Build(GHActions): Use `checkout@v4` instead of outdated `v2`

[sqlconvert.git] / sqlconvert / process_tokens.py

diff --git a/sqlconvert/process_tokens.py b/sqlconvert/process_tokens.py
index 0bbf94cb703ecb8963d93eeac147ecff0c19f1d4..886f36d46c02d1f824486593f3263bd06b3cb3b3 100644 (file)
--- a/sqlconvert/process_tokens.py
+++ b/sqlconvert/process_tokens.py
@@ -1,19 +1,43 @@
 
+from sqlparse.sql import Comment
+from sqlobject.converters import sqlrepr
 from sqlparse import parse
-from sqlparse.compat import PY3
-from sqlparse.tokens import Error, Punctuation, Comment, Newline, Whitespace
+from sqlparse import tokens as T
+
+try:
+    xrange
+except NameError:
+    xrange = range
 
 
 def find_error(token_list):
     """Find an error"""
     for token in token_list.flatten():
-        if token.ttype is Error:
+        if token.ttype is T.Error:
             return True
     return False
 
 
-if PY3:
-    xrange = range
+def is_comment_or_space(token):
+    return isinstance(token, Comment) or \
+        token.ttype in (T.Comment, T.Comment.Single, T.Comment.Multiline,
+                        T.Newline, T.Whitespace)
+
+
+def is_newline_statement(statement):
+    for token in statement.tokens[:]:
+        if token.ttype is not T.Newline:
+            return False
+    return True
+
+
+def escape_strings(token_list, dbname):
+    """Escape strings"""
+    for token in token_list.flatten():
+        if token.ttype is T.String.Single:
+            value = token.value[1:-1]  # unquote by removing apostrophes
+            value = sqlrepr(value, dbname)
+            token.normalized = token.value = value
 
 
 class StatementGrouper(object):
@@ -30,13 +54,14 @@ class StatementGrouper(object):
 
     def process_lines(self):
         statements = parse(''.join(self.lines), encoding=self.encoding)
+        if not statements:
+            return
         last_stmt = statements[-1]
         for i in xrange(len(last_stmt.tokens) - 1, 0, -1):
             token = last_stmt.tokens[i]
-            if token.ttype in (Comment.Single, Comment.Multiline,
-                               Newline, Whitespace):
+            if is_comment_or_space(token):
                 continue
-            if token.ttype is Punctuation and token.value == ';':
+            if token.ttype is T.Punctuation and token.value == ';':
                 break  # The last statement is complete
             # The last statement is still incomplete - wait for the next line
             return
@@ -47,14 +72,16 @@ class StatementGrouper(object):
         for stmt in self.statements:
             yield stmt
         self.statements = []
+        return
 
     def close(self):
         if not self.lines:
             return
         tokens = parse(''.join(self.lines), encoding=self.encoding)
         for token in tokens:
-            if (token.ttype not in (Comment.Single, Comment.Multiline,
-                                    Newline, Whitespace)):
+            if not is_comment_or_space(token):
                 raise ValueError("Incomplete SQL statement: %s" %
                                  tokens)
+        self.lines = []
+        self.statements = []
         return tokens