Issue 405: add UserSetting for stats sample size.

lute/book/stats.py

@@ -6,6 +6,7 @@
 from lute.read.render.service import get_paragraphs
 from lute.db import db
 from lute.models.book import Book
+from lute.models.setting import UserSetting
 
 # from lute.utils.debug_helpers import DebugTimer
 
@@ -36,7 +37,7 @@ def get_status_distribution(book):
             txindex += 1
 
     # Use a sample of pages to speed up stats count.
-    sample_size = 5
+    sample_size = int(UserSetting.get_value("stats_calc_sample_size") or 5)
     texts = _last_n_pages(book, txindex, sample_size)
 
     # Getting the individual paragraphs per page, and then combining,

lute/models/setting.py

@@ -162,6 +162,7 @@ def load():
             # Behaviour:
             "open_popup_in_new_tab": False,
             "stop_audio_on_term_form_open": True,
+            "stats_calc_sample_size": 5,
         }
         for k, v in keys_and_defaults.items():
             if not UserSetting.key_exists(k):

lute/settings/routes.py

@@ -48,6 +48,13 @@ class UserSettingsForm(FlaskForm):
 
     open_popup_in_new_tab = BooleanField("Open popup in new tab")
     stop_audio_on_term_form_open = BooleanField("Stop audio on term form open")
+    stats_calc_sample_size = IntegerField(
+        "Book stats page sample size",
+        validators=[InputRequired(), NumberRange(min=1, max=200)],
+        render_kw={
+            "title": "Number of pages to use for book stats calculation.  Max 200 for performance."
+        },
+    )
 
     mecab_path = StringField("MECAB_PATH environment variable")
     reading_choices = [

lute/static/css/styles.css

@@ -1774,7 +1774,8 @@ input[type="checkbox"][disabled] + label {
 
 #current_theme, 
 #japanese_reading, 
-#backup_count, 
+#backup_count,
+#stats_calc_sample_size,
 #test_mecab_btn,
 #parser_type,
 #language_id,

lute/templates/settings/form.html

@@ -89,6 +89,7 @@ <h2>Behaviour</h2>
     {% for f in [
     form.open_popup_in_new_tab,
     form.stop_audio_on_term_form_open,
+    form.stats_calc_sample_size,
     ]%}
     <tr>
       <td>{{ f.label }}</td>