.technologies_v2
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INNER JOIN emp.technology_visibility_view
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USING ( technology_name_id , empire_id )
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INNER JOIN defs.technologies _tech
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USING ( technology_name_id )
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INNER JOIN defs.technology_dependencies_view
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USING ( technology_name_id )
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INNER JOIN defs.strings _name_str
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ON _name_str.id = _tech.technology_name_id
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INNER JOIN defs.strings _cat_str
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ON _cat_str.id = _tech.technology_category_id
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INNER JOIN defs.strings _descr_str
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ON _descr_str.id = _tech.technology_description_id;
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GRANT SELECT
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ON emp.technologies_v2_view
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TO :dbuser;
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