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#!/bin/bash

# Replay a jcode recording as video

#

# This script:

# 1. Starts a fresh jcode instance in a new terminal

# 2. Records the screen with wf-recorder

# 3. Replays the recorded keystrokes with proper timing

# 4. Outputs a video file

#

# Usage: ./replay_recording.sh <recording.json> [output.mp4]

set -e

RECORDING_FILE="${1:?Usage: $0 <recording.json> [output.mp4]}"

OUTPUT_FILE="${2:-${RECORDING_FILE%.json}.mp4}"

SCRIPT_DIR="$(dirname "$0")"

if [ ! -f "$RECORDING_FILE" ]; then

echo "Error: Recording file not found: $RECORDING_FILE"

exit 1

fi

echo "🎬 jcode Recording Replay"

echo " Input: $RECORDING_FILE"

echo " Output: $OUTPUT_FILE"

echo ""

# Parse the recording and generate wtype commands

generate_wtype_script() {

python3 << 'PYTHON' "$RECORDING_FILE"

import json

import sys

with open(sys.argv[1]) as f:

events = json.load(f)

prev_time = 0

for event in events:

offset = event.get('offset_ms', 0)

delay = offset - prev_time

prev_time = offset

if delay > 0:

# Sleep for the delay (in seconds)

print(f"sleep {delay / 1000:.3f}")

evt = event.get('event', {})

evt_type = evt.get('type')

if evt_type == 'Key':

data = evt.get('data', {})

code = data.get('code', '')

mods = data.get('modifiers', [])

# Convert code to wtype format

key = None

if code.startswith('Char('):

# Extract character: Char('a') -> a

char = code[6:-2] if len(code) > 7 else code[6:-1]

key = char

elif code == 'Enter':

key = 'Return'

elif code == 'Backspace':

key = 'BackSpace'

elif code == 'Tab':

key = 'Tab'

elif code == 'Esc':

key = 'Escape'

elif code == 'Up':

key = 'Up'

elif code == 'Down':

key = 'Down'

elif code == 'Left':

key = 'Left'

elif code == 'Right':

key = 'Right'

elif code == 'Home':

key = 'Home'

elif code == 'End':

key = 'End'

elif code == 'PageUp':

key = 'Page_Up'

elif code == 'PageDown':

key = 'Page_Down'

elif code == 'Delete':

key = 'Delete'

elif code == 'Insert':

key = 'Insert'

elif code.startswith('F') and code[1:].isdigit():

key = code # F1, F2, etc.

else:

# Unknown key, skip

continue

if key:

cmd = 'wtype'

for mod in mods:

if mod == 'ctrl':

cmd += ' -M ctrl'

elif mod == 'alt':

cmd += ' -M alt'

elif mod == 'shift':

cmd += ' -M shift'

if len(key) == 1 and key.isalnum():

cmd += f' "{key}"'

else:

cmd += f' -k {key}'

# Release modifiers

for mod in reversed(mods):

if mod == 'ctrl':

cmd += ' -m ctrl'

elif mod == 'alt':

cmd += ' -m alt'

elif mod == 'shift':

cmd += ' -m shift'

print(cmd)

PYTHON

}

# Get the screen geometry for recording

GEOMETRY=$(niri msg focused-output 2>/dev/null | grep -oP 'Mode: \K\d+x\d+' | head -1 || echo "1920x1080")

echo "📹 Starting screen recording..."

echo " Geometry: $GEOMETRY"

echo ""

# Start wf-recorder in background

wf-recorder -g "0,0 $GEOMETRY" -f "$OUTPUT_FILE" &

RECORDER_PID=$!

sleep 1 # Let recorder initialize

# Start jcode in a new kitty window

echo "🚀 Starting jcode..."

kitty --title "jcode-replay" -e bash -c "cd $(pwd) && ~/.cargo/bin/jcode; read -p 'Press Enter to close...'" &

KITTY_PID=$!

sleep 2 # Wait for jcode to start

# Focus the new window

sleep 0.5

# Find and focus the jcode-replay window

WINDOW_ID=$(niri msg windows 2>/dev/null | grep -B5 "jcode-replay" | grep -oP 'Window ID \K\d+' | head -1)

if [ -n "$WINDOW_ID" ]; then

echo " Focusing window $WINDOW_ID"

niri msg action focus-window --id "$WINDOW_ID"

sleep 0.3

fi

echo "⌨️ Replaying keystrokes..."

echo ""

# Generate and execute wtype script

generate_wtype_script | while read -r cmd; do

if [[ "$cmd" == sleep* ]]; then

eval "$cmd"

else

eval "$cmd" 2>/dev/null || true

fi

done

echo ""

echo "⏹️ Stopping recording..."

sleep 1 # Final pause

# Stop recorder

kill $RECORDER_PID 2>/dev/null || true

wait $RECORDER_PID 2>/dev/null || true

# Clean up kitty window

kill $KITTY_PID 2>/dev/null || true

echo ""

echo "✅ Done!"

echo " Video saved to: $OUTPUT_FILE"

ls -lh "$OUTPUT_FILE"