Added stations command

README.md

@@ -23,7 +23,16 @@ Returns the next to arrive between the src and dest stations.
 
 
 ### septa stations
-TODO: Will list the stations.
+Returns the list of stations
+
+    $ septa stations
+
+    9th St
+    30th Street Station
+    49th St
+    Airport Terminal A
+    Airport Terminal B
+    ...
 
 
 ### Alerts

cmd/septa/septa.go

@@ -12,9 +12,10 @@ var funcMap map[string]func(context.Context)
 
 func init() {
 	funcMap = map[string]func(context.Context){
-		"help":    Usage,
-		"next":    NextToArrive,
-		"version": Version,
+		"help":     Usage,
+		"next":     NextToArrive,
+		"stations": Stations,
+		"version":  Version,
 	}
 }
 
@@ -28,8 +29,9 @@ func Usage(ctx context.Context) {
 	fmt.Printf(`
 Usage:
 
-septa next [from-station] [to-station]
-septa version   ; prints the commit version
+septa stations [pattern]                   ; list stations, or match pattern
+septa next [from-station] [to-station]     ; show the next to arrive
+septa version                              ; prints the commit version
 `)
 
 }

cmd/septa/station.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/dherbst/septa"
+)
+
+// Stations command lists the stations that acceptable for Next To Arrive.
+func Stations(ctx context.Context) {
+	for _, v := range septa.Stations {
+		fmt.Printf("%v\n", v)
+	}
+}

station.go

@@ -1,6 +1,7 @@
 package septa
 
-var stations = []string{
+// Stations is the list of valid station names for next to arrive
+var Stations = []string{
 	"9th St",
 	"30th Street Station",
 	"49th St",
@@ -160,7 +161,7 @@ var stations = []string{
 
 // IsValidStation returns whether the station is a valid station.
 func IsValidStation(station string) bool {
-	for _, v := range stations {
+	for _, v := range Stations {
 		if station == v {
 			return true
 		}