An example script for replacing code in a C# project

csharp-code-replace-eg.py

## // e.g.
## MBOverlay mbOverlay = UIUtil.GetBusyOverlay(AppStrings.LoadRevision);
## --> VML.LoaderViewModel.Add($"DoorSideBar-{AppStrings.LoadRevision}", Models.ActivityType.API, message: AppStrings.LoadRevision, activitySeverity: Models.ActivitySeverity.High);
## mbOverlay.Hide();
## --> VML.LoaderViewModel.Remove($"DoorSideBar-{AppStrings.LoadRevision}");
## // AppStrings.LoadRevision, Properties..., "", messages: List<string>

import os, re

# files = [f for f in os.listdir('.') if os.path.isfile(f)]

path = 'D:\\dev\\MBApp.Wpf'
files = []

def list_files_recursively():
	# r=root, d=directories, f = files
	for r, d, f in os.walk(path):
	    for file in f:
	        if file[-3:] == '.cs':
	            files.append(os.path.join(r, file))

list_files_recursively()

for f in files:
	if f[-3:] == '.cs':
		print(f)

		class_name = None

		with open(f, 'r+') as lines:
			txt = None

			try:
				for l in lines:
					if not class_name and 'class' in l:
						tokens = l.split()
						idx = None
						try:
							idx = tokens.index('class') + 1
							class_name = tokens[idx]
						except ValueError:
							pass

						# print(class_name)
						break
			except UnicodeDecodeError:
				continue

		if not class_name:
			continue

		with open(f, 'r+') as file:
			txt = file.read()
			cases = re.findall(r'\.GetBusyOverlay\(\s*[\"\s\.\w.]*', txt)
			if (len(cases) > 0):
				print('cases = ' + str(cases))
				for c in cases:
					appstr = re.findall(r'\([\"\s\.\w.]*', c)[0].replace('(', '')
					# print(appstr)

					begin_newpart = 'VML.LoaderViewModel.Add($"'
					begin_newpart_closer = 'VML.LoaderViewModel.Remove($"'
					end_newpart = ''
					end_newpart_closer = ''

					if appstr == 'messages':
						begin_newpart = 'messages.ForEach(message => ' + begin_newpart
						begin_newpart_closer = 'messages.ForEach(message => ' + begin_newpart_closer
						end_newpart = end_newpart + ')'
						end_newpart_closer = end_newpart_closer + ')'
						appstr = 'message'

					newpart = begin_newpart + class_name + '-{' + appstr + '}", Models.ActivityType.API, message: ' + appstr + ', activitySeverity: Models.ActivitySeverity.High)' + end_newpart

					case_txt = txt.split(c)[1].split('.GetBusyOverlay')[0]
					closers_count = case_txt.count('mbOverlay.Hide()')

					txt = re.sub(r'((MBOverlay)|(var))\smbOverlay\s\=\sUIUtil\.GetBusyOverlay\(\s*.*\s*\)', newpart, txt, 1)

					for i in range(closers_count):
						close_str = begin_newpart_closer + class_name + '-{' + appstr + '}")' + end_newpart_closer
						txt = re.sub(r'mbOverlay\.Hide\(\)', close_str, txt, 1)

				with open(f, 'w+') as writefile:
					writefile.write(txt)