feat: add postgres repository for training

migrations/001_trainings.up.sql

@@ -0,0 +1,56 @@
+BEGIN;
+
+CREATE SCHEMA IF NOT EXISTS training;
+
+CREATE TABLE IF NOT EXISTS training.trainings (
+  id          UUID PRIMARY KEY,
+  name        varchar(255) NOT NULL,
+  description text NOT NULL,
+  days        smallint NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS training.prices (
+  training_id UUID REFERENCES training.trainings(id),
+  amount NUMERIC(10,4) NOT NULL,
+  currency VARCHAR(3) NOT NULL,
+  CONSTRAINT positive_amount CHECK (amount >= 0),
+  CONSTRAINT allowed_currencies CHECK (currency IN ('USD', 'EUR', 'CZK')),
+  type        VARCHAR(10) NOT NULL,
+  CHECK       (type IN ('OPEN', 'CORPORATE')),
+  PRIMARY KEY (training_id, currency, type) -- composite primary key
+);
+
+CREATE TABLE IF NOT EXISTS training.dates (
+  ID UUID PRIMARY KEY,
+  training_id UUID REFERENCES training.trainings(id),
+  date DATE NOT NULL,
+  start_time TIME NOT NULL,
+  days SMALLINT NOT NULL,
+  is_online BOOLEAN NOT NULL,
+  location VARCHAR(255) NOT NULL,
+  address VARCHAR(500) NOT NULL,
+  capacity SMALLINT NOT NULL,
+  price_amount NUMERIC(10,4) NOT NULL,
+  price_currency VARCHAR(3) NOT NULL,
+  CONSTRAINT positive_amount CHECK (price_amount >= 0),
+  CONSTRAINT allowed_currencies CHECK (price_currency IN ('USD', 'EUR', 'CZK'))
+);
+
+CREATE TABLE IF NOT EXISTS training.date_attendees (
+  id UUID PRIMARY KEY,
+  date_id UUID REFERENCES training.dates(id),
+  name VARCHAR(255) NOT NULL,
+  email VARCHAR(255) NOT NULL,
+  phone VARCHAR(20) NOT NULL,
+  company VARCHAR(255) NOT NULL,
+  position VARCHAR(255) NOT NULL,
+  is_student BOOLEAN NOT NULL,
+  has_paid BOOLEAN NOT NULL,
+  has_attended BOOLEAN NOT NULL,
+  bill_amount NUMERIC(10,4) NOT NULL,
+  bill_currency VARCHAR(3) NOT NULL,
+  CONSTRAINT positive_amount CHECK (bill_amount >= 0),
+  CONSTRAINT allowed_currencies CHECK (bill_currency IN ('USD', 'EUR', 'CZK'))
+);
+
+COMMIT;