feat: replace text/template with templ and refactor code

handlers/annotations.go

@@ -0,0 +1,103 @@
+package handlers
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"regexp"
+	"strings"
+
+	"github.com/gorilla/mux"
+	"github.com/rramiachraf/dumb/data"
+	"github.com/rramiachraf/dumb/views"
+	"github.com/sirupsen/logrus"
+)
+
+func Annotations(l *logrus.Logger) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		id := mux.Vars(r)["id"]
+
+		if data, err := getCache[data.Annotation](id); err == nil {
+
+			response, err := json.Marshal(data)
+
+			if err != nil {
+				l.Errorf("could not marshal json: %s\n", err)
+				w.WriteHeader(http.StatusInternalServerError)
+				views.ErrorPage(500, "something went wrong").Render(context.Background(), w)
+				return
+			}
+			w.Header().Set("content-type", "application/json")
+			_, err = w.Write(response)
+			if err != nil {
+				l.Errorln("Error sending response: ", err)
+			}
+			return
+		}
+
+		url := fmt.Sprintf("https://genius.com/api/referents/%s?text_format=html", id)
+		resp, err := sendRequest(url)
+
+		if err != nil {
+			l.Errorln(err)
+			w.WriteHeader(http.StatusInternalServerError)
+			views.ErrorPage(500, "cannot reach genius servers").Render(context.Background(), w)
+			return
+		}
+
+		defer resp.Body.Close()
+
+		if resp.StatusCode == http.StatusNotFound {
+			w.WriteHeader(http.StatusNotFound)
+			views.ErrorPage(404, "page not found").Render(context.Background(), w)
+			return
+		}
+
+		buf := new(bytes.Buffer)
+		_, err = buf.ReadFrom(resp.Body)
+		if err != nil {
+			l.Errorln("Error paring genius api response", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			views.ErrorPage(500, "something went wrong").Render(context.Background(), w)
+			return
+		}
+
+		var data data.AnnotationsResponse
+		err = json.Unmarshal(buf.Bytes(), &data)
+		if err != nil {
+			l.Errorf("could not unmarshal json: %s\n", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			views.ErrorPage(500, "something went wrong").Render(context.Background(), w)
+			return
+		}
+
+		w.Header().Set("content-type", "application/json")
+		body := data.Response.Referent.Annotations[0].Body
+		body.Html = cleanBody(body.Html)
+		response, err := json.Marshal(body)
+
+		if err != nil {
+			l.Errorf("could not marshal json: %s\n", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			views.ErrorPage(500, "something went wrong").Render(context.Background(), w)
+			return
+		}
+
+		setCache(id, body)
+		_, err = w.Write(response)
+		if err != nil {
+			l.Errorln("Error sending response: ", err)
+		}
+	}
+}
+
+func cleanBody(body string) string {
+	var withCleanedImageLinks = strings.Replace(body, "https://images.rapgenius.com/", "/images/", -1)
+
+	var re = regexp.MustCompile(`https?:\/\/[a-z]*.?genius.com`)
+	var withCleanedLinks = re.ReplaceAllString(withCleanedImageLinks, "")
+
+	return withCleanedLinks
+}