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authorJulien Dessaux2024-03-17 01:26:51 +0100
committerJulien Dessaux2024-03-17 01:27:44 +0100
commit1b1df83ffd68ff1a8c62fc7d6bef1a1fde19cb6b (patch)
treec8c153795d610525c2e4eedd99502b15f54566d1 /nodejs/database
parent[javascript] refactoring (diff)
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[javascript] Implementing market data gathering and caching
Diffstat (limited to '')
-rw-r--r--nodejs/database/004_markets.sql7
-rw-r--r--nodejs/database/db.js1
-rw-r--r--nodejs/database/markets.js34
3 files changed, 42 insertions, 0 deletions
diff --git a/nodejs/database/004_markets.sql b/nodejs/database/004_markets.sql
new file mode 100644
index 0000000..668e4d7
--- /dev/null
+++ b/nodejs/database/004_markets.sql
@@ -0,0 +1,7 @@
+CREATE TABLE markets (
+ id INTEGER PRIMARY KEY,
+ system TEXT NOT NULL,
+ data JSON NOT NULL
+);
+CREATE INDEX markets_system on markets (system);
+CREATE UNIQUE INDEX markets_symbol on markets(json_extract(data, '$.symbol'));
diff --git a/nodejs/database/db.js b/nodejs/database/db.js
index 78fa0dd..4438fec 100644
--- a/nodejs/database/db.js
+++ b/nodejs/database/db.js
@@ -6,6 +6,7 @@ const allMigrations = [
'database/001_systems.sql',
'database/002_ships.sql',
'database/003_surveys.sql',
+ 'database/004_markets.sql',
];
const db = new Database(
diff --git a/nodejs/database/markets.js b/nodejs/database/markets.js
new file mode 100644
index 0000000..522f57f
--- /dev/null
+++ b/nodejs/database/markets.js
@@ -0,0 +1,34 @@
+import db from './db.js';
+import * as utils from '../lib/utils.js';
+
+const addMarketStatement = db.prepare(`INSERT INTO markets(system, data) VALUES (?, json(?));`);
+const getMarketAtWaypointStatement = db.prepare(`SELECT data FROM markets WHERE data->>'symbol' = ?;`);
+const getMarketsInSystemStatement = db.prepare(`SELECT data FROM markets WHERE system = ?;`);
+const updateMarketStatement = db.prepare(`UPDATE markets SET data = json(:data) WHERE data->>'symbol' = :symbol;`);
+
+export function getMarketAtWaypoint(symbol) {
+ const data = getMarketAtWaypointStatement.get(symbol);
+ if (data === undefined) {
+ return null;
+ }
+ return JSON.parse(data.data);
+}
+
+export function getMarketsInSystem(symbol) {
+ const data = getMarketsInSystemStatement.get(symbol);
+ if (data === undefined) {
+ return null;
+ }
+ return JSON.parse(data.data);
+}
+
+export function setMarket(data) {
+ if (getMarketAtWaypoint(data.symbol) === null) {
+ const system = utils.systemFromWaypoint(data.symbol);
+ return addMarketStatement.run(system, JSON.stringify(data)).lastInsertRowid;
+ }
+ return updateMarketStatement.run({
+ data: JSON.stringify(data),
+ symbol: data.symbol,
+ }).changes;
+}