
BEGIN;

INSERT INTO config.upgrade_log (version) VALUES ('0197');

CREATE TABLE config.internal_flag (
    name    TEXT    PRIMARY KEY,
    value   TEXT,
    enabled BOOL    NOT NULL DEFAULT FALSE
);
INSERT INTO config.internal_flag (name) VALUES ('ingest.metarecord_mapping.skip_on_insert');

-- AFTER UPDATE OR INSERT trigger for biblio.record_entry
CREATE OR REPLACE FUNCTION biblio.indexing_ingest_or_delete () RETURNS TRIGGER AS $func$
DECLARE
    ind_data        metabib.field_entry_template%ROWTYPE;
    old_mr          INT;
    tmp_mr          metabib.metarecord%ROWTYPE;
    source_count    INT;
    deleted_mrs     INT[];
    uris            TEXT[];
    uri_xml         TEXT;
    uri_label       TEXT;
    uri_href        TEXT;
    uri_use         TEXT;
    uri_owner       TEXT;
    uri_owner_id    INT;
    uri_id          INT;
    uri_cn_id       INT;
    uri_map_id      INT;
BEGIN

    IF TG_OP = 'UPDATE' THEN -- Clean out the cruft
        DELETE FROM metabib.metarecord_source_map WHERE source = NEW.id; -- Rid ourselves of the search-estimate-killing linkage
    END IF;

    IF NEW.deleted IS TRUE THEN
        RETURN NEW; -- and we're done
    END IF;

    IF TG_OP = 'UPDATE' THEN -- Clean out the cruft
        DELETE FROM metabib.title_field_entry WHERE source = NEW.id;
        DELETE FROM metabib.author_field_entry WHERE source = NEW.id;
        DELETE FROM metabib.subject_field_entry WHERE source = NEW.id;
        DELETE FROM metabib.keyword_field_entry WHERE source = NEW.id;
        DELETE FROM metabib.series_field_entry WHERE source = NEW.id;
        DELETE FROM metabib.full_rec WHERE record = NEW.id;
        DELETE FROM metabib.rec_descriptor WHERE record = NEW.id;

    END IF;

    -- Shove the flattened MARC in
    INSERT INTO metabib.full_rec (record, tag, ind1, ind2, subfield, value)
        SELECT record, tag, ind1, ind2, subfield, value FROM biblio.flatten_marc( NEW.id );

    -- And now the indexing data
    FOR ind_data IN SELECT * FROM biblio.extract_metabib_field_entry( NEW.id ) LOOP
        IF ind_data.field_class = 'title' THEN
            INSERT INTO metabib.title_field_entry (field, source, value)
                VALUES (ind_data.field, ind_data.source, ind_data.value);
        ELSIF ind_data.field_class = 'author' THEN
            INSERT INTO metabib.author_field_entry (field, source, value)
                VALUES (ind_data.field, ind_data.source, ind_data.value);
        ELSIF ind_data.field_class = 'subject' THEN
            INSERT INTO metabib.subject_field_entry (field, source, value)
                VALUES (ind_data.field, ind_data.source, ind_data.value);
        ELSIF ind_data.field_class = 'keyword' THEN
            INSERT INTO metabib.keyword_field_entry (field, source, value)
                VALUES (ind_data.field, ind_data.source, ind_data.value);
        ELSIF ind_data.field_class = 'series' THEN
            INSERT INTO metabib.series_field_entry (field, source, value)
                VALUES (ind_data.field, ind_data.source, ind_data.value);
        END IF;
    END LOOP;

    -- Then, the rec_descriptor
    INSERT INTO metabib.rec_descriptor (record, item_type, item_form, bib_level, control_type, enc_level, audience, lit_form, type_mat, cat_form, pub_status, item_lang, vr_format, date1, date2)
        SELECT  NEW.id,
                biblio.marc21_extract_fixed_field( NEW.id, 'Type' ),
                biblio.marc21_extract_fixed_field( NEW.id, 'Form' ),
                biblio.marc21_extract_fixed_field( NEW.id, 'BLvl' ),
                biblio.marc21_extract_fixed_field( NEW.id, 'Ctrl' ),
                biblio.marc21_extract_fixed_field( NEW.id, 'ELvl' ),
                biblio.marc21_extract_fixed_field( NEW.id, 'Audn' ),
                biblio.marc21_extract_fixed_field( NEW.id, 'LitF' ),
                biblio.marc21_extract_fixed_field( NEW.id, 'TMat' ),
                biblio.marc21_extract_fixed_field( NEW.id, 'Desc' ),
                biblio.marc21_extract_fixed_field( NEW.id, 'DtSt' ),
                biblio.marc21_extract_fixed_field( NEW.id, 'Lang' ),
                (   SELECT  v.value
                      FROM  biblio.marc21_physical_characteristics( NEW.id) p
                            JOIN config.marc21_physical_characteristic_subfield_map s ON (s.id = p.subfield)
                            JOIN config.marc21_physical_characteristic_value_map v ON (v.id = p.value)
                      WHERE p.ptype = 'v' AND s.subfield = 'e'    ),
                biblio.marc21_extract_fixed_field( NEW.id, 'Date1'),
                biblio.marc21_extract_fixed_field( NEW.id, 'Date2');

