Add a script for generating preview images

content/photography/2017-06-21-old-quebec.md

@@ -2,7 +2,7 @@
 title: Old Quebec
 date: 2017-06-21
 extra:
-    cover_image: /photos/2017-06-21-old-quebec.jpeg
+    cover_image: /photos/2017-06-21-old-quebec.preview.jpeg
 ---
 
 ![Old Quebec](/photos/2017-06-21-old-quebec.jpeg)

content/photography/2017-06-21-stormy-quebec-street.md

@@ -2,7 +2,7 @@
 title: Stormy Street in Quebec
 date: 2017-06-21
 extra:
-    cover_image: /photos/2017-06-21-stormy-quebec-street.jpeg
+    cover_image: /photos/2017-06-21-stormy-quebec-street.preview.jpeg
 ---
 
 ![Stormy Street in Quebec](/photos/2017-06-21-stormy-quebec-street.jpeg)

content/photography/2017-06-22-montmorency-falls.md

@@ -2,7 +2,7 @@
 title: Montmorency Falls
 date: 2017-06-22
 extra:
-    cover_image: /photos/2017-06-22-montmorency-falls.jpeg
+    cover_image: /photos/2017-06-22-montmorency-falls.preview.jpeg
 ---
 
 ![Montmorency Falls](/photos/2017-06-22-montmorency-falls.jpeg)

content/photography/2017-08-04-rocky-shore-halifax.md

@@ -2,7 +2,7 @@
 title: Rocky Shore
 date: 2017-08-04
 extra:
-    cover_image: /photos/2017-08-04-rocky-shore-halifax.jpeg
+    cover_image: /photos/2017-08-04-rocky-shore-halifax.preview.jpeg
 ---
 
 ![Rocky Shore](/photos/2017-08-04-rocky-shore-halifax.jpeg)

content/photography/2019-08-04-halifax-port.md

@@ -2,7 +2,7 @@
 title: Halifax Port
 date: 2019-08-04
 extra:
-    cover_image: /photos/2019-08-04-halifax-port.jpeg
+    cover_image: /photos/2019-08-04-halifax-port.preview.jpeg
 ---
 
 ![Halifax Port](/photos/2019-08-04-halifax-port.jpeg)

content/photography/2019-08-09-jacobs-ladder.md

@@ -2,7 +2,7 @@
 title: Jacob's Ladder
 date: 2019-08-09
 extra:
-    cover_image: /photos/2019-08-09-jacobs-ladder.jpeg
+    cover_image: /photos/2019-08-09-jacobs-ladder.preview.jpeg
 ---
 
 ![Jacob's Ladder](/photos/2019-08-09-jacobs-ladder.jpeg)

content/photography/2020-07-19-my-desk.md

@@ -2,7 +2,7 @@
 title: My Desk
 date: 2020-07-19
 extra:
-    cover_image: /photos/2020-07-19-my-desk.png
+    cover_image: /photos/2020-07-19-my-desk.preview.png
 ---
 
-![My Desk](/photos/2020-07-19-my-desk.png)
+![My Desk](/photos/2020-07-19-my-desk.png)

content/photography/2020-07-23-two-cars.md

@@ -2,7 +2,7 @@
 title: Two Cars
 date: 2020-07-23
 extra:
-    cover_image: /photos/2020-07-23-two-cars.png
+    cover_image: /photos/2020-07-23-two-cars.preview.png
 ---
 
 ![Two Cars](/photos/2020-07-23-two-cars.png)

content/photography/2022-01-18-snow-day-in-space.md

@@ -2,7 +2,7 @@
 title: Snow Day in Space
 date: 2022-01-18
 extra:
-    cover_image: /photos/2022-01-18-snow-day-in-space.jpg
+    cover_image: /photos/2022-01-18-snow-day-in-space.preview.jpg
 ---
 
 ![Snow Day in Space](/photos/2022-01-18-snow-day-in-space.jpg)

static/photos/generate_previews.sh

@@ -0,0 +1,45 @@
+#! /bin/bash
+set -ex
+
+# Check if ImageMagick is installed
+if ! command -v convert &> /dev/null; then
+    echo "ImageMagick is not installed. Please install it before running this script."
+    exit 1
+fi
+
+
+# Get the directory of this script
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+# Find all images with extension ".png", ".jpg", or ".jpeg"
+# NOTE: Ignore any image containing ".preview." in the name
+IMAGES=$(find $DIR -type f -name "*.png" -o -name "*.jpg" -o -name "*.jpeg" | grep -v ".preview.")
+
+# Loop through all images
+for IMAGE in $IMAGES; do
+    # Create the preview file name (file.preview.ext)
+    PREVIEW="${IMAGE%.*}.preview.${IMAGE##*.}"
+    
+    # If the file already exists, skip it
+    if [ -f "$PREVIEW" ]; then
+        echo "Preview already exists for: $IMAGE"
+        continue
+    fi
+    
+    # Check if the image is bigger than 1440x1440
+    WIDTH=$(identify -format "%w" $IMAGE)
+    HEIGHT=$(identify -format "%h" $IMAGE)
+    
+    if [ $WIDTH -gt 1440 ] || [ $HEIGHT -gt 1440 ]; then
+        # Create the preview. This should be a 2 fifths resolution version of the original image
+        convert $IMAGE -resize 40% $PREVIEW
+    elif [ $WIDTH -gt 720 ] || [ $HEIGHT -gt 720 ]; then
+        # Create the preview. This should be a half resolution version of the original image
+        convert $IMAGE -resize 50% $PREVIEW
+    else
+        # Create the preview. This should be the original image
+        cp $IMAGE $PREVIEW
+    fi
+    
+    echo "Created preview for: $IMAGE"
+done

templates/photo-timeline.html

@@ -16,6 +16,7 @@
     </div>
 </a>
 <br>
+<br>
 
 {% endif %}
 {% endfor %}