[javascript] added contracts and agent database management

nodejs/database/000_init.sql

@@ -5,3 +5,12 @@ CREATE TABLE tokens (
 	id INTEGER PRIMARY KEY,
 	data TEXT NOT NULL
 );
+CREATE TABLE agents (
+	id INTEGER PRIMARY KEY,
+	data TEXT NOT NULL
+);
+CREATE TABLE contracts (
+	id INTEGER PRIMARY KEY,
+	data TEXT NOT NULL
+);
+CREATE UNIQUE INDEX contracts_data_id ON contracts (json_extract(data, '$.id'));

nodejs/database/agents.js

@@ -0,0 +1,16 @@
+import db from './db.js';
+
+const addAgentStatement = db.prepare(`INSERT INTO agents(data) VALUES (json(?));`);
+const getAgentStatement = db.prepare(`SELECT data FROM agents;`);
+
+export function addAgent(agent) {
+	return addAgentStatement.run(JSON.stringify(agent)).lastInsertRowid;
+}
+
+export function getAgent() {
+	const data = getAgentStatement.get();
+	if (data === undefined) {
+		return null;
+	}
+	return data.data;
+}

nodejs/database/contracts.js

@@ -0,0 +1,24 @@
+import db from './db.js';
+
+const addContractStatement = db.prepare(`INSERT INTO contracts(data) VALUES (json(?));`);
+const getContractStatement = db.prepare(`SELECT data FROM contracts WHERE data->>'id' = ?;`);
+const updateContractStatement = db.prepare(`UPDATE contracts SET data = json(:data) WHERE data->>'id' = :id;`);
+
+export function getContract(id) {
+	const data = getContractStatement.get(id);
+	if (data === undefined) {
+		return null;
+	}
+	return data.data;
+}
+
+export function setContract(data) {
+	if (getContract(data.id) === null) {
+		return addContractStatement.run(JSON.stringify(data)).lastInsertRowid;
+	} else {
+		return updateContractStatement.run({
+			data: JSON.stringify(data),
+			id: data.id,
+		}).changes;
+	}
+}

nodejs/lib/contracts.js

@@ -1,3 +1,4 @@
+import * as dbContracts from '../database/contracts.js';
 import * as api from './api.js';
 import * as dbShips from '../database/ships.js';
 
@@ -6,7 +7,9 @@ export async function accept(ctx) {
 }
 
 export async function contracts() {
-	return await api.send({endpoint: '/my/contracts'});
+	const contracts = await api.send({endpoint: '/my/contracts', page: 1});
+	contracts.forEach(contract => dbContracts.setContract(contract));
+	return contracts;
 }
 
 export async function deliver(ctx) {