refactor: migrate JSON function to new package

We now use it to help read remote docker registries also.

catalogue/catalogue.go

@@ -11,6 +11,7 @@ import (
 	"time"
 
 	"coopcloud.tech/abra/config"
+	"coopcloud.tech/abra/web"
 	"github.com/go-git/go-git/v5"
 	"github.com/go-git/go-git/v5/plumbing"
 )
@@ -204,7 +205,7 @@ func readAppsCatalogueFS(target interface{}) error {
 }
 
 func readAppsCatalogueWeb(target interface{}) error {
-	if err := readJson(appsCatalogueURL, &target); err != nil {
+	if err := web.ReadJSON(appsCatalogueURL, &target); err != nil {
 		return err
 	}
 

client/registry.go

@@ -1,7 +1,9 @@
 package client
 
 import (
-	"github.com/docker/distribution/reference"
+	"fmt"
+
+	"coopcloud.tech/abra/web"
 )
 
 type Tag struct {
@@ -13,7 +15,13 @@ type Tags []Tag
 
 var registryURL = "https://registry.hub.docker.com/v1/repositories/%s/tags"
 
-func ReadRegistryTags(image reference.Named, target interface{}) ([]string, error) {
-	// tagsUrl := fmt.Sprintf(registryURL, image.Name())
-	return nil, nil
+func GetRegistryTags(image string) (Tags, error) {
+	var tags Tags
+
+	tagsUrl := fmt.Sprintf(registryURL, image)
+	if err := web.ReadJSON(tagsUrl, &tags); err != nil {
+		return tags, err
+	}
+
+	return tags, nil
 }

web/web.go

@@ -1,4 +1,4 @@
-package catalogue
+package web
 
 import (
 	"encoding/json"
@@ -6,7 +6,8 @@ import (
 	"time"
 )
 
-func readJson(url string, target interface{}) error {
+// ReadJSON reads JSON and parses it into your chosen interface pointer
+func ReadJSON(url string, target interface{}) error {
 	httpClient := &http.Client{Timeout: 5 * time.Second}
 	res, err := httpClient.Get(url)
 	if err != nil {