Add database migrations

Groceries.Data/Migrations/20210627005915_create_items.sql

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+CREATE TABLE IF NOT EXISTS items (
+    item_id uuid NOT NULL DEFAULT gen_random_uuid() PRIMARY KEY,
+    updated_at timestamptz NOT NULL DEFAULT current_timestamp,
+    brand text NOT NULL,
+    name text NOT NULL,
+    UNIQUE (brand, name)
+);

Groceries.Data/Migrations/20210627010245_create_stores.sql

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+CREATE TABLE IF NOT EXISTS retailers (
+    retailer_id uuid NOT NULL DEFAULT gen_random_uuid() PRIMARY KEY,
+    name text NOT NULL UNIQUE
+);
+
+CREATE TABLE IF NOT EXISTS stores (
+    store_id uuid NOT NULL DEFAULT gen_random_uuid() PRIMARY KEY,
+    retailer_id uuid NOT NULL REFERENCES retailers,
+    name text NOT NULL,
+    address text,
+    UNIQUE (retailer_id, name)
+);

Groceries.Data/Migrations/20210627010626_create_transactions.sql

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+CREATE TABLE IF NOT EXISTS transactions (
+    transaction_id uuid NOT NULL DEFAULT gen_random_uuid() PRIMARY KEY,
+    created_at timestamptz NOT NULL DEFAULT current_timestamp,
+    store_id uuid NOT NULL REFERENCES stores
+);
+
+CREATE TABLE IF NOT EXISTS transaction_items (
+    transaction_id uuid NOT NULL REFERENCES transactions ON DELETE CASCADE,
+    item_id uuid NOT NULL REFERENCES items,
+    price numeric(5, 2) NOT NULL CHECK (price >= 0),
+    quantity integer NOT NULL CHECK (quantity > 0),
+    PRIMARY KEY (transaction_id, item_id)
+);

Groceries.Data/Migrations/20210627011117_create_transaction_promotions.sql

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+CREATE TABLE IF NOT EXISTS transaction_promotions (
+    transaction_promotion_id uuid NOT NULL DEFAULT gen_random_uuid() PRIMARY KEY,
+    transaction_id uuid NOT NULL REFERENCES transactions ON DELETE CASCADE,
+    name text NOT NULL,
+    amount numeric(5, 2) NOT NULL CHECK (amount > 0),
+    UNIQUE (transaction_id, name)
+);
+
+CREATE TABLE IF NOT EXISTS transaction_promotion_items (
+    transaction_promotion_id uuid NOT NULL REFERENCES transaction_promotions ON DELETE CASCADE,
+    item_id uuid NOT NULL REFERENCES items,
+    PRIMARY KEY (transaction_promotion_id, item_id)
+);

Groceries.Data/Migrations/20210627011651_create_transaction_totals.sql

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+CREATE OR REPLACE VIEW transaction_totals AS
+SELECT transaction_id, sum(amount) AS total
+FROM (
+    SELECT transaction_id, price * quantity AS amount
+    FROM transaction_items
+    UNION ALL
+    SELECT transaction_id, -amount
+    FROM transaction_promotions
+) AS transaction_amounts
+GROUP BY transaction_id;

Groceries.Data/Migrations/20210627012216_create_item_purchases.sql

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+CREATE OR REPLACE VIEW item_purchases AS
+SELECT item_id, transaction_id, created_at, store_id, price, quantity
+FROM transaction_items
+JOIN transactions USING (transaction_id);

Groceries.Data/Migrations/20210627134014_create_lists.sql

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+CREATE TABLE IF NOT EXISTS lists (
+    list_id uuid NOT NULL DEFAULT gen_random_uuid() PRIMARY KEY,
+    updated_at timestamptz NOT NULL DEFAULT current_timestamp,
+    name text NOT NULL UNIQUE
+);
+
+CREATE TABLE IF NOT EXISTS list_items (
+    list_item_id uuid NOT NULL DEFAULT gen_random_uuid() PRIMARY KEY,
+    list_id uuid NOT NULL REFERENCES lists ON DELETE CASCADE,
+    name text NOT NULL,
+    completed boolean NOT NULL,
+    UNIQUE (list_id, name)
+);

Groceries.Data/Migrations/20211115174755_create_item_barcodes.sql

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+CREATE TABLE IF NOT EXISTS item_barcodes (
+    item_id uuid NOT NULL REFERENCES items ON DELETE CASCADE,
+    barcode_data bigint NOT NULL,
+    format text NOT NULL DEFAULT 'unknown',
+    PRIMARY KEY (item_id, barcode_data)
+);

Groceries.Data/Migrations/20230723215632_create_item_tags.sql

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+ALTER TABLE items
+ADD COLUMN IF NOT EXISTS tags text[] NOT NULL DEFAULT '{}';
+
+CREATE TABLE IF NOT EXISTS item_tags (
+    tag text NOT NULL PRIMARY KEY,
+    unit_name text NOT NULL
+);
+
+INSERT INTO item_tags VALUES ('bacon', 'rashers')
+    ON CONFLICT DO NOTHING;

Groceries.Data/Migrations/20230723220201_create_item_quantity.sql

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+CREATE OR REPLACE FUNCTION item_quantity(name text) RETURNS jsonb
+LANGUAGE SQL
+IMMUTABLE
+RETURNS NULL ON NULL INPUT
+PARALLEL SAFE
+AS $$
+SELECT jsonb_build_object(
+    'amount',
+    CASE matches[2]
+        WHEN 'k' THEN matches[1]::numeric * 1000
+        WHEN 'c' THEN matches[1]::numeric * 100
+        WHEN 'm' THEN matches[1]::numeric / 1000
+        ELSE matches[1]::numeric
+    END,
+    'unit',
+    CASE matches[3]
+        WHEN 'pk' THEN NULL
+        ELSE matches[3]
+    END,
+    'is_metric',
+    CASE
+        WHEN matches[3] = ANY (ARRAY['g', 'l']) THEN true
+        ELSE false
+    END,
+    'is_divisible',
+    CASE
+        WHEN matches[3] = ANY (ARRAY['pk', 'sl']) THEN false
+        ELSE true
+    END
+)
+FROM regexp_matches(name, '(\d*\.?\d+)\s*(c|k|m)?(g|l|pk|pt|sl)', 'i') AS matches;
+$$;

Groceries.Data/Migrations/20230723221913_seed_retailers.sql

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+INSERT INTO retailers VALUES
+    (DEFAULT, 'ALDI'),
+    (DEFAULT, 'ASDA'),
+    (DEFAULT, 'Lidl'),
+    (DEFAULT, 'Morrisons'),
+    (DEFAULT, 'Sainsbury''s'),
+    (DEFAULT, 'Tesco')
+    ON CONFLICT DO NOTHING;