From e3daf160359c3a21e4cf9dc1fd53aac41aba6c04 Mon Sep 17 00:00:00 2001
From: Fabrice Lecomte <fabrice.lecomte.be@gmail.com>
Date: Thu, 25 Jul 2019 18:03:04 +0200
Subject: [PATCH] feature #3: create table article

---
 resources/sql/migrations/0000-init.down.sql |  4 +++
 resources/sql/migrations/0000-init.up.sql   | 33 +++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 resources/sql/migrations/0000-init.down.sql
 create mode 100644 resources/sql/migrations/0000-init.up.sql

diff --git a/resources/sql/migrations/0000-init.down.sql b/resources/sql/migrations/0000-init.down.sql
new file mode 100644
index 0000000..683caae
--- /dev/null
+++ b/resources/sql/migrations/0000-init.down.sql
@@ -0,0 +1,4 @@
+drop trigger generate_version_number_trigger on article;
+drop table article;
+drop function generate_version_number(regclass, uuid);
+drop function set_version_number();
\ No newline at end of file
diff --git a/resources/sql/migrations/0000-init.up.sql b/resources/sql/migrations/0000-init.up.sql
new file mode 100644
index 0000000..6607a36
--- /dev/null
+++ b/resources/sql/migrations/0000-init.up.sql
@@ -0,0 +1,33 @@
+create or replace function generate_version_number(tablename regclass, version_id uuid) returns int
+    language plpgsql as
+$$
+begin
+    return random(); -- TODO
+end;
+$$;
+
+create or replace function set_version_number() returns trigger
+    language plpgsql as
+$$
+begin
+    new.version_number = generate_version_number(TG_TABLE_NAME::regclass, new.version_id);
+end;
+$$;
+
+create table article
+(
+    id             uuid          default uuid_generate_v4() not null,
+    version_id     uuid          default uuid_generate_v4() not null,
+    version_number int                                      not null,
+    title          text                                     not null,
+    annonymous     boolean       default false              not null,
+    content        text                                     not null,
+    description    text,
+    tags           varchar(32)[] default '{}'               not null,
+    created_at     timestamptz   default now()              not null
+);
+
+CREATE TRIGGER generate_version_number_trigger
+    BEFORE INSERT
+    ON article
+EXECUTE PROCEDURE set_version_number();