fabio / pkpass2png

#!/usr/bin/env bash set -euo pipefail # Usage: # ./pkpass2png <pkpass_path_or_url> [output.png] # # Examples: # ./pkpass2png ticket.pkpass out.png # ./pkpass2png "https://example.com/ticket.pkpass" out.png INPUT="${1:-}" OUT="${2:-ticket.png}" if [[ -z "$INPUT" ]]; then echo "Usage: $0 <pkpass_path_or_url> [output.png]" >&2 exit 2 fi need_cmd() { command -v "$1" >/dev/null 2>&1 || { echo "Missing dependency: $1" >&2 exit 2 } } need_cmd jq need_cmd zint need_cmd magick need_cmd unzip # Pick a downloader if needed is_url=0 if [[ "$INPUT" =~ ^https?:// ]]; then is_url=1 if command -v curl >/dev/null 2>&1; then DL='curl -L --fail --silent --show-error' elif command -v wget >/dev/null 2>&1; then DL='wget -qO-' else echo "Need curl or wget to download URLs" >&2 exit 2 fi fi tmp=$(mktemp -d) trap 'rm -rf "$tmp"' EXIT PKPASS_FILE="$tmp/pass.pkpass" EXTRACT_DIR="$tmp/extracted" mkdir -p "$EXTRACT_DIR" # ---- Acquire pkpass (download or copy) ---- if [[ "$is_url" -eq 1 ]]; then # download to file if [[ "$DL" == curl* ]]; then $DL "$INPUT" -o "$PKPASS_FILE" else $DL "$INPUT" > "$PKPASS_FILE" fi else # local file if [[ ! -f "$INPUT" ]]; then echo "Input file not found: $INPUT" >&2 exit 2 fi cp -f "$INPUT" "$PKPASS_FILE" fi # ---- Extract pkpass (zip) ---- unzip -q "$PKPASS_FILE" -d "$EXTRACT_DIR" PASS_JSON="$EXTRACT_DIR/pass.json" if [[ ! -f "$PASS_JSON" ]]; then echo "pass.json not found inside pkpass" >&2 exit 2 fi # Choose base image: prefer strip.png if present, else background.png if [[ -f "$EXTRACT_DIR/strip.png" ]]; then BASE_IMG="$EXTRACT_DIR/strip.png" elif [[ -f "$EXTRACT_DIR/background.png" ]]; then BASE_IMG="$EXTRACT_DIR/background.png" else echo "Neither strip.png nor background.png found in pkpass" >&2 exit 2 fi # Work files MSG_FILE="$tmp/msg.txt" BARCODE_RAW="$tmp/barcode_raw.png" BARCODE_CARD="$tmp/barcode_card.png" font="DejaVu-Sans" # Find largest pointsize <= max_pt that fits within max_width pixels fit_pt() { local text="$1" max_width="$2" max_pt="$3" font="$4" local pt w for ((pt=max_pt; pt>=9; pt--)); do w=$(magick -font "$font" -pointsize "$pt" \ -background none label:"$text" -format '%w' info:) if [ "$w" -le "$max_width" ]; then echo "$pt" return fi done echo 9 } # ---- Extract fields ---- org=$(jq -r '.organizationName // ""' "$PASS_JSON") logoText=$(jq -r '.logoText // empty' "$PASS_JSON") date=$(jq -r '.eventTicket.headerFields[]? | select(.key=="date") | .value' "$PASS_JSON" | head -n1) event=$(jq -r '.eventTicket.primaryFields[]? | select(.key=="event") | .value' "$PASS_JSON" | head -n1) loc_label=$(jq -r '.eventTicket.secondaryFields[]? | select(.key=="location") | .label' "$PASS_JSON" | head -n1) loc_value=$(jq -r '.eventTicket.secondaryFields[]? | select(.key=="location") | .value' "$PASS_JSON" | head -n1) seat_label=$(jq -r '.eventTicket.secondaryFields[]? | select(.key=="seat") | .label' "$PASS_JSON" | head -n1) seat_value=$(jq -r '.eventTicket.secondaryFields[]? | select(.key=="seat") | .value' "$PASS_JSON" | head -n1) price_label=$(jq -r '.eventTicket.auxiliaryFields[]? | select(.key=="price") | .label' "$PASS_JSON" | head -n1) price_value=$(jq -r '.eventTicket.auxiliaryFields[]? | select(.key=="price") | .value' "$PASS_JSON" | head -n1) alt_text=$(jq -r '.barcode.altText // ""' "$PASS_JSON") fg=$(jq -r '.foregroundColor // "rgb(255,255,255)"' "$PASS_JSON") label=$(jq -r '.labelColor // "rgb(200,200,200)"' "$PASS_JSON") # ---- Canvas size ---- W=$(magick identify -format '%w' "$BASE_IMG") # [1] H=$(magick identify -format '%h' "$BASE_IMG") # [1] # ---- Proportional layout constants ---- # Margins/padding (percentages tuned to your 360x440 case) M=$(( W * 4 / 100 )) # ~4% of width (360 -> 14) [ "$M" -lt 10 ] && M=10 TOP=$(( H * 3 / 100 )) # ~3% of height (440 -> 13) COL_GAP=$(( W * 4 / 100 )) # ~4% of width [ "$COL_GAP" -lt 10 ] && COL_GAP=10 