E2E List cmd and added API calls (#3)

* Completed List cmd and added API calls

* Minor comments and add delete code to pass linting

* Typo in descriptions

* Minor comments

* Validations

* Validations-1

* improved branch flag validation

* removed build

* Minor comments and Readme

cmd/list.go

@@ -2,6 +2,7 @@ package cmd
 
 import (
 	"fmt"
+	"log"
 
 	"github.com/spf13/cobra"
 )
@@ -10,9 +11,10 @@ func init() {
 	rootCmd.AddCommand(listCmd)
 	listCmd.Flags().StringP("repo", "R", "", "Select another repository for finding actions cache.")
 	listCmd.Flags().StringP("branch", "B", "", "Filter by branch")
+	listCmd.Flags().IntP("limit", "", 30, "Maximum number of items to fetch (default is 30, max limit is 100)")
 	listCmd.Flags().StringP("key", "", "", "Filter by key")
 	listCmd.Flags().StringP("order", "", "", "Order of caches returned (asc/desc)")
-	listCmd.Flags().StringP("sort", "", "", "Sort fetched caches (used/size/created)")
+	listCmd.Flags().StringP("sort", "", "", "Sort fetched caches (last-used/size/created-at)")
 	listCmd.SetHelpTemplate(getListHelp())
 }
 
@@ -21,20 +23,64 @@ var listCmd = &cobra.Command{
 	Short: "Lists the actions cache",
 	Long:  `Lists the actions cache`,
 	Run: func(cmd *cobra.Command, args []string) {
-		repo, _ := cmd.Flags().GetString("repo")
+		COMMAND = "list"
+
+		if len(args) != 0 {
+			fmt.Printf("Invalid argument(s). Expected 0 received %d\n", len(args))
+			fmt.Println(getListHelp())
+			return
+		}
+
+		r, _ := cmd.Flags().GetString("repo")
 		branch, _ := cmd.Flags().GetString("branch")
+		limit, _ := cmd.Flags().GetInt("limit")
 		key, _ := cmd.Flags().GetString("key")
 		order, _ := cmd.Flags().GetString("order")
 		sort, _ := cmd.Flags().GetString("sort")
-		fmt.Println("LIST")
-		fmt.Println(repo)
-		fmt.Println(branch)
-		fmt.Println(key)
-		fmt.Println(order)
-		fmt.Println(sort)
+
+		repo, err := getRepo(r)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		validateInputs(sort, order, limit)
+
+		if branch == "" && key == "" {
+			totalCacheSize := getCacheUsage(repo)
+			fmt.Printf("Total caches size %s\n\n", formatCacheSize(totalCacheSize))
+		}
+
+		queryParams := generateQueryParams(branch, limit, key, order, sort)
+		caches := listCaches(repo, queryParams)
+
+		fmt.Printf("Showing %d of %d cache entries in %s/%s\n\n", displayedEntriesCount(len(caches), limit), len(caches), repo.Owner(), repo.Name())
+		for _, cache := range caches {
+			fmt.Printf("%s\t [%s]\t %s\t %s\n", cache.Key, formatCacheSize(cache.Size), cache.Ref, cache.LastAccessedAt)
+		}
 	},
 }
 
+func displayedEntriesCount(totalCaches int, limit int) int {
+	if totalCaches < limit {
+		return totalCaches
+	}
+	return limit
+}
+
+func validateInputs(sort string, order string, limit int){
+	if order != "" && order != "asc" && order != "desc"{
+		log.Fatal(fmt.Errorf(fmt.Sprintf("%s is not a valid value for order flag. Allowed values: asc/desc", order)))
+	}
+
+	if sort != "" && sort != "last-used" && sort != "size" && sort != "created-at"{
+		log.Fatal(fmt.Errorf(fmt.Sprintf("%s is not a valid value for sort flag. Allowed values: last-used/size/created-at", sort)))
+	}
+
+	if limit < 1{
+		log.Fatal(fmt.Errorf(fmt.Sprintf("%d is not a valid value for limit flag. Allowed values: > 1", limit)))
+	}
+}
+
 func getListHelp() string {
 	return `
 gh-actions-cache: Works with GitHub Actions Cache. 
@@ -48,9 +94,10 @@ ARGUMENTS:
 FLAGS:
 	-R, --repo <[HOST/]owner/repo>		Select another repository using the [HOST/]OWNER/REPO format
 	-B, --branch <string>			Filter by branch
+	-L, --limit <int>			Maximum number of items to fetch (default is 30, max limit is 100)
 	--key <string>				Filter by key
 	--order <string>			Order of caches returned (asc/desc)
-	--sort <string>				Sort fetched caches (used/size/created)
+	--sort <string>				Sort fetched caches (last-used/size/created-at)
 
 INHERITED FLAGS
 	--help		Show help for command