    -- On to URIs ...
    uris := oils_xpath('//*[@tag="856" and (@ind1="4" or @ind1="1") and (@ind2="0" or @ind2="1")]',NEW.marc);
    IF ARRAY_UPPER(uris,1) > 0 THEN
        FOR i IN 1 .. ARRAY_UPPER(uris, 1) LOOP
            -- First we pull infot out of the 856
            uri_xml     := uris[i];

            uri_href    := (oils_xpath('//*[@code="u"]/text()',uri_xml))[1];
            CONTINUE WHEN uri_href IS NULL;

            uri_label   := (oils_xpath('//*[@code="y"]/text()|//*[@code="3"]/text()|//*[@code="u"]/text()',uri_xml))[1];
            CONTINUE WHEN uri_label IS NULL;

            uri_owner   := (oils_xpath('//*[@code="9"]/text()|//*[@code="w"]/text()|//*[@code="n"]/text()',uri_xml))[1];
            CONTINUE WHEN uri_owner IS NULL;

            uri_use     := (oils_xpath('//*[@code="z"]/text()|//*[@code="2"]/text()|//*[@code="n"]/text()',uri_xml))[1];

            uri_owner := REGEXP_REPLACE(uri_owner, $re$^.*?\((\w+)\).*$$re$, E'\\1');

            SELECT id INTO uri_owner_id FROM actor.org_unit WHERE shortname = uri_owner;
            CONTINUE WHEN NOT FOUND;

            -- now we look for a matching uri
            SELECT id INTO uri_id FROM asset.uri WHERE label = uri_label AND href = uri_href AND use_restriction = uri_use AND active;
            IF NOT FOUND THEN -- create one
                INSERT INTO asset.uri (label, href, use_restriction) VALUES (uri_label, uri_href, uri_use);
                SELECT id INTO uri_id FROM asset.uri WHERE label = uri_label AND href = uri_href AND use_restriction = uri_use AND active;
            END IF;

            -- we need a call number to link through
            SELECT id INTO uri_cn_id FROM asset.call_number WHERE owning_lib = uri_owner_id AND record = NEW.id AND label = '##URI##' AND NOT deleted;
            IF NOT FOUND THEN
                INSERT INTO asset.call_number (owning_lib, record, create_date, edit_date, creator, editor, label)
                    VALUES (uri_owner_id, NEW.id, 'now', 'now', NEW.editor, NEW.editor, '##URI##');
                SELECT id INTO uri_cn_id FROM asset.call_number WHERE owning_lib = uri_owner_id AND record = NEW.id AND label = '##URI##' AND NOT deleted;
            END IF;

            -- now, link them if they're not already
            SELECT id INTO uri_map_id FROM asset.uri_call_number_map WHERE call_number = uri_cn_id AND uri = uri_id;
            IF NOT FOUND THEN
                INSERT INTO asset.uri_call_number_map (call_number, uri) VALUES (uri_cn_id, uri_id);
            END IF;

        END LOOP;
    END IF;

    -- And, finally, metarecord mapping!

    PERFORM * FROM config.internal_flag WHERE name = 'ingest.metarecord_mapping.skip_on_insert' AND enabled;

    IF NOT FOUND OR TG_OP = 'UPDATE' THEN
        FOR tmp_mr IN SELECT  m.* FROM  metabib.metarecord m JOIN metabib.metarecord_source_map s ON (s.metarecord = m.id) WHERE s.source = NEW.id LOOP

            IF old_mr IS NULL AND NEW.fingerprint = tmp_mr.fingerprint THEN -- Find the first fingerprint-matching
                old_mr := tmp_mr.id;
            ELSE
                SELECT COUNT(*) INTO source_count FROM metabib.metarecord_source_map WHERE metarecord = tmp_mr.id;
                IF source_count = 0 THEN -- No other records
                    deleted_mrs := ARRAY_APPEND(deleted_mrs, tmp_mr.id);
                    DELETE FROM metabib.metarecord WHERE id = tmp_mr.id;
                END IF;
            END IF;

        END LOOP;

        IF old_mr IS NULL THEN -- we found no suitable, preexisting MR based on old source maps
            SELECT id INTO old_mr FROM metabib.metarecord WHERE fingerprint = NEW.fingerprint; -- is there one for our current fingerprint?
            IF old_mr IS NULL THEN -- nope, create one and grab its id
                INSERT INTO metabib.metarecord ( fingerprint, master_record ) VALUES ( NEW.fingerprint, NEW.id );
                SELECT id INTO old_mr FROM metabib.metarecord WHERE fingerprint = NEW.fingerprint;
            ELSE -- indeed there is. update it with a null cache and recalcualated master record
                UPDATE  metabib.metarecord
                  SET   mods = NULL,
                        master_record = ( SELECT id FROM biblio.record_entry WHERE fingerprint = NEW.fingerprint ORDER BY quality DESC LIMIT 1)
                  WHERE id = old_mr;
            END IF;
        ELSE -- there was one we already attached to, update its mods cache and master_record
            UPDATE  metabib.metarecord
              SET   mods = NULL,
                    master_record = ( SELECT id FROM biblio.record_entry WHERE fingerprint = NEW.fingerprint ORDER BY quality DESC LIMIT 1)
              WHERE id = old_mr;
        END IF;

        INSERT INTO metabib.metarecord_source_map (metarecord, source) VALUES (old_mr, NEW.id); -- new source mapping

        UPDATE action.hold_request SET target = old_mr WHERE target IN ( SELECT explode_array(deleted_mrs) ) AND hold_type = 'M'; -- if we had to delete any MRs above, make sure their holds are moved
    END IF;

    RETURN NEW;

END;
$func$ LANGUAGE PLPGSQL;

COMMIT;

