worked on #9, #8, #7

src/types/coordinates.ts

@@ -0,0 +1,33 @@
+export default class Coordinates {
+    mIndex : number
+    rIndex : number
+    eIndex : number
+    dIndex : number
+
+    constructor(m : number, r : number, e : number, d : number){
+        this.mIndex = m
+        this.rIndex = r
+        this.eIndex = e
+        this.dIndex = d
+    }
+
+    toString() : string {
+        return `${this.mIndex}-${this.rIndex}-${this.eIndex}-${this.dIndex}`
+    }
+
+    static toString(m : number, r : number, e : number, d : number) : string {
+        return `${m}-${r}-${e}-${d}`
+    }
+
+    static stringToCoord(strRepr : string) : Coordinates | undefined {
+        let re = /^[0-9]+-[0-9]+-[0-9]+-[0-9]+$/
+        let numbers = []
+
+        if(re.test(strRepr)){
+            numbers = strRepr.split('-')
+            
+            return new Coordinates(+numbers[0], +numbers[1], +numbers[2], +numbers[3])
+        }
+        return 
+    }
+}