Implemented tracking command

README.md

@@ -25,6 +25,12 @@ Example:
 zeit track --project project --task task --begin -0:15
 ```
 
+### Check currently tracking
+
+```
+zeit tracking
+```
+
 ### Finish tracking
 
 ```

z/tracking.go

@@ -0,0 +1,47 @@
+package z
+
+import (
+  "os"
+  "fmt"
+  "github.com/spf13/cobra"
+)
+
+var trackingCmd = &cobra.Command{
+  Use:   "tracking",
+  Short: "Currently tracking activity",
+  Long: "Show currently tracking activity.",
+  Run: func(cmd *cobra.Command, args []string) {
+    user := GetCurrentUser()
+
+    runningEntryId, err := database.GetRunningEntryId(user)
+    if err != nil {
+      fmt.Printf("△ %+v\n", err)
+      os.Exit(1)
+    }
+
+    if runningEntryId == "" {
+      fmt.Printf("□ not running\n")
+      os.Exit(1)
+    }
+
+    runningEntry, err := database.GetEntry(user, runningEntryId)
+    if err != nil {
+      fmt.Printf("△ %+v\n", err)
+      os.Exit(1)
+    }
+
+    fmt.Printf(runningEntry.GetOutputForTrack(true, true))
+    return
+  },
+}
+
+func init() {
+  rootCmd.AddCommand(trackingCmd)
+
+  var err error
+  database, err = InitDatabase()
+  if err != nil {
+    fmt.Printf("△ %+v\n", err)
+    os.Exit(1)
+  }
+}