From dfa9548b5997d311aa597615c02628b7433a785b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christer=20War=C3=A9n?= <cwchristerw@gmail.com>
Date: Thu, 16 Sep 2021 04:46:42 +0300
Subject: [PATCH] Add Stations class

---
 src/client/classes/Stations.js | 105 +++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 src/client/classes/Stations.js

diff --git a/src/client/classes/Stations.js b/src/client/classes/Stations.js
new file mode 100644
index 0000000..4f9a631
--- /dev/null
+++ b/src/client/classes/Stations.js
@@ -0,0 +1,105 @@
+const _importDynamic = new Function('modulePath', 'return import(modulePath)');
+const fetch = (...args) => _importDynamic('node-fetch').then(({default: fetch}) => fetch(...args));
+
+module.exports = class {
+    constructor() {
+        this.list = new Array();
+        this.logger = require("../funcs/logger.js");
+    }
+
+    async fetch(options){
+        try {
+            this.logger('Stations', 'Started fetching list – ' + options.url);
+            let list = await fetch(options.url)
+                .then(this.checkFetchStatus)
+                .then(response => response.json());
+
+            if(!this.list){
+                this.logger('Stations');
+                this.list.forEach(station => {
+                    console.log("- " + station.name);
+                });
+                console.log("\n");
+            }
+
+            this.list = list;
+            this.logger('Stations', 'Successfully fetched list');
+        } catch (error) {
+            this.logger('Stations', 'Fetching list failed');
+            console.error(error + "\n");
+
+            this.fetch(options);
+        }
+    }
+
+    checkFetchStatus(response) {
+        if (response.ok) { // res.status >= 200 && res.status < 300
+            return response;
+        } else {
+            throw new Error(response.status + " " + response.statusText);
+        }
+    }
+
+    search(key) {
+        if (this.list === null) return false;
+        let foundStations = [];
+        if (!key) return false;
+        if (key == "radio") return false;
+
+        this.list
+            .filter(
+                x => x.name.toUpperCase().includes(key.toUpperCase()) || x === key
+            )
+            .forEach(x =>
+                foundStations.push({ station: x, name: x.name, probability: 100 })
+            );
+
+        if (key.startsWith("radio ")) key = key.slice(6);
+        const probabilityIncrement = 100 / key.split(" ").length / 2;
+        for (let i = 0; i < key.split(" ").length; i++) {
+            this.list
+                .filter(
+                    x => x.name.toUpperCase().includes(key.split(" ")[i].toUpperCase()) || x === key
+                )
+                .forEach(x =>
+                    foundStations.push({ station: x, name: x.name, probability: probabilityIncrement })
+                );
+        }
+        if (foundStations.length === 0) return false;
+        for (let i = 0; i < foundStations.length; i++) {
+            for (let j = 0; j < foundStations.length; j++) {
+                if (foundStations[i] === foundStations[j] && i !== j) foundStations.splice(i, 1);
+            }
+        }
+        for (let i = 0; i < foundStations.length; i++) {
+            if (foundStations[i].name.length > key.length) {
+                foundStations[i].probability -=
+                    (foundStations[i].name.split(" ").length - key.split(" ").length) *
+                    (probabilityIncrement * 0.5);
+            } else if (foundStations[i].name.length === key.length) {
+                foundStations[i].probability += probabilityIncrement * 0.9;
+            }
+
+            for (let j = 0; j < key.split(" ").length; j++) {
+                if (!foundStations[i].name.toUpperCase().includes(key.toUpperCase().split(" ")[j])) {
+                    foundStations[i].probability -= probabilityIncrement * 0.5;
+                }
+            }
+        }
+        let highestProbabilityStation;
+        for (let i = 0; i < foundStations.length; i++) {
+            if (
+                !highestProbabilityStation ||
+                highestProbabilityStation.probability < foundStations[i].probability
+            )
+                highestProbabilityStation = foundStations[i];
+            if (
+                highestProbabilityStation &&
+                highestProbabilityStation.probability === foundStations[i].probability
+            ) {
+                highestProbabilityStation = foundStations[i].station;
+            }
+        }
+        return highestProbabilityStation;
+    }
+};