Added --no-replace command for special phrases importation and added corresponding...

[nominatim.git] / nominatim / tools / special_phrases / sp_importer.py

diff --git a/nominatim/tools/special_phrases/sp_importer.py b/nominatim/tools/special_phrases/sp_importer.py
index 1b42cb003dd08bea611d34620b85aa04ea85de75..ef4e85bdf1d62161a20de21547e536711c326c2f 100644 (file)
--- a/nominatim/tools/special_phrases/sp_importer.py
+++ b/nominatim/tools/special_phrases/sp_importer.py
@@ -23,9 +23,9 @@ LOG = logging.getLogger()
 class SPImporter():
     # pylint: disable-msg=too-many-instance-attributes
     """
-        Class handling the process of special phrases importations into the database.
+        Class handling the process of special phrases importation into the database.
 
-        Take a SPLoader which load the phrases from an external source.
+        Take a sp loader which load the phrases from an external source.
     """
     def __init__(self, config, phplib_dir, db_connection, sp_loader) -> None:
         self.config = config
@@ -42,10 +42,14 @@ class SPImporter():
         #special phrases class/type on the wiki.
         self.table_phrases_to_delete = set()
 
-    def import_phrases(self, tokenizer):
+    def import_phrases(self, tokenizer, should_replace):
         """
-            Iterate through all specified languages and
-            extract corresponding special phrases from the wiki.
+            Iterate through all SpecialPhrases extracted from the
+            loader and import them into the database.
+
+            If should_replace is set to True only the loaded phrases
+            will be kept into the database. All other phrases already
+            in the database will be removed.
         """
         LOG.warning('Special phrases importation starting')
         self._fetch_existing_place_classtype_tables()
@@ -60,11 +64,12 @@ class SPImporter():
                     class_type_pairs.update(result)
 
         self._create_place_classtype_table_and_indexes(class_type_pairs)
-        self._remove_non_existent_tables_from_db()
+        if should_replace:
+            self._remove_non_existent_tables_from_db()
         self.db_connection.commit()
 
         with tokenizer.name_analyzer() as analyzer:
-            analyzer.update_special_phrases(self.word_phrases)
+            analyzer.update_special_phrases(self.word_phrases, should_replace)
 
         LOG.warning('Import done.')
         self.statistics_handler.notify_import_done()
@@ -121,16 +126,14 @@ class SPImporter():
         """
 
         #blacklisting: disallow certain class/type combinations
-        if (
-            phrase.p_class in self.black_list.keys() and
-            phrase.p_type in self.black_list[phrase.p_class]
-        ): return None
+        if phrase.p_class in self.black_list.keys() \
+           and phrase.p_type in self.black_list[phrase.p_class]:
+            return None
 
         #whitelisting: if class is in whitelist, allow only tags in the list
-        if (
-            phrase.p_class in self.white_list.keys() and
-            phrase.p_type not in self.white_list[phrase.p_class]
-        ): return None
+        if phrase.p_class in self.white_list.keys() \
+           and phrase.p_type not in self.white_list[phrase.p_class]:
+            return None
 
         #sanity check, in case somebody added garbage in the wiki
         if not self._check_sanity(phrase):