From 063d630bc1acbaaf1b9743a33bef559601b117d3 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Sun, 27 Oct 2024 10:53:32 +0200
Subject: can share an article with preview text of the title

---
 go.mod                                  |  3 ++-
 go.sum                                  |  4 +++
 internal/platforms/linkedin/escapes.go  | 48 +++++++++++++++++++++++++++++++++
 internal/platforms/linkedin/linkedin.go | 15 +++++++++--
 4 files changed, 67 insertions(+), 3 deletions(-)

diff --git a/go.mod b/go.mod
index 563eb4f..1b14607 100644
--- a/go.mod
+++ b/go.mod
@@ -11,5 +11,6 @@ require (
 	github.com/fatih/color v1.17.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	golang.org/x/sys v0.18.0 // indirect
+	golang.org/x/net v0.30.0 // indirect
+	golang.org/x/sys v0.26.0 // indirect
 )
diff --git a/go.sum b/go.sum
index 9f05b15..5f0b1c1 100644
--- a/go.sum
+++ b/go.sum
@@ -11,9 +11,13 @@ github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWE
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561 h1:MDc5xs78ZrZr3HMQugiXOAkSZtfTpbJLDr/lwfgO53E=
 golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561/go.mod h1:cyybsKvd6eL0RnXn6p/Grxp8F5bW7iYuBgsNCOHpMYE=
+golang.org/x/net v0.30.0 h1:AcW1SDZMkb8IpzCdQUaIq2sP4sZ4zw+55h6ynffypl4=
+golang.org/x/net v0.30.0/go.mod h1:2wGyMJ5iFasEhkwi13ChkO/t1ECNC4X4eBKkVFyYFlU=
 golang.org/x/oauth2 v0.23.0 h1:PbgcYx2W7i4LvjJWEbf0ngHV6qJYr86PkAV3bXdLEbs=
 golang.org/x/oauth2 v0.23.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
 golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
+golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
diff --git a/internal/platforms/linkedin/escapes.go b/internal/platforms/linkedin/escapes.go
index 5f803a5..6c18a76 100644
--- a/internal/platforms/linkedin/escapes.go
+++ b/internal/platforms/linkedin/escapes.go
@@ -1,7 +1,11 @@
 package linkedin
 
 import (
+	"fmt"
+	"net/http"
 	"strings"
+
+	"golang.org/x/net/html"
 )
 
 // https://learn.microsoft.com/en-us/linkedin/marketing/community-management/shares/little-text-format?view=li-lms-2024-01#language-grammar
@@ -37,3 +41,47 @@ func escapeLinkedInText(input string) string {
 
 	return builder.String()
 }
+
+// fetchTitle fetches the HTML page at the given URL and returns the content of the <title> tag.
+func fetchTitle(url string) (string, error) {
+	// Send a GET request to the URL
+	resp, err := http.Get(url)
+	if err != nil {
+		return "", fmt.Errorf("failed to get URL: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("failed to get a successful response: %v", resp.StatusCode)
+	}
+
+	// Parse the HTML document
+	doc, err := html.Parse(resp.Body)
+	if err != nil {
+		return "", fmt.Errorf("failed to parse HTML: %v", err)
+	}
+
+	// Traverse the document and find the <title> tag
+	var title string
+	var f func(*html.Node)
+	f = func(n *html.Node) {
+		if n.Type == html.ElementNode && n.Data == "title" {
+			if n.FirstChild != nil {
+				title = n.FirstChild.Data
+			}
+			return
+		}
+		for c := n.FirstChild; c != nil; c = c.NextSibling {
+			f(c)
+		}
+	}
+
+	// Call the function to search for the title
+	f(doc)
+
+	if title == "" {
+		return "", fmt.Errorf("no title element found")
+	}
+
+	return title, nil
+}
diff --git a/internal/platforms/linkedin/linkedin.go b/internal/platforms/linkedin/linkedin.go
index ebd92b0..54752b9 100644
--- a/internal/platforms/linkedin/linkedin.go
+++ b/internal/platforms/linkedin/linkedin.go
@@ -57,7 +57,7 @@ func post(ctx context.Context, args config.Args, sizeLimit int, ent entry.Entry)
 }
 
 func callLinkedInAPI(ctx context.Context, personID, accessToken, content string, urls []string) error {
-	const url = "https://api.linkedin.com/v2/posts"
+	const url = "https://api.linkedin.com/rest/posts"
 
 	post := map[string]interface{}{
 		"author":     fmt.Sprintf("urn:li:person:%s", personID),
@@ -73,10 +73,20 @@ func callLinkedInAPI(ctx context.Context, personID, accessToken, content string,
 	}
 
 	if len(urls) > 0 {
-		// TODO: Add media links to post structure
+		title, err := fetchTitle(urls[0])
+		if err != nil {
+			return err
+		}
+		post["content"] = map[string]interface{}{
+			"article": map[string]interface{}{
+				"title":  title,
+				"source": urls[0],
+			},
+		}
 	}
 
 	payload, err := json.Marshal(post)
+	fmt.Println(string(payload))
 	if err != nil {
 		return fmt.Errorf("Error encoding JSON:%w", err)
 	}
@@ -88,6 +98,7 @@ func callLinkedInAPI(ctx context.Context, personID, accessToken, content string,
 	req.Header.Add("Authorization", "Bearer "+accessToken)
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Add("X-RestLi-Protocol-Version", "2.0.0")
+	req.Header.Add("LinkedIn-Version", "202409")
 
 	client := &http.Client{}
 	resp, err := client.Do(req)
-- 
cgit v1.2.3