Ability to limit history number of snapshots by count or by age

changedetectionio/forms.py

@@ -588,6 +588,8 @@ class globalSettingsApplicationForm(commonSettingsForm):
     global_ignore_text = StringListField('Ignore Text', [ValidateListRegex()])
     global_subtractive_selectors = StringListField('Remove elements', [ValidateCSSJSONXPATHInput(allow_json=False)])
     ignore_whitespace = BooleanField('Ignore whitespace')
+    keep_history_n = IntegerField('Number of snapshots to keep in history for each watch')
+    keep_history_seconds = IntegerField('Number of snapshots to keep - maximum age (todo/seconds)')
     password = SaltyPasswordField()
     pager_size = IntegerField('Pager size',
                               render_kw={"style": "width: 5em;"},

changedetectionio/model/App.py

@@ -40,6 +40,8 @@ class model(dict):
                     'global_ignore_text': [], # List of text to ignore when calculating the comparison checksum
                     'global_subtractive_selectors': [],
                     'ignore_whitespace': True,
+                    'keep_history_n': None,  # Number of snapshots to keep
+                    'keep_history_seconds': None,  # Or time ago back to keep
                     'notification_body': default_notification_body,
                     'notification_format': default_notification_format,
                     'notification_title': default_notification_title,

changedetectionio/model/Watch.py

@@ -625,6 +625,9 @@ def _prune_last_fetched_html_snapshots(self):
             if index > 1 and os.path.isfile(filepath):
                 os.remove(filepath)
 
+    def post_process(self):
+
+        x=1
 
     @property
     def get_browsersteps_available_screenshots(self):

changedetectionio/model/__init__.py

@@ -33,6 +33,8 @@ def __init__(self, *arg, **kw):
             'headers': {},  # Extra headers to send
             'ignore_text': [],  # List of text to ignore when calculating the comparison checksum
             'in_stock_only': True,  # Only trigger change on going to instock from out-of-stock
+            'keep_history_n': None, # Number of snapshots to keep
+            'keep_history_seconds': None, # Or time ago back to keep
             'include_filters': [],
             'last_checked': 0,
             'last_error': False,

changedetectionio/templates/settings.html

@@ -129,6 +129,13 @@
                         Note: Simply changing the User-Agent often does not defeat anti-robot technologies, it's important to consider <a href="https://changedetection.io/tutorial/what-are-main-types-anti-robot-mechanisms">all of the ways that the browser is detected</a>.
                     </span>
                 </div>
+                <div class="pure-control-group">
+                    {{ render_field(form.application.form.keep_history_n) }}
+                    <span class="pure-form-message-inline">Blank - keep all</span>
+                    {{ render_field(form.application.form.keep_history_seconds) }}
+                    <span class="pure-form-message-inline">Blank - keep all</span>
+                </div>
+
                 <div class="pure-control-group">
                                         <br>
                     Tip: <a href="https://github.com/dgtlmoon/changedetection.io/wiki/Proxy-configuration#brightdata-proxy-support">Connect using Bright Data and Oxylabs Proxies, find out more here.</a>

changedetectionio/update_worker.py

@@ -568,6 +568,12 @@ def run(self):
                     except Exception as e:
                         pass
 
+                    try:
+                        watch.post_process()
+                    except Exception as e:
+                        logger.critical(e)
+
+
                     self.datastore.update_watch(uuid=uuid, update_obj={'fetch_time': round(time.time() - now, 3),
                                                                        'last_checked': round(time.time()),
                                                                        'check_count': count