feat: add method to fetch response from medium API

Signed-off-by: Sphericalkat <amolele@gmail.com>

pkg/client/medium_client.go

@@ -0,0 +1,92 @@
+package client
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"strings"
+
+	"github.com/medium.rip/pkg/entities"
+)
+
+func PostData(postId string) (*entities.MediumResponse, error) {
+	// http client to post data
+	url := "https://medium.com/_/graphql"
+	method := "POST"
+
+	payload := strings.NewReader(fmt.Sprintf(`query {
+        post(id: "%s") {
+          title
+          createdAt
+          creator {
+            id
+            name
+          }
+          content {
+            bodyModel {
+              paragraphs {
+                name
+                text
+                type
+                href
+                layout
+                markups {
+                  title
+                  type
+                  href
+                  userId
+                  start
+                  end
+                  anchorType
+                }
+                iframe {
+                  mediaResource {
+                    href
+                    iframeSrc
+                    iframeWidth
+                    iframeHeight
+                  }
+                }
+                metadata {
+                  id
+                  originalWidth
+                  originalHeight
+                }
+              }
+            }
+          }
+        }
+      }`, postId))
+
+	client := &http.Client{}
+	req, err := http.NewRequest(method, url, payload)
+	if err != nil {
+		log.Printf("Error constructing request %v\n", err)
+		return nil, err
+	}
+
+	req.Header.Add("Content-Type", "application/json")
+
+	res, err := client.Do(req)
+	if err != nil {
+		log.Printf("Error making request to Medium API %v\n", err)
+		return nil, err
+	}
+
+	defer res.Body.Close()
+
+	body, err := io.ReadAll(res.Body)
+	if err != nil {
+		log.Printf("Error reading body from response %v\n", err)
+		return nil, err
+	}
+
+	mr, err := entities.UnmarshalMediumResponse(body)
+	if err != nil {
+		log.Printf("Error unmarshalling body from response %v\n", err)
+		return nil, err
+	}
+	
+	return &mr, nil
+}