Removing trailing spaces.

The conditions used to determine whether or not an image have to be
processed depending on its size were boggus. This commit fixes the
issue, images are now processed as they should.

.gitignore

@@ -1,3 +1,5 @@
 *~
 \#*
 .\#*
+*.swp
+*.vcf

README.md

@@ -0,0 +1,17 @@
+# VCF Compressor
+
+A simple bash script that compress images inside a vCard 3.0.
+
+
+## Requirements
+
+* bash
+* imagemagick
+
+
+## Further reading
+
+* [vCard on Wikipedia](https://en.wikipedia.org/wiki/VCard)
+* vCard 3.0: [RFC 2425](https://tools.ietf.org/html/rfc2425) and [RFC 2426](https://tools.ietf.org/html/rfc2426)
+* vCard 4.0: [RFC 6350](https://tools.ietf.org/html/rfc6350)
+* CardDAV: [RFC 6352](https://tools.ietf.org/html/rfc6352)

vcf_compressor.sh

@@ -29,21 +29,46 @@ usage () {
     echo ""
     echo "Options:"
     echo "  -o, --output"
-    echo "  -v, --verbose"
-    echo "  -V, --version"
+    echo "  --version"
     echo "  -h, --help"
     exit "$exit_status"
 }
 
-echo_verbose () {
-    if [ $verbose -gt 0 ]; then
-        echo "$@"
+raw_img () {
+    line="$1"
+
+    echo "$line" | cut -d ":" -f2 | base64 -d
+}
+
+compress_photo () {
+    line="$1"
+    max_width="300"
+    max_height="300"
+
+    prefix=$(echo "$line" | cut -d ":" -f1)
+    width=$(raw_img "$line" | identify -format '%w' -)
+    height=$(raw_img "$line" | identify -format '%h' -)
+    if [ "$width" -gt "$max_width" ] || [ "$height" -gt "$max_height" ] ; then
+        picture=$(raw_img "$line" | convert "-" -quality 50 -resize "${max_width}x${max_height}>" "-" | base64 -w0)
+        echo "$prefix:$picture"
+    else
+        echo "$line"
+    fi
+}
+
+process_line () {
+    line="$1"
+
+    echo "$line" | egrep "^PHOTO;" | grep ";ENCODING=b;" >/dev/null 2>&1
+    if [ $? -eq 0 ]; then
+        compress_photo "$line"
+    else
+        echo "$line"
     fi
 }
 
 input_file=""
 output_file=""
-verbose=0
 
 while :; do
     test $# -gt 0 || break
@@ -57,11 +82,7 @@ while :; do
                 usage
             fi
             ;;
-        -v|--verbose)
-            verbose=1
-            shift
-            ;;
-        -V|--version)
+        --version)
             version
             ;;
         -h|--help)
@@ -79,12 +100,19 @@ while :; do
     esac
 done
 test -z "$input_file" && usage
+if [ ! -f "$input_file" ]; then
+    echo "$input_file: file not found"
+    exit 1
+fi
 if [ -z "$output_file" ]; then
     dir=$(dirname "$input_file")
     name=$(basename "$input_file" ".vcf")
     output_file="$dir/$name.new.vcf"
 fi
 
-echo "in:  $input_file"
-echo "out: $output_file"
-echo_verbose "verbose mode on"
+echo -n > "$output_file"
+
+while IFS='' read -r line || [[ -n "$line" ]]; do
+    line=$(process_line "$line")
+    echo "$line" >> "$output_file"
+done < "$input_file"