init

cards/cards.tool.js

@@ -0,0 +1,111 @@
+const config = require('../config.js');
+const crypto = require('crypto');
+const CardModel = require('../cards/cards.model');
+
+const CardTool = {};
+
+CardTool.getPackCards = async(pack) =>
+{
+    var pack_cards = await CardModel.getByPack(pack.tid);
+
+    var cards = [];
+    for(var i=0; i<pack.cards; i++)
+    {
+        if(pack.random)
+        {
+            //Randomized set
+            var rarity_tid = CardTool.getRandomRarity(pack, i==0);
+            var variant_tid = CardTool.getRandomVariant(pack);
+            var rarity_cards = CardTool.getCardArray(pack_cards, rarity_tid);
+            var card = CardTool.getRandomCard(rarity_cards);
+            if(card)
+            {
+                var cardQ = {tid: card.tid, variant: variant_tid, quantity: 1};
+                cards.push(cardQ);
+            }
+        }
+        else if(i < pack_cards.length)
+        {
+            //Fixed set
+            var card = pack_cards[i];
+            var variant_tid = CardTool.getRandomVariant(pack);
+			var cardQ = {tid: card.tid, variant: variant_tid, quantity: 1};
+            cards.push(cardQ);
+        }
+    }
+    return cards;
+};
+
+CardTool.getRandomRarity = (pack, is_first) =>
+{
+    var rarities = is_first ? pack.rarities_1st : pack.rarities;
+    if(!rarities || rarities.length == 0)
+        return ""; //Any rarity
+
+    var total = 0;
+    for(var rarity of rarities) {
+        total += rarity.value;
+    }
+
+    var rvalue = Math.floor(Math.random()*total);
+
+    for(var i=0; i<rarities.length; i++)
+    {
+        var rarity = rarities[i];
+        if(rvalue < rarity.value)
+        {
+            return rarity.tid;
+        }
+        rvalue -= rarity.value;
+    }
+    return "";
+};
+
+CardTool.getRandomVariant = (pack) =>
+{
+    var variants = pack.variants;
+    if(!variants || variants.length == 0)
+        return "";
+
+    var total = 0;
+    for(var variant of variants) {
+        total += variant.value;
+    }
+
+    var rvalue = Math.floor(Math.random()*total);
+
+    for(var i=0; i<variants.length; i++)
+    {
+        var variant = variants[i];
+        if(rvalue < variant.value)
+        {
+            return variant.tid; 
+        }
+        rvalue -= variant.value;
+    }
+    return "";
+};
+
+CardTool.getCardArray = (all_cards, rarity) =>
+{
+    var valid_cards = [];
+    for(var i=0; i<all_cards.length; i++)
+    {
+        var card = all_cards[i];
+        if(!rarity || card.rarity == rarity)
+            valid_cards.push(card);
+    }
+    return valid_cards;
+}
+
+CardTool.getRandomCard = (all_cards, suffix) =>
+{
+    if(all_cards.length > 0)
+    {
+        var card = all_cards[Math.floor(Math.random()*all_cards.length)];
+        return card;
+    }
+    return null;
+};
+
+module.exports = CardTool;