import-legacy-ids-of-booking-items-and-hosting-assets (#101)

Co-authored-by: Michael Hoennig <michael@hoennig.de>
Reviewed-on: https://dev.hostsharing.net/hostsharing/hs.hsadmin.ng/pulls/101
Reviewed-by: Marc Sandlus <marc.sandlus@hostsharing.net>

src/main/resources/db/changelog/7-hs-hosting/701-hosting-asset/7016-hs-hosting-asset-migration.sql

@@ -0,0 +1,96 @@
+--liquibase formatted sql
+
+-- TODO: These changesets are just for the external remote views to simulate the legacy tables.
+--  Once we don't need the external remote views anymore, create revert changesets.
+
+-- ============================================================================
+--changeset hs-hosting-asset-MIGRATION-mapping:1 endDelimiter:--//
+-- ----------------------------------------------------------------------------
+
+CREATE TABLE hs_hosting_asset_legacy_id
+(
+    uuid            uuid NOT NULL REFERENCES hs_hosting_asset(uuid),
+    legacy_id       integer NOT NULL
+);
+--//
+
+
+-- ============================================================================
+--changeset hs-hosting-asset-MIGRATION-sequence:1 endDelimiter:--//
+-- ----------------------------------------------------------------------------
+
+CREATE SEQUENCE IF NOT EXISTS hs_hosting_asset_legacy_id_seq
+    AS integer
+    START 1000000000
+    OWNED BY hs_hosting_asset_legacy_id.legacy_id;
+--//
+
+
+-- ============================================================================
+--changeset hs-hosting-asset-MIGRATION-default:1 endDelimiter:--//
+-- ----------------------------------------------------------------------------
+
+ALTER TABLE hs_hosting_asset_legacy_id
+    ALTER COLUMN legacy_id
+        SET DEFAULT nextVal('hs_hosting_asset_legacy_id_seq');
+--/
+
+
+-- ============================================================================
+--changeset hs-hosting-asset-MIGRATION-insert:1 endDelimiter:--//
+-- ----------------------------------------------------------------------------
+
+CALL defineContext('schema-migration');
+INSERT INTO hs_hosting_asset_legacy_id(uuid, legacy_id)
+    SELECT uuid, nextVal('hs_hosting_asset_legacy_id_seq') FROM hs_hosting_asset;
+--/
+
+
+-- ============================================================================
+--changeset hs-hosting-asset-MIGRATION-insert-trigger:1 endDelimiter:--//
+-- ----------------------------------------------------------------------------
+create or replace function insertassetLegacyIdMapping()
+    returns trigger
+    language plpgsql
+    strict as $$
+begin
+    if TG_OP <> 'INSERT' then
+        raise exception 'invalid usage of trigger';
+    end if;
+
+    INSERT INTO hs_hosting_asset_legacy_id VALUES
+        (NEW.uuid, nextVal('hs_hosting_asset_legacy_id_seq'));
+
+    return NEW;
+end; $$;
+
+create trigger createassetLegacyIdMapping
+    after insert on hs_hosting_asset
+        for each row
+            execute procedure insertassetLegacyIdMapping();
+--/
+
+
+-- ============================================================================
+--changeset hs-hosting-asset-MIGRATION-delete-trigger:1 endDelimiter:--//
+-- ----------------------------------------------------------------------------
+create or replace function deleteassetLegacyIdMapping_tf()
+    returns trigger
+    language plpgsql
+    strict as $$
+begin
+    if TG_OP <> 'DELETE' then
+        raise exception 'invalid usage of trigger';
+    end if;
+
+    DELETE FROM hs_hosting_asset_legacy_id
+           WHERE uuid = OLD.uuid;
+
+    return OLD;
+end; $$;
+
+create trigger deleteassetLegacyIdMapping_tg
+    before delete on hs_hosting_asset
+        for each row
+            execute procedure deleteassetLegacyIdMapping_tf();
+--/

src/main/resources/db/changelog/db.changelog-master.yaml

@@ -142,15 +142,17 @@ databaseChangeLog:
     - include:
         file: db/changelog/6-hs-booking/620-booking-project/6208-hs-booking-project-test-data.sql
     - include:
-        file: db/changelog/6-hs-booking/630-booking-item/6200-hs-booking-item.sql
+        file: db/changelog/6-hs-booking/630-booking-item/6300-hs-booking-item.sql
     - include:
         file: db/changelog/6-hs-booking/630-booking-item/6203-hs-booking-item-rbac.sql
     - include:
-        file: db/changelog/6-hs-booking/630-booking-item/6208-hs-booking-item-test-data.sql
+        file: db/changelog/6-hs-booking/630-booking-item/6308-hs-booking-item-test-data.sql
     - include:
         file: db/changelog/7-hs-hosting/701-hosting-asset/7010-hs-hosting-asset.sql
     - include:
         file: db/changelog/7-hs-hosting/701-hosting-asset/7013-hs-hosting-asset-rbac.sql
+    - include:
+        file: db/changelog/7-hs-hosting/701-hosting-asset/7016-hs-hosting-asset-migration.sql
     - include:
         file: db/changelog/7-hs-hosting/701-hosting-asset/7018-hs-hosting-asset-test-data.sql
     - include: