Initial model + some various changes

backend/sql/version_1.sql

@@ -0,0 +1,64 @@
+-- Version 1 is the initial structure.
+CREATE TABLE Version (
+    id INTEGER PRIMARY KEY,
+    version INTEGER NOT NULL UNIQUE,
+    datetime DATETIME
+);
+
+CREATE TABLE User (
+    id INTEGER PRIMARY KEY,
+    email TEXT NOT NULL,
+    password TEXT NOT NULL, -- Hashed and salted.
+    name TEXT NOT NULL
+);
+
+CREATE TABLE Recipe (
+    id INTEGER PRIMARY KEY,
+    user_id INTEGER NOT NULL,
+    title TEXT NOT NULL,
+    estimate_time INTEGER,
+    description DATETIME,
+
+    FOREIGN KEY(user_id) REFERENCES User(id)
+);
+
+CREATE TABLE Quantity (
+    id INTEGER PRIMARY KEY,
+    value REAL,
+    unit TEXT
+);
+
+CREATE TABLE Ingredient (
+    id INTEGER PRIMARY KEY,
+    name TEXT NOT NULL,
+    quantity_id INTEGER,
+    input_step_id INTEGER NOT NULL,
+
+    FOREIGN KEY(quantity_id) REFERENCES Quantity(id),
+    FOREIGN KEY(input_step_id) REFERENCES Step(id)
+);
+
+CREATE TABLE [Group] (
+    id INTEGER PRIMARY KEY,
+    name TEXT
+);
+
+CREATE TABLE Step (
+    id INTEGER PRIMARY KEY,
+    action TEXT NOT NULL,
+    group_id INTEGER NOT NULL,
+
+    FOREIGN KEY(group_id) REFERENCES [Group](id)
+);
+
+CREATE TABLE IntermediateSubstance (
+    id INTEGER PRIMARY KEY,
+    name TEXT NOT NULL,
+    quantity_id INTEGER,
+    output_step_id INTEGER NOT NULL,
+    input_step_id INTEGER NOT NULL,
+
+    FOREIGN KEY(quantity_id) REFERENCES Quantity(id),
+    FOREIGN KEY(output_step_id) REFERENCES Step(id),
+    FOREIGN KEY(input_step_id) REFERENCES Step(id)
+);