Added the pending image data file

cmd/fetch-header-image/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"bytes"
+	"encoding/json"
 	"flag"
 	"io"
 	"log"
@@ -13,12 +14,53 @@ import (
 )
 
 func main() {
+	headerImages := flag.String("i", "data/pending-header-images.json", "header images json file")
+	currentPendingImage := flag.String("ip", "", "current pending image")
 	targetFile := flag.String("o", "out.jpg", "target file")
+	odFile := flag.String("od", "out-data.json", "target file data")
 	flag.Parse()
 
-	var bfr bytes.Buffer
+	pis, err := LoadPendingImages(*headerImages)
+	if err != nil {
+		log.Fatal(err)
+	}
 
-	if err := fetchHeaderImage(&bfr, "https://lmika.org/uploads/2025/pxl-20251120-083552448.jpg"); err != nil {
+	pi, ok := pis.FindPendingImage()
+	if !ok {
+		log.Println("no pending image found")
+		return
+	}
+	log.Printf("found pending image: %s\n", pi.URL)
+
+	if *currentPendingImage != "" {
+		if cpi, err := LoadPendingImageFromURL(*currentPendingImage); err == nil {
+			if pi.URL == cpi.URL {
+				log.Println("current pending image is already the latest")
+				return
+			}
+		} else {
+			log.Printf("warn: failed to load current pending image: %s\n", err)
+		}
+	}
+
+	if err := fetchHeaderImageFromURL(*targetFile, pi); err != nil {
+		log.Fatal(err)
+	}
+
+	// Write out the current pending image to the data file
+	var dBfr bytes.Buffer
+	if err := json.NewEncoder(&dBfr).Encode(pi); err != nil {
+		log.Fatal(err)
+	}
+
+	if err := os.WriteFile(*odFile, dBfr.Bytes(), 0644); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func fetchHeaderImageFromURL(outFile string, pi PendingImage) error {
+	var bfr bytes.Buffer
+	if err := fetchHeaderImage(&bfr, pi.URL); err != nil {
 		log.Fatal(err)
 	}
 
@@ -29,16 +71,19 @@ func main() {
 
 	rImg := imaging.Resize(img, 1280, 0, imaging.Lanczos)
 
-	// TEMP: crop bottom half
-	rImg = imaging.CropAnchor(rImg, rImg.Bounds().Dx(), rImg.Bounds().Dy()/2, imaging.Bottom)
+	if pi.Crop == CropBottom {
+		rImg = imaging.CropAnchor(rImg, rImg.Bounds().Dx(), rImg.Bounds().Dy()/2, imaging.Bottom)
+	}
 
-	if err := os.MkdirAll(filepath.Dir(*targetFile), 0755); err != nil {
+	if err := os.MkdirAll(filepath.Dir(outFile), 0755); err != nil {
 		log.Fatal(err)
 	}
 
-	if err := imaging.Save(rImg, *targetFile, imaging.JPEGQuality(70)); err != nil {
+	if err := imaging.Save(rImg, outFile, imaging.JPEGQuality(70)); err != nil {
 		log.Fatal(err)
 	}
+
+	return nil
 }
 
 func fetchHeaderImage(w io.Writer, url string) error {