From 61b5c8493e57c73469f31a795037922bd9d34931 Mon Sep 17 00:00:00 2001
From: Julien Dessaux
Date: Wed, 31 May 2023 01:19:31 +0200
Subject: Reworked the systems handling and caching with sqlite

---
 lib/systems.js | 85 +++++++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 61 insertions(+), 24 deletions(-)

(limited to 'lib/systems.js')

diff --git a/lib/systems.js b/lib/systems.js
index 4b480de..3cc7c7a 100644
--- a/lib/systems.js
+++ b/lib/systems.js
@@ -1,49 +1,86 @@
 import * as api from './api.js';
 import * as db from '../database/systems.js';
 
-// Retrieves a list of waypoints that have a specific ctx.trait like a SHIPYARD or a MARKETPLACE in the system ctx.symbol
-export async function trait(ctx) {
-	const s = await system(ctx);
-	return s.filter(s => s.traits.some(t => t.symbol === ctx.trait));
+// Retrieves all systems information, should be called only once after registering
+export async function init(ctx) {
+	if (db.isInit()) {
+		return;
+	}
+	for (let page=1; true; ++page) {
+		const response = await api.send({endpoint: `/systems?limit=20&page=${page}`, priority:100});
+		if (response.error !== undefined) {
+			throw response;
+		}
+		response.data.forEach(system => db.setSystem(system));
+		if (response.meta.total <= response.meta.limit * page) {
+			break;
+		}
+	}
+	console.log('Finished retrieving all systems information');
+	db.init();
 }
 
-// Retrieves a list of waypoints that have a specific ctx.type like ASTEROID_FIELD in the system ctx.symbol
-export async function type(ctx, response) {
-	const s = await system(ctx);
-	return s.filter(s => s.type === ctx.type);
+// Retrieves a shipyard's information for ctx.symbol
+export async function shipyard(ctx) {
+	const systemSymbol = ctx.symbol.match(/([^-]+-[^-]+)/)[1]; // TODO generalise this extraction
+	console.log(systemSymbol);
+	return await api.send({endpoint: `/systems/${systemSymbol}/waypoints/${ctx.symbol}/shipyard`});
 }
 
-// Retrieves the system's information for ctx.symbol and cache it in the database
+// Retrieves the system's information for ctx.symbol and caches it in the database
 export async function system(ctx) {
 	let s = db.getSystem(ctx.symbol);
 	if (s === null) {
-		const response = await api.send({endpoint: `/systems/${ctx.symbol}/waypoints?limit=20&page=1`});
+		const response = await api.send({endpoint: `/systems/${ctx.symbol}`});
 		if (response.error !== undefined) {
 			switch(response.error.code) {
 			case 404:
-				throw `Error retrieving waypoints for system ${ctx.symbol}: ${response.error.message}`;
+				throw `Error retrieving info for system ${ctx.symbol}: ${response.error.message}`;
 			default: // yet unhandled error
 				throw response;
 			}
 		}
-		if (response.meta !== undefined && response.meta.total > response.meta.limit) {
-			throw `Error retrieving waypoints for system ${ctx.symbol}: Pagination is not implemented yet!`;
-		}
 		s = response.data;
-		db.setSystem(ctx.symbol, s);
+		db.setSystem(s);
 	}
 	return s;
 }
 
-export async function systems(ctx) {
-	const response = await api.send({endpoint: `/systems?limit=20&page=1`});
-	// TODO pagination
-	return response;
+// Retrieves a list of waypoints that have a specific ctx.trait like a SHIPYARD or a MARKETPLACE in the system ctx.symbol
+export async function trait(ctx) {
+	const s = await system(ctx);
+	return s.waypoints.filter(s => s.traits.some(t => t.symbol === ctx.trait));
 }
 
-// Retrieves a shipyard's information for ctx.symbol
-export async function shipyard(ctx) {
-	const systemSymbol = ctx.symbol.match(/([^-]+-[^-]+)/)[1]; // TODO generalise this extraction
-	console.log(systemSymbol);
-	return await api.send({endpoint: `/systems/${systemSymbol}/waypoints/${ctx.symbol}/shipyard`});
+// Retrieves a list of waypoints that have a specific ctx.type like ASTEROID_FIELD in the system ctx.symbol
+export async function type(ctx, response) {
+	const s = await system(ctx);
+	return s.waypoints.filter(s => s.type === ctx.type);
+}
+
+// Retrieves the system's information for ctx.symbol and caches it in the database
+export async function waypoints(ctx) {
+	await system(ctx);
+	let updated = db.getSystemUpdated(ctx.symbol);
+	if (updated === null) {
+		let waypoints = [];
+		for (let page=1; true; ++page) {
+			const response = await api.send({endpoint: `/systems/${ctx.symbol}/waypoints?limit=20&page=${page}`, priority: 98});
+			if (response.error !== undefined) {
+				switch(response.error.code) {
+				case 404:
+					throw `Error retrieving waypoints for system ${ctx.symbol}: ${response.error.message}`;
+				default: // yet unhandled error
+					throw response;
+				}
+			}
+			waypoints = waypoints.concat(response.data);
+			if (response.meta.total <= response.meta.limit * page) {
+				break;
+			}
+		}
+		db.setSystemWaypoints(ctx.symbol, waypoints);
+		return waypoints;
+	}
+	return db.getSystem(ctx.symbol).waypoints;
 }
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