1 files changed, 47 insertions, 0 deletions
diff --git a/graphs/js/intergalactic/destinations.js b/graphs/js/intergalactic/destinations.js
new file mode 100644
index 0000000..c184458
--- /dev/null
+++ b/graphs/js/intergalactic/destinations.js
@@ -0,0 +1,47 @@
+function displayDestinations(destinations) {
+    if (
+        !(destinations instanceof Map) ||
+        destinations == null ||
+        destinations == undefined ||
+        destinations.size === 0
+    ) {
+        console.log("No destination is available.");
+    } else {
+        destinations.forEach((v, k) => {
+            console.log(k + ": " + v);
+        });
+    }
+}
+function addDestination(destinations, name, cost) {
+    if (
+        typeof name != "string" ||
+        typeof cost != "number" ||
+        cost < 0 ||
+        destinations.has(name)
+    ) {
+        return false;
+    }
+
+    destinations.set(name, cost);
+    return true;
+}
+function removeDestination(destinations, name) {
+    if (typeof name != "string" || !destinations.has(name)) {
+        return false;
+    } else {
+        destinations.delete(name);
+        return true;
+    }
+}
+function getDestinationsInOrder(destinations) {
+    const res = new Array();
+
+    destinations.forEach((v, k) => res.push([v, k]));
+    return res.sort((vkp1, vkp2) => vkp1[0] - vkp2[0]).map((vkp) => vkp[1]);
+}
+module.exports = {
+    displayDestinations,
+    addDestination,
+    removeDestination,
+    getDestinationsInOrder,
+};