first commit

helpers/postHelpers.go

@@ -0,0 +1,43 @@
+package helpers
+
+import (
+	"CatsOfMastodonBotGo/models"
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"strings"
+)
+
+func GetPosts(ctx context.Context, tag string, instance string) (error, []models.Post) {
+	var requestUrl = instance + "/api/v1/timelines/tag/" + tag + "?limit=40"
+	req, err := http.NewRequestWithContext(ctx, "GET", requestUrl, nil)
+	if err != nil {
+		log.Fatal(err)
+		return err, nil
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		log.Fatal(err)
+		return err, nil
+	}
+	if resp.StatusCode != 200 || strings.Split(strings.ToLower(resp.Header.Get("Content-Type")), ";")[0] != "application/json" {
+		log.Fatal("Status code:", resp.StatusCode, " Content-Type:", resp.Header.Get("Content-Type"))
+		return err, nil
+	}
+
+	var posts []models.Post = nil
+	err = json.NewDecoder(resp.Body).Decode(&posts)
+	if err != nil {
+		log.Fatal(err)
+		return err, nil
+	}
+	// defer: it basically means "do this later when the function returns"
+	defer resp.Body.Close()
+	if posts == nil {
+		return fmt.Errorf("no posts found for tag %s on instance %s", tag, instance), nil
+	}
+	return nil, posts
+}