1 files changed, 139 insertions, 0 deletions
diff --git a/core/src/Model/TransactionsModel.cpp b/core/src/Model/TransactionsModel.cpp
new file mode 100644
index 0000000..6035528
--- /dev/null
+++ b/core/src/Model/TransactionsModel.cpp
@@ -0,0 +1,139 @@
+#include "TransactionsModel.hpp"
+
+#include "Model/Project.hpp"
+
+#include <filesystem>
+#include <stdexcept>
+
+namespace fs = std::filesystem;
+
+SalesTable::SalesTable(TransactionModel& db)
+	// language=SQLite
+	: GetRowsStatement(db.GetSQLite(), R"""(
+SELECT * FROM Sales WHERE rowid >= ? AND rowid < ?
+)""")
+	// language=SQLite
+	// TODO
+	, FilterRowsStatement(db.GetSQLite(), R"""(
+)""") {
+}
+
+DeliveryTable::DeliveryTable(TransactionModel& db) {
+}
+
+PurchasesTable::PurchasesTable(TransactionModel& db) {
+}
+
+static std::string GetDatabaseFilePath(const Project& project) {
+	auto dbsDir = project.GetPath() / "databases";
+	fs::create_directories(dbsDir);
+
+	auto dbFile = dbsDir / "transactions.sqlite3";
+	return dbFile.string();
+}
+
+/// Wrapper for SQLite::Database that creates the default tables
+TransactionModel::DatabaseWrapper::DatabaseWrapper(TransactionModel& self)
+	: mSqlite(GetDatabaseFilePath(*self.mProject), SQLite::OPEN_READWRITE) {
+
+	// If this table doesn't exist, the database probably just got initialized
+	if (mSqlite.tableExists("Sales")) {
+		return;
+	}
+
+	// 'Sales' schema
+	// - Customer: the customer item ID
+	// - Deadline: unix epoch time of order deadline
+	// - DeliveryTime: the time this order was completed (through a set of deliveries)
+
+	// 'Purchases' schema
+	// - Factory: the factory id,
+	// - OrderTime: the time this order was made
+	// - DeliveryTime: the time this order was completed (through a set of deliveries)
+
+	// 'Deliveries' schema
+	// - SendTime: unix epoch time of sending to delivery
+	// - ArriveTime: unix epoch time of delivery arrived at warehouse; 0 if not arrived yet
+	// - AssociatedOrder: rowid of the order that this delivery is completing (which table: Outgoing=true -> Sales, Outgoing=false -> Purchases)
+	// - Outgoing: true if the delivery is from warehouse to customer; false if the delivery is from factory to warehouse
+
+	// language=SQLite
+	mSqlite.exec(R"""(
+CREATE TABLE IF NOT EXISTS Sales(
+	INT PRIMARY KEY,
+	Customer INT,
+	Deadline DATETIME,
+	DeliveryTime DATETIME
+);
+CREATE TABLE IF NOT EXISTS SalesItems(
+	SaleId INT,
+	ItemId INT,
+	Count INT
+);
+
+CREATE TABLE IF NOT EXISTS Purchases(
+    INT PRIMARY KEY,
+    Factory INT,
+    OrderTime DATETIME,
+    DeliveryTime DATETIME
+);
+CREATE TABLE IF NOT EXISTS PurchasesItems(
+     PurchaseId INT,
+     ItemId INT,
+     Count INT
+);
+
+CREATE TABLE IF NOT EXISTS Deliveries(
+     INT PRIMARY KEY,
+     SendTime DATETIME,
+     ArriveTime DATETIME,
+     AssociatedOrder INT,
+     Outgoing BOOLEAN
+);
+CREATE TABLE IF NOT EXISTS DeliveriesItems(
+      DeliveryId INT,
+      ItemId INT,
+      Count INT
+);
+)""");
+}
+
+TransactionModel::TransactionModel(Project& project)
+	: mProject{ &project }
+	, mDbWrapper(*this)
+	, mSales(*this)
+	, mPurchases(*this)
+	, mDeliveries(*this) {
+}
+
+const SQLite::Database& TransactionModel::GetSQLite() const {
+	return mDbWrapper.mSqlite;
+}
+
+SQLite::Database& TransactionModel::GetSQLite() {
+	return mDbWrapper.mSqlite;
+}
+
+const SalesTable& TransactionModel::GetSales() const {
+	return mSales;
+}
+
+SalesTable& TransactionModel::GetSales() {
+	return mSales;
+}
+
+const PurchasesTable& TransactionModel::GetPurchases() const {
+	return mPurchases;
+}
+
+PurchasesTable& TransactionModel::GetPurchases() {
+	return mPurchases;
+}
+
+const DeliveryTable& TransactionModel::GetDeliveries() const {
+	return mDeliveries;
+}
+
+DeliveryTable& TransactionModel::GetDeliveries() {
+	return mDeliveries;
+}