Pipes - Sarah Read-Brown - JS Scrabble

scrabble.js

@@ -1,14 +1,80 @@
-const Scrabble = {
-  score: function(word) {
-    // TODO: implement score
-  }
+const scores = {
+  A:1, B:3, C:3, D:2, E:1, F:4, G:2, H:4, I:1, J:8, K:5, L:1, M:3, N:1, O:1, P:3, Q:10, R:1, S:1, T:1, U:1, V:4, W:4, X:8, Y:4, Z:10
+};
 
-  // TODO: add the highestScoreFrom method
+const Scrabble = {
+  score: function(word){
+    let scoreTotal = 0;
+    // regex below should return false for white space, non a-zA-Z characters, 1 letter or 7+ letter words
+    if (/^[a-zA-Z]{1,7}$/.test(word)){
+      for (let letter of word) {
+        scoreTotal += scores[letter.toUpperCase()];
+      }
+      if (word.length === 7){
+        scoreTotal += 50;
+      }
+    } else {
+      throw `Users word '${word}' was not playable. Scrabble words must be between 2-7 letters, contain no white space, and may not have non-alphabet characters.`;
+    }
+    return scoreTotal;
+  },
 
+  highestScoreFrom: function(arrWords){
+    // this if statement will throw an exception is any of the following are true (1) the input is not an array (2) the length = 0
+    let wordsAndScores = {};
+    if (!Array.isArray(arrWords) || arrWords.length === 0 ) {
+      throw `Error: Input in ${this.name} must be data type Array and must have at least one element`;
+    } else if (arrWords.length === 1) {
+      return arrWords[0];
+    } else {
+      let topWord = arrWords[0];
+      arrWords.forEach(function(word) {
+        let scored = Scrabble.score(word);
+        if(scored > Scrabble.score(topWord)){
+          topWord = word;
+        } else if (scored === Scrabble.score(topWord)){
+          if(word.length === 7){
+            topWord = word;
+          } else if (word.length < topWord.length && topWord.length !== 7) {
+            topWord = word;
+          }
+        }
+      });
+      return topWord;
+    }
+  }
 };
 
 Scrabble.Player = class {
-  // TODO: implement the Player class
+  constructor(name) {
+    if (name === undefined) {
+      throw 'Players without names cannot play scrabble';
+    }
+    this.name = name;
+    this.plays = [];
+  }
+
+  plays() {
+    return this.plays;
+  }
+
+  totalScore() {
+    let playerScore = this.plays.reduce((sum, value) => sum + Scrabble.score(value), 0);
+    return playerScore;
+  }
+
+  play(word) {
+    if (!/^[a-zA-Z]{1,7}$/.test(word)) {
+      throw `Users word '${word}' was not playable. Scrabble words must be between 2-7 letters, contain no white space, and may not have non-alphabet characters.`;
+    }
+    if (this.hasWon()) {
+      return false;
+    } else {
+      this.plays.push(word);
+      return true;
+    }
+  }
+
 };
 
 module.exports = Scrabble;