-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION pg_mockable" to load this file. \quit

--------------------------------------------------------------------------------------------------------------

do $$
declare
    _extension_name name := 'pg_mockable';
    _setting_name text := _extension_name || '.readme_url';
    _ddl_cmd_to_set_pg_readme_url text := format(
        'ALTER DATABASE %I SET %s = %L'
        ,current_database()
        ,_setting_name
        ,'https://github.com/bigsmoke/' || _extension_name || '/blob/master/README.md'
    );
begin
    if (select rolsuper from pg_roles where rolname = current_user) then
        execute _ddl_cmd_to_set_pg_readme_url;
    else
        -- We say `superuser = false` in the control file; so let's just whine a little instead of crashing.
        raise warning using
            message = format(
                'Because you''re installing the `%I` extension as non-superuser and because you'
                || ' are also not the owner of the `%I` DB, the database-level `%I` setting has'
                || ' not been set.'
                ,_extension_name
                ,current_database()
                ,_setting_name
            )
            ,detail = 'Settings of the form `<extension_name>.readme_url` are used by `pg_readme` to'
                || ' cross-link between extensions their README files.'
            ,hint = 'If you want full inter-extension README cross-linking, you can ask your friendly'
                || E' neighbourhood DBA to execute the following statement:\n'
                || _ddl_cmd_to_set_pg_readme_url || ';';
    end if;
end;
$$;

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create or replace function pg_mockable_meta_pgxn()
    returns jsonb
    stable
    language sql
    return jsonb_build_object(
        'name'
        ,'pg_mockable'
        ,'abstract'
        ,'Create mockable versions of functions from other schemas.'
        ,'description'
        ,'The `pg_mockable` extension can be used to create mockable versions of functions from other'
            ' schemas.'
        ,'version'
        ,(
            select
                pg_extension.extversion
            from
                pg_catalog.pg_extension
            where
                pg_extension.extname = 'pg_mockable'
        )
        ,'maintainer'
        ,array[
            'Rowan Rodrik van der Molen <rowan@bigsmoke.us>'
        ]
        ,'license'
        ,'gpl_3'
        ,'prereqs'
        ,'{
            "runtime": {
                "requires": {
                    "hstore": 0
                }
            },
            "test": {
                "requires": {
                    "pgtap": 0
                }
            }
        }'::jsonb
        ,'provides'
        ,('{
            "pg_readme": {
                "file": "pg_mockable--0.1.0.sql",
                "version": "' || (
                    select
                        pg_extension.extversion
                    from
                        pg_catalog.pg_extension
                    where
                        pg_extension.extname = 'pg_mockable'
                ) || '",
                "docfile": "README.md"
            }
        }')::jsonb
        ,'resources'
        ,'{
            "homepage": "https://blog.bigsmoke.us/tag/pg_mockable",
            "bugtracker": {
                "web": "https://github.com/bigsmoke/pg_mockable/issues"
            },
            "repository": {
                "url": "https://github.com/bigsmoke/pg_mockable.git",
                "web": "https://github.com/bigsmoke/pg_mockable",
                "type": "git"
            }
        }'::jsonb
        ,'meta-spec'
        ,'{
            "version": "1.0.0",
            "url": "https://pgxn.org/spec/"
        }'::jsonb
        ,'generated_by'
        ,'`select pg_mockable_meta_pgxn()`'
        ,'tags'
        ,array[
            'documentation',
            'markdown',
            'meta',
            'plpgsql',
            'function',
            'functions'
        ]
    );

comment
    on function pg_mockable_meta_pgxn()
    is $markdown$
Returns the JSON meta data that has to go into the `META.json` file needed for
[PGXN—PostgreSQL Extension Network](https://pgxn.org/) packages.

The `Makefile` includes a recipe to allow the developer to: `make META.json` to
refresh the meta file with the function's current output, including the
`default_version`.

`pg_rowalesce` can indeed be found on PGXN: https://pgxn.org/dist/pg_mockable/
$markdown$;

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