COL_W=$(((W - 2*M - COL_GAP)/2)) # Barcode sizing derived from width BC_SIZE=$(( W * 52 / 100 )) # 360 -> 187 [ "$BC_SIZE" -lt 150 ] && BC_SIZE=150 # keep scannable BOTTOM_MARGIN=$(( H * 4 / 100 )) # 440 -> 17 [ "$BOTTOM_MARGIN" -lt 10 ] && BOTTOM_MARGIN=10 BAR_GAP=$(( H * 3 / 100 )) # 440 -> 13 [ "$BAR_GAP" -lt 10 ] && BAR_GAP=10 # Font maxima (scale with height) org_max=$(( H * 4 / 100 )) # 440 -> 17 date_max=$(( H * 3 / 100 )) # 440 -> 13 event_max=$(( H * 5 / 100 )) # 440 -> 22 val_max=$(( H * 4 / 100 )) # 440 -> 17 [ "$org_max" -lt 12 ] && org_max=12 [ "$date_max" -lt 11 ] && date_max=11 [ "$event_max" -lt 14 ] && event_max=14 [ "$val_max" -lt 12 ] && val_max=12 label_pt=$(( H * 3 / 100 )) # 440 -> 13 [ "$label_pt" -lt 11 ] && label_pt=11 # Vertical gaps (scale with height) gap1=$(( H * 7 / 100 )) # 440 -> 30 gap2=$(( H * 7 / 100 )) # 440 -> 30 gap3=$(( H * 4 / 100 )) # 440 -> 17 gap4=$(( H * 6 / 100 )) # 440 -> 22 gap5=$(( H * 4 / 100 )) # 440 -> 17 # Baseline clamp (prevents top clipping) MIN_Y1=$(( H * 5 / 100 )) # 440 -> 30 [ "$MIN_Y1" -lt 18 ] && MIN_Y1=18 # ---- Barcode (Aztec) ---- jq -r '.barcode.message' "$PASS_JSON" | iconv -f UTF-8 -t ISO-8859-1 > "$MSG_FILE" zint --barcode=92 --scale=5 --border=1 -o "$BARCODE_RAW" -i "$MSG_FILE" # [1] magick "$BARCODE_RAW" \ -resize "${BC_SIZE}x${BC_SIZE}" \ -background white -gravity south -splice 0x$((H*5/100)) \ -fill black -font "$font" -pointsize $((H*3/100)) \ -annotate +0+0 "$alt_text" \ -bordercolor white -border $((W*3/100)) \ "$BARCODE_CARD" # [1] BAR_H=$(magick identify -format '%h' "$BARCODE_CARD") # [1] TEXT_H=$(( H - BAR_H - BOTTOM_MARGIN - BAR_GAP )) # [1] # ---- Auto-fit point sizes ---- # Leave room for date on the right: reserve ~40% width for it org_pt=$(fit_pt "${logoText:-$org}" $((W - 2*M - (W*40/100))) "$org_max" "$font") # [1] date_pt=$(fit_pt "$date" $((W - 2*M)) "$date_max" "$font") # [1] event_pt=$(fit_pt "$event" $((W - 2*M)) "$event_max" "$font") # [1] loc_val_pt=$(fit_pt "$loc_value" "$COL_W" "$val_max" "$font") # [1] seat_val_pt=$(fit_pt "$seat_value" "$COL_W" "$val_max" "$font") # [1] price_val_pt=$(fit_pt "$price_value" $((W - 2*M)) "$val_max" "$font") # [1] # ---- Y positions ---- y1=$((TOP + (H*6/100))) # org/date baseline y2=$((y1 + gap1)) # event y3=$((y2 + gap2)) # secondary labels y4=$((y3 + gap3)) # secondary values y5=$((y4 + gap4)) # price label y6=$((y5 + gap5)) # price value # Shift up if we collide with barcode reserved area (conservative) max_y=$((y6 + (H*7/100))) if [ "$max_y" -ge "$TEXT_H" ]; then shift=$((max_y - TEXT_H + (H*1/100))) y1=$((y1 - shift)) y2=$((y2 - shift)) y3=$((y3 - shift)) y4=$((y4 - shift)) y5=$((y5 - shift)) y6=$((y6 - shift)) fi # Clamp top baseline so first line doesn't clip if [ "$y1" -lt "$MIN_Y1" ]; then d=$((MIN_Y1 - y1)) y1=$((y1 + d)) y2=$((y2 + d)) y3=$((y3 + d)) y4=$((y4 + d)) y5=$((y5 + d)) y6=$((y6 + d)) fi # ---- Compose ---- magick "$BASE_IMG" \ -font "$font" \ \ -gravity northwest \ -fill "$fg" -pointsize "$org_pt" \ -annotate +$M+$y1 "${logoText:-$org}" \ \ -gravity northeast \ -fill "$fg" -pointsize "$date_pt" \ -annotate +$M+$y1 "$date" \ \ -gravity northwest \ -fill "$fg" -pointsize "$event_pt" \ -annotate +$M+$y2 "$event" \ \ -fill "$fg" -pointsize "$label_pt" \ -annotate +$M+$y3 "$loc_label" \ \ -gravity northeast \ -fill "$fg" -pointsize "$label_pt" \ -annotate +$M+$y3 "$seat_label" \ \ -gravity northwest \ -fill "$label" -pointsize "$loc_val_pt" \ -annotate +$M+$y4 "$loc_value" \ \ -gravity northeast \ -fill "$label" -pointsize "$seat_val_pt" \ -annotate +$M+$y4 "$seat_value" \ \ -gravity northwest \ -fill "$fg" -pointsize "$label_pt" \ -annotate +$M+$y5 "$price_label" \ \ -fill "$label" -pointsize "$price_val_pt" \ -annotate +$M+$y6 "$price_value" \ \ \( "$BARCODE_CARD" \) \ -gravity south -geometry +0+$BOTTOM_MARGIN -composite \ \ "$OUT"