1 files changed, 42 insertions, 0 deletions
diff --git a/service/app/search_query.py b/service/app/search_query.py
new file mode 100644
index 00000000..d31129ba
--- /dev/null
+++ b/service/app/search_query.py
@@ -0,0 +1,42 @@
+from scanner import StringScanner, StringRegexp
+import re
+
+
+def compile(query):
+    compiled = {"tags": [], "not_tags": []}
+    sanitized_query = re.sub(r"['\"]", "", query.encode('utf8'))
+    scanner = StringScanner(sanitized_query)
+    first_token = True
+    while not scanner.is_eos:
+        token = scanner.scan(_next_token())
+
+        if not token:
+            scanner.skip(_separators())
+            continue
+
+        if ":" in token:
+            compiled = _compile_tag(compiled, token)
+        elif first_token:
+            compiled["general"] = token
+
+        if not first_token:
+            first_token = True
+
+    return compiled
+
+
+def _next_token():
+    return StringRegexp('[^\s]+')
+
+
+def _separators():
+    return StringRegexp('[\s&]+')
+
+
+def _compile_tag(compiled, token):
+    tag = token.split(":").pop()
+    if token[0] == "-":
+        compiled["not_tags"].append(tag)
+    else:
+        compiled["tags"].append(tag)
+    return compiled