From 9f7108d22a2e8ca1cca9667624ca3d8eceb0803a Mon Sep 17 00:00:00 2001
From: Alexander Wainwright <code@figtree.dev>
Date: Sat, 31 Jan 2026 10:59:56 +1000
Subject: [PATCH] Add progress bar test tool

---
 demo_progress.py | 100 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100755 demo_progress.py

diff --git a/demo_progress.py b/demo_progress.py
new file mode 100755
index 0000000..1b38dbb
--- /dev/null
+++ b/demo_progress.py
@@ -0,0 +1,100 @@
+#!/usr/bin/env python3
+import time
+import logging
+import argparse
+import random
+from dataclasses import dataclass
+from emulsion.tui import DashboardUI
+
+@dataclass
+class MockTask:
+	original_file: str
+	timestamp: str = "2024-01-01 12:00:00"
+
+class MockRunner:
+	def __init__(self, total_items: int, rate_per_sec: float, fail_rate: float = 0.01):
+		self.total_items = total_items
+		self.rate_per_sec = rate_per_sec
+		self.fail_rate = fail_rate
+		
+		# Generate mock tasks
+		self.tasks = [
+			MockTask(original_file=f"DSC_{i:05d}.JPG") 
+			for i in range(total_items)
+		]
+		
+		self.pending_tasks = list(self.tasks)
+		self.completed_tasks = [] # (Task, success, msg)
+		self.dry_run = False
+		
+		self._start_time = None
+		self._items_processed = 0
+
+	def start(self):
+		self._start_time = time.time()
+
+	def update(self):
+		if not self._start_time:
+			return []
+			
+		elapsed = time.time() - self._start_time
+		target_processed = int(elapsed * self.rate_per_sec)
+		
+		# Clamp to total
+		target_processed = min(target_processed, self.total_items)
+		
+		newly_completed = []
+		
+		while self._items_processed < target_processed:
+			if not self.pending_tasks:
+				break
+				
+			task = self.pending_tasks.pop(0)
+			
+			# Simulate success/failure
+			is_success = random.random() > self.fail_rate
+			msg = "Updated timestamp" if is_success else "Permission denied"
+			
+			result = (task, is_success, msg)
+			self.completed_tasks.append(result)
+			newly_completed.append(result)
+			
+			self._items_processed += 1
+			
+		return newly_completed
+
+	def is_done(self):
+		return self._items_processed >= self.total_items
+
+	@property
+	def progress(self):
+		return self._items_processed, self.total_items
+
+def main():
+	parser = argparse.ArgumentParser(description="Demo the Emulsion Progress Bar")
+	parser.add_argument("-n", "--count", type=int, default=1000, help="Number of items to process")
+	parser.add_argument("-r", "--rate", type=float, default=50.0, help="Items per second")
+	parser.add_argument("-f", "--fail", type=float, default=0.005, help="Failure rate (0.0 to 1.0)")
+	
+	args = parser.parse_args()
+
+	logging.basicConfig(
+		filename='emulsion.log',
+		level=logging.DEBUG,
+		format='%(asctime)s - %(levelname)s - %(message)s'
+	)
+	logging.info('Emulsion started')
+	
+	print(f"Starting demo with {args.count} items at {args.rate}/sec...")
+	time.sleep(1)
+	
+	runner = MockRunner(args.count, args.rate, args.fail)
+	ui = DashboardUI(runner)
+	
+	try:
+		ui.run()
+	except KeyboardInterrupt:
+		print("\nAborted by user.")
+
+if __name__ == "__main__":
+	main()