feat: implementing some of the undo/redo for wizard steps

everyvoice/wizard/dataset.py

@@ -1,3 +1,4 @@
+import copy
 import glob
 import os
 import random
@@ -55,6 +56,9 @@ def effect(self):
             f"Great! The Configuration Wizard 🧙 finished the configuration for your dataset named '{self.response}'"
         )
 
+    def is_reversible(self):
+        return True
+
 
 class DatasetPermissionStep(Step):
     DEFAULT_NAME = StepNames.dataset_permission_step
@@ -106,6 +110,9 @@ def validate(self, response) -> bool:
             )
         return valid_path and contains_wavs
 
+    def is_reversible(self):
+        return True
+
 
 class SampleRateConfigStep(Step):
     DEFAULT_NAME = StepNames.sample_rate_config_step
@@ -131,6 +138,9 @@ def validate(self, response):
             )
             return False
 
+    def is_reversible(self):
+        return True
+
 
 class FilelistStep(Step):
     DEFAULT_NAME = StepNames.filelist_step
@@ -146,6 +156,9 @@ def sanitize_input(self, response):
     def validate(self, response) -> bool:
         return validate_path(response, is_file=True, exists=True)
 
+    def is_reversible(self):
+        return True
+
 
 class FilelistFormatStep(Step):
     DEFAULT_NAME = StepNames.filelist_format_step
@@ -410,9 +423,19 @@ def effect(self):
         # Rename the filelist header with the standard header name
         if "selected_headers" not in self.state:
             self.state["selected_headers"] = []
+        self.saved_state = {
+            "selected_headers": copy.copy(self.state["selected_headers"]),
+            "filelist_headers": copy.copy(self.state["filelist_headers"]),
+        }
         self.state["selected_headers"].append(self.response)
         self.state["filelist_headers"][self.response] = self.header_name
 
+    def is_reversible(self):
+        return True
+
+    def undo(self):
+        self.state.update(self.saved_state)
+
 
 class LanguageHeaderStep(HeaderStep):
     def effect(self):
@@ -438,6 +461,9 @@ def effect(self):
             )
         )
 
+    def is_reversible(self):
+        return False
+
 
 class HasHeaderLineStep(Step):
     """Check if the data set has a header line, and insert one if not.
@@ -557,6 +583,9 @@ def effect(self):
             f"Great! '{self.response}' will be used as the speaker ID for this dataset."
         )
 
+    def is_reversible(self):
+        return True
+
 
 class HasLanguageStep(Step):
     DEFAULT_NAME = StepNames.data_has_language_value_step