clean up database scripts, start readmes.

4 files changed, 82 insertions, 0 deletions

diff --git a/db/sql/seed.sql b/db/sql/seed.sql
new file mode 100644
index 0000000..41d6e46
--- /dev/null
+++ b/db/sql/seed.sql
@@ -0,0 +1,5 @@
+-- create default sizes for sizes lookup table.
+INSERT OR IGNORE INTO Sizes (id, size) VALUES (1, 8), (2, 16), (3, 24), (4, 32), (5, 40), (6, 48); 
+
+-- create default preferences.
+INSERT OR IGNORE INTO Preferences (user_id) VALUES (1), (2);
diff --git a/db/sql/tables.sql b/db/sql/tables.sql
new file mode 100644
index 0000000..0fbfef8
--- /dev/null
+++ b/db/sql/tables.sql
@@ -0,0 +1,39 @@
+-- user table for users.
+CREATE TABLE IF NOT EXISTS Users (
+    id INTEGER PRIMARY KEY,
+    password TEXT UNIQUE NOT NULL,
+    uuid TEXT UNIQUE NOT NULL,
+    name TEXT UNIQUE NOT NULL
+);
+
+-- statistics table for users to log their consumption
+CREATE TABLE IF NOT EXISTS Statistics (
+    id INTEGER PRIMARY KEY,
+    date DATETIME NOT NULL,
+    user_id INT NOT NULL,
+    quantity INT
+);
+
+-- preferences table for a user.
+CREATE TABLE IF NOT EXISTS Preferences (
+    id INTEGER PRIMARY KEY,
+    color TEXT NOT NULL DEFAULT "#000000",
+    user_id INT UNIQUE NOT NULL,
+    size_id INT NOT NULL DEFAULT 1,
+    FOREIGN KEY(user_id) REFERENCES Users(id) ON DELETE CASCADE,
+    FOREIGN KEY(size_id) REFERENCES Sizes(id)
+);
+
+-- lookup table for sizes.
+CREATE TABLE IF NOT EXISTS Sizes (
+    id INTEGER PRIMARY KEY,
+    size INT NOT NULL,
+    unit TEXT DEFAULT "oz"
+);
+
+CREATE TABLE IF NOT EXISTS APIToken (
+    id INTEGER PRIMARY KEY,
+    token TEXT NOT NULL,
+    user_id INTEGER NOT NULL,
+    FOREIGN KEY(user_id) REFERENCES Users(id) ON DELETE CASCADE
+);
\ No newline at end of file
diff --git a/db/sql/triggers.sql b/db/sql/triggers.sql
new file mode 100644
index 0000000..3827642
--- /dev/null
+++ b/db/sql/triggers.sql
@@ -0,0 +1,11 @@
+CREATE TRIGGER IF NOT EXISTS enforce_size_id
+BEFORE INSERT ON Preferences
+BEGIN
+    SELECT
+        CASE
+            WHEN (
+                SELECT COUNT(*) FROM Sizes WHERE id = new.size_id
+            ) = 0
+            THEN RAISE(ABORT, 'Size does not exist')
+        END;
+END;
diff --git a/db/sql/views.sql b/db/sql/views.sql
new file mode 100644
index 0000000..c56286d
--- /dev/null
+++ b/db/sql/views.sql
@@ -0,0 +1,27 @@
+CREATE VIEW IF NOT EXISTS aggregated_stats AS
+    SELECT u.uuid, SUM(s.quantity * s.size) from Statistics s INNER JOIN Users u ON u.id = s.user_id INNER JOIN Preferences p ON p.user_id = u.id INNER JOIN Size s ON s.id = p.size_id;
+
+CREATE VIEW IF NOT EXISTS `DailyUserStatistics` AS
+SELECT users.name, IFNULL(SUM(statistics.quantity), 0) as total, preferences.color as color
+FROM users
+LEFT JOIN statistics ON users.id = statistics.user_id AND DATE(statistics.date) = DATE('now', '-1 day')
+LEFT JOIN preferences ON users.id = preferences.user_id
+GROUP BY users.name;
+
+
+CREATE VIEW IF NOT EXISTS `WeeklyStatisticsView` AS
+  WITH DateSequence(Dates) AS
+    (
+     SELECT Date(CURRENT_DATE, '-7 day')
+     UNION ALL
+     SELECT Date(Dates, '+1 day')
+     FROM DateSequence
+     WHERE Date(Dates, '+1 day') < Date(CURRENT_DATE)
+    )
+SELECT DateSequence.Dates as 'date',
+  IFNULL(SUM(statistics.quantity), 0) AS 'total'
+FROM DateSequence
+LEFT JOIN statistics
+ON Date(statistics.date) = DateSequence.Dates
+GROUP BY DateSequence.Dates
+ORDER BY DateSequence.Dates;
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