WIP

changedetectionio/forms.py

@@ -519,13 +519,17 @@ class processor_text_json_diff_form(commonSettingsForm):
             result = False
         return result
 
+
 class processor_restock_diff_form(processor_text_json_diff_form):
+    in_stock_only = BooleanField('Only trigger when product goes BACK to in-stock', default=True)
+    price_change_min = FloatField('Minimum amount to trigger notification', [validators.Optional()], render_kw={"placeholder": "No limit", "size": "10"})
+    price_change_max = FloatField('Maximum amount to trigger notification', [validators.Optional()], render_kw={"placeholder": "No limit", "size": "10"})
+    price_change_threshold_percent = FloatField('Threshold in % for price changes', validators=[
+        validators.Optional(),
+        validators.NumberRange(min=0, max=100, message="Should be between 0 and 100"),
+    ], render_kw={"placeholder": "0%", "size": "5"})
 
-    #@todo - add "Any increase" and "Any decrease" options
 
-    in_stock_only = BooleanField('Only trigger when product goes BACK to in-stock', default=True)
-    price_change_min = FloatField('Minimum amount to trigger notification',[validators.Optional()], render_kw={"placeholder": "No limit"} )
-    price_change_max = FloatField('Maximum amount to trigger notification',[validators.Optional()], render_kw={"placeholder": "No limit"} )
     follow_price_changes = BooleanField('Follow price changes', default=False)
 
     def extra_tab_content(self):
@@ -560,6 +564,11 @@ class processor_restock_diff_form(processor_text_json_diff_form):
                     {{ render_field(form.price_change_max) }}
                     <span class="pure-form-message-inline">Maximum amount, only trigger a change when the price is more than this amount.</span>
                 </fieldset>
+                <fieldset class="pure-group price-change-minmax">
+                    {{ render_field(form.price_change_threshold_percent) }}
+                    <span class="pure-form-message-inline">Price must change more than this % to trigger a change.</span><br>
+                    <span class="pure-form-message-inline">For example, If the product is $1,000 USD, <strong>2%</strong> would mean it has to change more than $20 since the last check.</span><br>
+                </fieldset>                
             </div>
         </fieldset>"""
 

changedetectionio/model/__init__.py

@@ -58,6 +58,7 @@ class watch_base(dict):
             'previous_md5': False,
             'previous_md5_before_filters': False,  # Used for skipping changedetection entirely
             'processor': 'text_json_diff',  # could be restock_diff or others from .processors
+            'price_change_threshold_percent': None,
             'proxy': None,  # Preferred proxy connection
             'remote_server_reply': None,  # From 'server' reply header
             'sort_text_alphabetically': False,

changedetectionio/processors/restock_diff.py

@@ -87,6 +87,22 @@ def get_itemprop_availability(html_content) -> Restock:
 
     return Restock(value)
 
+
+def is_between(number, lower=None, upper=None):
+    """
+    Check if a number is between two values.
+
+    Parameters:
+    number (float): The number to check.
+    lower (float or None): The lower bound (inclusive). If None, no lower bound.
+    upper (float or None): The upper bound (inclusive). If None, no upper bound.
+
+    Returns:
+    bool: True if the number is between the lower and upper bounds, False otherwise.
+    """
+    return (lower is None or lower <= number) and (upper is None or number <= upper)
+
+
 class perform_site_check(difference_detection_processor):
     screenshot = None
     xpath_data = None
@@ -161,7 +177,7 @@ class perform_site_check(difference_detection_processor):
                 # All cases
                 changed_detected = True
 
-        if watch.get('follow_price_changes') and watch.get('restock') and update_obj['restock'].get('price'):
+        if watch.get('follow_price_changes') and watch.get('restock') and update_obj.get('restock') and update_obj['restock'].get('price'):
             price = float(update_obj['restock'].get('price'))
             previous_price = float(watch['restock'].get('price'))
 
