Add start to day 7 part i solution

7/7_1.ts

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+import { LoadInput } from "../common.ts";
+import { type CamelCardsHand, CamelCardRanking } from "./7_common.ts";
+
+const tests = [
+    "32T3K 765",
+    "T55J5 684",
+    "KK677 28",
+    "KTJJT 220",
+    "QQQJA 483",
+];
+
+const tests_reddit = [
+    "2345A 1",
+    "Q2KJJ 13",
+    "Q2Q2Q 19",
+    "T3T3J 17",
+    "T3Q33 11",
+    "2345J 3",
+    "J345A 2",
+    "32T3K 5",
+    "T55J5 29",
+    "KK677 7",
+    "KTJJT 34",
+    "QQQJA 31",
+    "JJJJJ 37",
+    "JAAAA 43",
+    "AAAAJ 59",
+    "AAAAA 61",
+    "2AAAA 23",
+    "2JJJJ 53",
+    "JJJJ2 41",
+];
+
+const input = await LoadInput(7);
+
+// Parse the input
+const parsedHands = ParseInput(tests_reddit);
+// Sort the cards
+const sortedHands = parsedHands.sort(SortHands);
+
+console.log(sortedHands);
+
+// Find the input
+let totalWinnings = 0;
+sortedHands.forEach((hand, idx) => {
+    totalWinnings += hand.Bid * (idx + 1);
+});
+
+// Wrong answers
+// 248305851 -- too high
+console.log(`The total winnings are $${totalWinnings}`);
+
+
+/**
+ * Parse the input
+ *
+ * @param {string[]} handList An array of strings represnting hands of Camel Cards and their bids
+ * @returns {CamelCardsHand[]} An array of parsed Camel Card hands
+ */
+function ParseInput(handList: string[]): CamelCardsHand[] {
+    const output: CamelCardsHand[] = [];
+
+    handList.forEach((hand) => {
+        const [handStr, bidStr] = hand.split(" ");
+        output.push({
+            Hand: handStr,
+            Bid: Number(bidStr),
+            Rank: FindCamelCardRank(handStr),
+        });
+    })
+
+    return output;
+}
+
+/**
+ * Assign a base rank to a hand of Camel Cards
+ * 
+ * Assigns a Camel Card Ranking to a hand of cards based on the
+ * strength of the hand on its own.
+ * 
+ * @param {string} hand The hand a player drew
+ * @returns {CamelCardRanking} The ranking of the hand
+ */
+function FindCamelCardRank(hand: string): CamelCardRanking {
+    const cardFacesSorted = hand.split("").sort().join("");
+
+    const threeOfKind = new RegExp("(.)(?!\\1\\1)", "g");
+    const twoOfKind = new RegExp("(.)(?!\\1)", "g");
+
+    if (cardFacesSorted.replace(twoOfKind, "").length == 0) {
+        return CamelCardRanking.HIGH_CARD;
+    }
+    else if(cardFacesSorted.replace(twoOfKind, "").length == 1) {
+        return CamelCardRanking.ONE_PAIR;
+    }
+    else if(cardFacesSorted.replace(threeOfKind, "").length == 1) {
+        return CamelCardRanking.THREE_OF_A_KIND;
+    }
+    // Could technically be a three of a kind, but the threeOfKind case will catch
+    // that, meaning this could only be a two pair
+    else if(cardFacesSorted.replace(twoOfKind, "").length == 2) {
+        return CamelCardRanking.TWO_PAIR;
+    }
+    // Could technically be a three of a kind, but the threeOfKind case will catch
+    // that, meaning this could only be a full house
+    else if(cardFacesSorted.replace(twoOfKind, "").length == 3) {
+        return CamelCardRanking.FULL_HOUSE;
+    }
+    else if(cardFacesSorted.replace(twoOfKind, "").length == 3) {
+        return CamelCardRanking.FOUR_OF_A_KIND;
+    }
+    else if(cardFacesSorted.replace(twoOfKind, "").length == 4) {
+        return CamelCardRanking.FIVE_OF_A_KIND;
+    }
+    else {
+        throw new Error(`Unsure how we reached this condition!\nSorted hand was: ${cardFacesSorted}`);
+    }
+}
+
+/**
+ * Compare two hands of Camel Cards for sorting
+ */
+function SortHands(a: CamelCardsHand, b: CamelCardsHand): number {
+    if (a.Rank < b.Rank) { return -1; }
+    if (a.Rank > b.Rank) { return 1;  }
+
+    // Replace the letters with something easier to compare
+    const aHand = a.Hand.replaceAll("A", "Z").replaceAll("K", "Y").replaceAll("Q", "X").replaceAll("J", "W").replaceAll("T", "V");
+    const bHand = b.Hand.replaceAll("A", "Z").replaceAll("K", "Y").replaceAll("Q", "X").replaceAll("J", "W").replaceAll("T", "V");
+
+    for (let i = 0; i < 5; i++) {
+        if (aHand[i] < bHand[i]) {
+            return -1;
+        }
+        if (aHand[i] > bHand[i]) {
+            return 1;
+        }
+    }
+
+    return 0;
+}

7/7_common.ts

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+
+/**
+ * A hand for a game of Camel Cards
+ */
+export type CamelCardsHand = {
+    /** The hand the player was dealt */
+    Hand: string,
+    /** The amount the player bid on that hand */
+    Bid: number
+    /** The ranking of the hand */
+    Rank: CamelCardRanking,
+};
+
+/**
+* The ranking of Camel Card hand types
+*/
+export enum CamelCardRanking {
+   HIGH_CARD,
+   ONE_PAIR,
+   TWO_PAIR,
+   THREE_OF_A_KIND,
+   FULL_HOUSE,
+   FOUR_OF_A_KIND,
+   FIVE_OF_A_KIND,
+}