Implement action (#3)

README.md

@@ -22,7 +22,8 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GIPHY_API_KEY: ${{ secrets.GIPHY_API_KEY }}
           GITHUB_REPOSITORY: ${{ github.repository }}
-          GITHUB_COMMENT: ${{ github.event }}
+          GITHUB_COMMENT_BODY: ${{ github.event.comment.body }}
+          GITHUB_ISSUE_NUMBER: ${{ github.event.issue.number }}
         with:
           trigger: 'looks good to me' # default: lgtm
 ```

cmd/action-lgtm-reaction/main.go

@@ -1,10 +1,62 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"os"
+	"strconv"
+	"strings"
+
+	"github.com/micnncim/action-lgtm-reaction/pkg/giphy"
+	"github.com/micnncim/action-lgtm-reaction/pkg/github"
 )
 
 func main() {
-	fmt.Fprintf(os.Stderr, "INPUT_TRIGGER: %s", os.Getenv("INPUT_TRIGGER"))
+	trigger := os.Getenv("INPUT_TRIGGER")
+	givenComment := os.Getenv("GITHUB_COMMENT_BODY")
+	if strings.ToUpper(trigger) != strings.ToUpper(givenComment) {
+		fmt.Fprintf(os.Stderr, "no match issue comment\n")
+		return
+	}
+
+	apiKey := os.Getenv("GIPHY_API_KEY")
+	giphyClient, err := giphy.NewClient(apiKey)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "unable to create giphy client: %v\n", err)
+		os.Exit(1)
+	}
+	giphies, err := giphyClient.Search("lgtm")
+	if err != nil {
+		os.Exit(1)
+	}
+	if len(giphies) == 0 {
+		fmt.Fprintf(os.Stderr, "no giphy contents found\n")
+		os.Exit(1)
+	}
+
+	token := os.Getenv("GITHUB_TOKEN")
+	githubClient, err := github.NewClient(token)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "unable to create github client: %v\n", err)
+		os.Exit(1)
+	}
+
+	repository := os.Getenv("GITHUB_REPOSITORY")
+	slugs := strings.Split(repository, "/")
+	if len(slugs) != 2 {
+		fmt.Fprintf(os.Stderr, "invalid repository: %v\n", repository)
+		os.Exit(1)
+	}
+	owner, repo := slugs[0], slugs[1]
+	issueNumber := os.Getenv("GITHUB_ISSUE_NUMBER")
+	number, err := strconv.Atoi(issueNumber)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "unable to convert string to int in issue number\n")
+		os.Exit(1)
+	}
+	ctx := context.Background()
+	comment := giphies[0].GIFURLInMarkdownStyle()
+	if err := githubClient.CreateIssueComment(ctx, owner, repo, number, comment); err != nil {
+		os.Exit(1)
+	}
 }