group.sql

-- Write the name of the group in the title of the page
SELECT 'title' as component, name as contents FROM expense_group WHERE id = $id;


-- Handle the form to add a member to the group (we do it at the top of the page to see it right away)
INSERT INTO group_member(group_id, name)
SELECT $id, :new_member_name WHERE :new_member_name IS NOT NULL;

-- List of members of the group
SELECT 'list' as component, 'Members' as title;
SELECT name AS title FROM group_member WHERE group_id = $id;

-- Form to add a new member to the group
SELECT 'form' as component, 'Add a member to the group' as validate;
SELECT 'Member Name' AS 'label', 'new_member_name' AS name;

SELECT 'title' as component, 'Expenses' as contents

-- Form to add an expense
SELECT 'form' as component, 'Add an expense' as title, 'Add' as validate;
SELECT 'Description' AS name;
SELECT 'Amount' AS name, 'number' AS type;
SELECT 'Spent By' AS name, 'select' as type,
 json_group_array(json_object('label', name, 'value', id)) as options
FROM group_member WHERE group_id = $id;

-- Insert the expense posted by the form into the database
INSERT INTO expense(spent_by, name, amount)
SELECT :"Spent By", :Description, :Amount WHERE :Amount IS NOT NULL;

-- List of expenses of the group
SELECT 'card' as component, 'Expenses' as title;
SELECT expense.name as title,
 'By ' || group_member.name || ', on ' || expense.date as description,
 expense.amount || ' €' as footer,
 CASE
 WHEN expense.amount > 100 THEN 'red'
 WHEN expense.amount > 50 THEN 'orange'
 ELSE 'blue'
 END AS color
FROM expense
 INNER JOIN group_member on expense.spent_by = group_member.id
WHERE group_member.group_id = $id;

-- Show the positive and negative debts of each member
SELECT 'chart' AS component, 'Debts by Person' AS title, 'bar' AS type, TRUE AS horizontal;
SELECT member_name AS label, is_owed AS value FROM individual_debts
WHERE group_id = $id ORDER BY is_owed DESC;