Added first draft database schema

migrations/2021-06-27-131430_initial_schema/down.sql

@@ -0,0 +1,4 @@
+-- This file should undo anything in `up.sql`
+DROP TABLE packages;
+DROP TABLE maintainers;
+DROP TYPE package_type;

migrations/2021-06-27-131430_initial_schema/up.sql

@@ -0,0 +1,34 @@
+CREATE TABLE maintainers (
+    id uuid DEFAULT gen_random_uuid() PRIMARY KEY,
+
+    name text NOT NULL,
+    email text NOT NULL,
+
+    UNIQUE (name, email)
+);
+
+CREATE TYPE package_type AS ENUM ('deb',  'dsc', 'udeb');
+
+-- Table containing information about a package
+CREATE TABLE packages (
+    id uuid DEFAULT gen_random_uuid() PRIMARY KEY,
+
+    name text NOT NULL,
+    type package_type NOT NULL,
+    version text NOT NULL,
+    -- This is just text, as there's no guarantee the source is present on this
+    -- repository.
+    source text,
+    section text,
+    priority text,
+    -- NOTE: could this be better than just text?
+    architecture text NOT NULL,
+    essential boolean DEFAULT false,
+    installed_size integer,
+    maintainer_id uuid REFERENCES maintainers (id) NOT NULL,
+    description text NOT NULL,
+    homepage text,
+
+    -- NOTE: I don't think this is enough because architecture can be a wildcard
+    UNIQUE (name, version, architecture)
+);