feat(street-fighter): add sfpl db access layer

typescript-backend-katas/src/streetFighter/dataAccess/db.spec.ts

@@ -0,0 +1,62 @@
+import { Match } from "../models/models";
+import { getMatch, getMatches } from "./db";
+import * as path from "path";
+
+describe("getMatch", () => {
+  it('should parse a string from the CSV to get a match', async () => {
+    const input: string = "1,chun-li,2,1,sagat";
+    const match: Match = getMatch(input);
+
+    const expected: Match = {
+      fighter1: "chun-li",
+      fighter2: "sagat",
+      winner: "chun-li"
+    } 
+    expect(match).toEqual(expected);
+  })
+  it('should parse a string from the CSV to get another match', async () => {
+    const input: string = "2,chun-li,1,2,ryu";
+    const match: Match = getMatch(input);
+
+    const expected: Match = {
+      fighter1: "chun-li",
+      fighter2: "ryu",
+      winner: "ryu"
+    }
+    expect(match).toEqual(expected);
+  })
+  it('should parse a string from the CSV to get a draw', async () => {
+    const input: string = "2,chun-li,2,2,ryu";
+    const match: Match = getMatch(input);
+
+    const expected: Match = {
+      fighter1: "chun-li",
+      fighter2: "ryu",
+      winner: null
+    }
+    expect(match).toEqual(expected);
+  })
+});
+
+describe("getMatches", () => {
+  it('should parse the CSV and get two Matches', async () => {
+    const input_path = path.resolve("src/streetFighter/dataAccess/testResources/test.csv");
+    const matches: Match[] = getMatches(input_path);
+
+    const expected_matches: Match[] = [
+        {
+            fighter1: "chun-li",
+            fighter2: "sagat",
+            winner: "chun-li"
+        },
+        {
+            fighter1: "chun-li",
+            fighter2: "ryu",
+            winner: "ryu"
+        } 
+    ]
+    expect(matches).toEqual(expected_matches);
+  })
+});
+
+

typescript-backend-katas/src/streetFighter/dataAccess/db.ts

@@ -0,0 +1,31 @@
+import { Match } from "../models/models";
+import * as fs from "fs";
+
+
+export function getMatch(input: string): Match {
+    const splitString = input.split(",");
+
+    const fighter1 = splitString[1];
+    const roundsWon1 = Number(splitString[2]);
+    const roundsWon2 = Number(splitString[3]);
+    const fighter2 = splitString[4];
+
+    let winner = null;
+    if (roundsWon1 > roundsWon2) {
+        winner = fighter1;
+    } else if (roundsWon1 < roundsWon2) {
+        winner = fighter2;
+    }
+
+    return{
+        fighter1: fighter1,
+        fighter2: fighter2,
+        winner: winner,
+    }
+}
+
+export function getMatches(filePath: string): Match[] {
+    const allContents = fs.readFileSync(filePath, 'utf-8');
+    return allContents.split(/\r?\n/).slice(1).filter(line => line).map(getMatch);
+}
+

typescript-backend-katas/src/streetFighter/dataAccess/testResources/test.csv

@@ -0,0 +1,3 @@
+timeslot,home,roundsWon1,roundsWon2,away
+1,chun-li,2,1,sagat
+1,chun-li,1,2,ryu

typescript-backend-katas/src/streetFighter/models/models.ts

@@ -0,0 +1,5 @@
+export interface Match {
+    fighter1: string;
+    fighter2: string;
+    winner: string | null;
+}