@@ -170,18 +186,21 @@ class perform_site_check(difference_detection_processor):
                 changed_detected = True
 
             # Minimum/maximum price limit
-            if update_obj.get('restock') and update_obj['restock'].get('price') and watch.get('price_change_min'):
+            if update_obj.get('restock') and update_obj['restock'].get('price'):
                 logger.debug(
                     f"{uuid} - Change was detected, 'price_change_max' is '{watch.get('price_change_max', '')}' 'price_change_min' is '{watch.get('price_change_min', '')}', price from website is '{update_obj['restock'].get('price', '')}'.")
                 if update_obj['restock'].get('price'):
-                    min_limit = float(watch.get('price_change_min', 0))
-                    max_limit = float(watch.get('price_change_max', float('inf')))  # Set to infinity if not provided
+                    min_limit = float(watch.get('price_change_min')) if watch.get('price_change_min') else None
+                    max_limit = float(watch.get('price_change_max')) if watch.get('price_change_max') else None
 
                     price = float(update_obj['restock'].get('price'))
                     logger.debug(f"{uuid} after float conversion - Min limit: '{min_limit}' Max limit: '{max_limit}' Price: '{price}'")
-                    if changed_detected:
-                        if price < max_limit and price > min_limit:
-                            changed_detected = False
+                    if min_limit or max_limit:
+                        if is_between(number=price, lower=min_limit, upper=max_limit):
+                            if changed_detected:
+                                logger.debug(
+                                    f"{uuid} Override change-detected to FALSE because price was inside threshold")
+                                changed_detected = False
 
         # Always record the new checksum
         update_obj["previous_md5"] = fetched_md5

changedetectionio/tests/test_restock_itemprop.py

@@ -80,7 +80,7 @@ def test_restock_itemprop_basic(client, live_server):
         assert b'Deleted' in res.data
 
 def test_itemprop_price_change(client, live_server):
-#    live_server_setup(live_server)
+    #live_server_setup(live_server)
 
     test_url = url_for('test_endpoint', _external=True)
 
@@ -123,10 +123,12 @@ def test_itemprop_price_change(client, live_server):
     res = client.get(url_for("form_delete", uuid="all"), follow_redirects=True)
     assert b'Deleted' in res.data
 
-
 def test_itemprop_price_minmax_limit(client, live_server):
     #live_server_setup(live_server)
 
+    res = client.get(url_for("form_delete", uuid="all"), follow_redirects=True)
+    assert b'Deleted' in res.data
+
     test_url = url_for('test_endpoint', _external=True)
 
     set_original_response(props_markup=instock_props[0], price="950.95")
@@ -184,3 +186,6 @@ def test_itemprop_price_minmax_limit(client, live_server):
     res = client.get(url_for("index"))
     assert b'1890.45' in res.data
     assert b'unviewed' in res.data
+    res = client.get(url_for("form_delete", uuid="all"), follow_redirects=True)
+    assert b'Deleted' in res.data
+

changedetectionio/tests/unit/test_restock_logic.py

@@ -0,0 +1,21 @@
+#!/usr/bin/python3
+
+# run from dir above changedetectionio/ dir
+# python3 -m unittest changedetectionio.tests.unit.test_restock_logic
+
+import unittest
+import os
+
+from changedetectionio.processors import restock_diff
+
+# mostly
+class TestDiffBuilder(unittest.TestCase):
+
+    def test_logic(self):
+        assert restock_diff.is_between(number=10, lower=9, upper=11) == True, "Between 9 and 11"
+        assert restock_diff.is_between(number=10, lower=0, upper=11) == True, "Between 9 and 11"
+        assert restock_diff.is_between(number=10, lower=None, upper=11) == True, "Between None and 11"
+        assert not restock_diff.is_between(number=12, lower=None, upper=11) == True, "12 is not between None and 11"
+
+if __name__ == '__main__':
+    unittest.main()