Attempt 1

AppServer/init.sql

@@ -0,0 +1,122 @@
+--CREATE EXTENSION IF NOT EXISTS postgis;
+CREATE EXTENSION IF NOT EXISTS hstore;
+
+CREATE DATABASE pager_data;
+CREATE USER admin WITH ENCRYPTED PASSWORD '1234';
+GRANT ALL PRIVILEGES ON DATABASE pager_data TO admin;
+
+-- === Devices ===
+CREATE TABLE Devices (
+    id SERIAL PRIMARY KEY,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+
+    euid VARCHAR(16) NOT NULL UNIQUE, -- LoRaWAN Extended Unique ID (hex, 8 bytes)
+    name VARCHAR(64) NOT NULL, -- ! Not Unique
+
+    fw_version VARCHAR(24) NOT NULL,
+
+    charge NUMERIC(5,2) CHECK (charge >= 0 AND charge <= 100), -- battery in %
+    last_online TIMESTAMPTZ, -- ! NULL
+
+    -- Location fields:
+    latitude    DOUBLE PRECISION CHECK (latitude >= -90 AND latitude <= 90),
+    longitude   DOUBLE PRECISION CHECK (longitude >= -180 AND longitude <= 180),
+    altitude    DOUBLE PRECISION
+);
+
+CREATE TABLE Messages (
+    id SERIAL PRIMARY KEY,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+
+    sender_id INT NOT NULL REFERENCES Devices(id) ON DELETE SET NULL,
+    receiver_id INT REFERENCES Devices(id) ON DELETE SET NULL, -- ! NULL
+    payload VARCHAR(256)
+);
+
+CREATE TABLE Statuses (
+    id SERIAL PRIMARY KEY,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+
+    device_id INT NOT NULL REFERENCES Devices(id) ON DELETE CASCADE,
+    payload VARCHAR(256)
+);
+
+-- === Roles ===
+CREATE TABLE Roles (
+    id SERIAL PRIMARY KEY,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+
+    name VARCHAR(64) NOT NULL UNIQUE,
+    description VARCHAR(128) NOT NULL DEFAULT 'Role description'
+);
+
+INSERT INTO Roles (name, description) VALUES ('Admin', 'Should do everything.'); -- Admin role
+
+CREATE TABLE Permissions (
+    id SERIAL PRIMARY KEY,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+
+    name VARCHAR(64) NOT NULL UNIQUE,
+    description VARCHAR(128) NOT NULL DEFAULT 'Permission description'
+);
+
+INSERT INTO Permissions (name, description) VALUES ('Everything', 'Can do everything.'); -- Admin permission
+
+-- Join table for Roles & Permissions
+CREATE TABLE RolesPermissions (
+    role_id INT NOT NULL REFERENCES Roles(id),
+    permission_id INT NOT NULL REFERENCES Permissions(id)
+);
+
+INSERT INTO RolesPermissions (role_id, permission_id) VALUES (1, 1); -- Tie together role & permission
+
+-- === Users ===
+CREATE TABLE Users (
+    id SERIAL PRIMARY KEY,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+
+    name VARCHAR(64) UNIQUE NOT NULL,
+    password VARCHAR(64) NOT NULL,
+    role_id INT DEFAULT 2 REFERENCES Roles(id) ON DELETE SET DEFAULT, -- default low privilleges
+    last_online TIMESTAMPTZ -- ! NULL
+);
+
+INSERT INTO Users (name, password, role_id) VALUES ('Admin', 'admin', 1); -- Admin user
+
+CREATE TABLE NFC_Cards (
+    id SERIAL PRIMARY KEY,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+
+    user_id INT REFERENCES Users(id) ON DELETE SET NULL, -- ! NULL
+    device_id INT REFERENCES Devices(id) ON DELETE SET NULL, -- ! NULL
+    uid VARCHAR(7) NOT NULL UNIQUE,
+    CONSTRAINT uid_length CHECK (length(uid) = 4 OR length(uid) = 7) -- Check for valid UUID
+);
+
+-- === Logs ===
+CREATE TABLE Logs (
+    id SERIAL PRIMARY KEY,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+
+    db_user TEXT DEFAULT current_user
+);
+
+CREATE TABLE LogsUsers (
+    log_id INT REFERENCES Logs(id) ON DELETE CASCADE,
+    user_id INT REFERENCES Users(id) ON DELETE CASCADE
+);
+
+CREATE TABLE LogsDevices (
+    log_id INT REFERENCES Logs(id) ON DELETE CASCADE,
+    device_id INT REFERENCES Devices(id) ON DELETE CASCADE
+);
+
+CREATE TABLE Changes (
+    id SERIAL PRIMARY KEY,
+    log_id INT NOT NULL REFERENCES Logs(id) ON DELETE CASCADE,
+    table_name TEXT NOT NULL,
+    operation TEXT NOT NULL,
+    old_value hstore, -- ! NULL
+    new_value hstore, -- ! NULL
+    CONSTRAINT change_diff CHECK (old_value != new_value)
+);