update gates lookup to export is current data; update compiled gates …

…data; improved docs

Makefile

@@ -0,0 +1,2 @@
+compile-gates:
+	go run -mod vendor cmd/compile-gates-data/main.go

cmd/lookup/main.go

@@ -15,7 +15,7 @@ import (
 
 func main() {
 
-	lookup_uri := flag.String("lookup-uri", "", "...")
+	lookup_uri := flag.String("lookup-uri", "", "Valid options are: gates://, galleries://")
 
 	flag.Parse()
 

galleries/galleries.go

@@ -19,6 +19,8 @@ type Gallery struct {
 	Inception string `json:"edtf:inception"`
 	// The (EDTF) cessation date for the gallery
 	Cessation string `json:"edtf:cessation"`
+	// A Who's On First "existential" (`KnownUnknownFlag`) flag signaling the gate's status
+	// IsCurrent string `json:"mz:is_current"`
 }
 
 // String() will return the name of the gallery.

gates/compile.go

@@ -54,9 +54,16 @@ func CompileGatesData(ctx context.Context, iterator_uri string, iterator_sources
 		wof_id := whosonfirst.Id(f)
 		name := whosonfirst.Name(f)
 
+		fl, err := whosonfirst.IsCurrent(f)
+
+		if err != nil {
+			return fmt.Errorf("Failed to derive is current status for %s, %v", path, err)
+		}
+
 		g := &Gate{
 			WhosOnFirstId: wof_id,
 			Name:          name,
+			IsCurrent:     fl.StringFlag(),
 		}
 
 		mu.Lock()

gates/gates.go

@@ -1,15 +1,21 @@
 // package gates provides methods for working with boarding gates at SFO.
 package gates
 
+import (
+	"fmt"
+)
+
 // type Gate is a struct representing a passenger gate at SFO.
 type Gate struct {
 	// The Who's On First ID associated with this gate.
 	WhosOnFirstId int64 `json:"wof:id"`
 	// The name of this gate.
 	Name string `json:"wof:name"`
+	// A Who's On First "existential" (`KnownUnknownFlag`) flag signaling the gate's status
+	IsCurrent string `json:"mz:is_current"`
 }
 
 // String() will return the name of the gate.
 func (g *Gate) String() string {
-	return g.Name
+	return fmt.Sprintf("%d %s (%s)", g.WhosOnFirstId, g.Name, g.IsCurrent)
 }