Add counts to topics

Previously, on list-topics, only a list of unqiue topics would be
displayed. With this change, each topic will now have an appearance
count next to it. The list is now also sorted by topic appearance counts
in descending order.

main.go

@@ -35,8 +35,8 @@ func main() {
 			Usage: "list all topics of starred projects",
 			Action: func(c *cli.Context) error {
 				sm.SaveIfEmpty()
-				for _, t := range sm.GetTopics() {
-					fmt.Println(t)
+				for _, pair := range sm.GetTopics() {
+					fmt.Println(pair.Key, pair.Value)
 				}
 
 				return nil

starmanager/starmanager.go

@@ -3,6 +3,7 @@ package starmanager
 import (
 	"context"
 	"log"
+	"math/rand"
 	"net/url"
 	"os"
 	"os/user"
@@ -11,7 +12,6 @@ import (
 	"strings"
 	"sync"
 	"time"
-	"math/rand"
 
 	"golang.org/x/oauth2"
 
@@ -142,7 +142,7 @@ func (s *StarManager) SaveStarredPage(pageno int, responses chan *github.Respons
 	)
 	if err != nil {
 		log.Printf(
-			"An error occurred while attempting to fetch page %d of %s's GitHub stars!",
+			"An error occurred while atresultsting to fetch page %d of %s's GitHub stars!",
 			pageno,
 			s.Username,
 		)
@@ -154,7 +154,7 @@ func (s *StarManager) SaveStarredPage(pageno int, responses chan *github.Respons
 		responses <- response
 	}
 
-	log.Printf("Attempting to save starred projects on page %d...\n", pageno)
+	log.Printf("Atresultsting to save starred projects on page %d...\n", pageno)
 	for _, r := range firstPage {
 		go s.SaveStarredRepository(r.Repository, wg)
 	}
@@ -168,11 +168,11 @@ func (s *StarManager) SaveAllStars() (bool, error) {
 	responses := make(chan *github.Response, 1)
 
 	// Fetch the first page to determine the last page number from the response "Link" header
-	log.Printf("Attempting to save first page...")
+	log.Printf("Atresultsting to save first page...")
 	go s.SaveStarredPage(1, responses, &wg)
 	firstPageResponse := <-responses
 
-	log.Printf("Attempting to save the rest of the pages...")
+	log.Printf("Atresultsting to save the rest of the pages...")
 	for i := 2; i <= firstPageResponse.LastPage; i++ {
 		go s.SaveStarredPage(i, nil, &wg)
 	}
@@ -189,32 +189,37 @@ func (s *StarManager) SaveIfEmpty() {
 	}
 }
 
+// KV is a generic struct that maintains a string key - int value pair ( :( ).
+type KV struct {
+	Key   string
+	Value int
+}
+
 // GetTopics returns topics for a repository, otherwise if no repository is passed, returns
 // a list of all topics
-func (s *StarManager) GetTopics() []string {
+func (s *StarManager) GetTopics() []KV {
 	stars := []Star{}
-	allTopics := []string{}
-	uniqueTopics := []string{}
-	keys := map[string]bool{}
+	topicCounts := map[string]int{}
 
 	s.DB.All(&stars)
 
 	for _, star := range stars {
-		allTopics = append(allTopics, star.Topics...)
+		for _, topic := range star.Topics {
+			topicCounts[topic]++
+		}
 	}
 
-	for _, topic := range allTopics {
-		if _, value := keys[topic]; !value {
-			keys[topic] = true
-			uniqueTopics = append(uniqueTopics, topic)
-		}
+	results := []KV{}
+
+	for topic, count := range topicCounts {
+		results = append(results, KV{topic, count})
 	}
 
-	sort.Slice(uniqueTopics, func(i, j int) bool {
-		return uniqueTopics[i] < uniqueTopics[j]
+	sort.Slice(results, func(i, j int) bool {
+		return results[i].Value > results[j].Value
 	})
 
-	return uniqueTopics
+	return results
 }
 
 // GetRandomProjects returns random projects given a project count to return, and an optional