chore: refactored ga metric and dimension names to constants (#4305)

Author: jpaten

analytics/analytics_package/analytics/fields.py

@@ -0,0 +1,25 @@
+# Metric names
+METRIC_EVENT_COUNT = 'eventCount'
+METRIC_TOTAL_USERS = 'totalUsers'
+
+# DIMENSIONS
+DIMENSION_PAGE_PATH = {
+    'id': 'pagePath',
+    'alias': 'page_path',
+    'remove_matches': None,
+}
+DIMENSION_BUILTIN_URL = {
+    'id': 'linkUrl',
+    'alias': 'builtin_url',
+    'remove_matches': r"\s*",
+}
+DIMENSION_EVENT_NAME = {
+    'id': 'eventName',
+    'alias': 'event_name',
+    'remove_matches': None,
+}
+DIMENSION_CUSTOM_URL = {
+    'id': 'customEvent:click_url',
+    'alias': 'outbound_url',
+    'remove_matches': r"\(not set\)",
+}