Add district resource and an API to RMO

We're going to need an API for the single-page frontend

resource/district.go

@@ -0,0 +1,47 @@
+package resource
+
+import (
+	"context"
+	nhttp "github.com/Gleipnir-Technology/nidus-sync/http"
+	"github.com/Gleipnir-Technology/nidus-sync/platform"
+	"net/http"
+	//"github.com/rs/zerolog/log"
+)
+
+type districtR struct {
+	router *router
+}
+
+type district struct {
+	Name    string `json:"name"`
+	URLLogo string `json:"url_logo"`
+}
+
+func District(r *router) *districtR {
+	return &districtR{
+		router: r,
+	}
+}
+
+func (res *districtR) List(ctx context.Context, r *http.Request, query QueryParams) ([]*district, *nhttp.ErrorWithStatus) {
+	organizations, err := platform.OrganizationList(ctx)
+	if err != nil {
+		return nil, nhttp.NewError("list orgs: %w", err)
+	}
+	districts := make([]*district, 0)
+	for _, org := range organizations {
+		slug := org.Slug()
+		if slug == "" {
+			continue
+		}
+		logo, err := res.router.SlugToURI("district.logo.BySlug", slug)
+		if err != nil {
+			return nil, nhttp.NewError("logo url: %w", err)
+		}
+		districts = append(districts, &district{
+			Name:    org.Name(),
+			URLLogo: logo,
+		})
+	}
+	return districts, nil
+}

resource/router.go

@@ -59,6 +59,18 @@ func (r *router) IDToURI(route string, id int) (string, error) {
 	uri.Scheme = "https"
 	return uri.String(), nil
 }
+func (r *router) SlugToURI(route string, slug string) (string, error) {
+	handler := r.router.Get(route)
+	if handler == nil {
+		return "", fmt.Errorf("nil handler '%s'", route)
+	}
+	uri, err := handler.URL("slug", slug)
+	if err != nil {
+		return "", fmt.Errorf("build uri: %w", err)
+	}
+	uri.Scheme = "https"
+	return uri.String(), nil
+}
 
 func (r *router) UUIDToURI(route string, u *uuid.UUID) (*string, error) {
 	if u == nil {