From c0514596f09f3ab925ef473b2563b5884eb84c03 Mon Sep 17 00:00:00 2001
From: Michael Comella <michael.l.comella@gmail.com>
Date: Wed, 25 Jan 2017 16:03:28 -0800
Subject: [PATCH] Issue #25: Add scripts/prox_crosswalk with yelp -> TA ids.

---
 scripts/prox_crosswalk.py | 94 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 scripts/prox_crosswalk.py

diff --git a/scripts/prox_crosswalk.py b/scripts/prox_crosswalk.py
new file mode 100644
index 0000000..df293ca
--- /dev/null
+++ b/scripts/prox_crosswalk.py
@@ -0,0 +1,94 @@
+"""A series of helper functions to create a mapping from
+yelp IDs to place IDs from other providers in our database.
+
+Intended to be used from a REPL. Primary functions are:
+- yelp_ids_to_tripadvisor_ids
+
+TODO:
+- Handle hitting API limits
+- Handle network errors (e.g. TA API)
+
+"""
+from __future__ import print_function
+from app.constants import _tablePrefix
+from app.providers import tripadvisor as ta
+from app.providers import yelp
+from config import FIREBASE_CONFIG
+import pyrebase
+
+_CROSSWALK_PATH = _tablePrefix + 'crosswalk/'
+
+_firebase = pyrebase.initialize_app(FIREBASE_CONFIG)
+
+CROSSWALK_KEYS = {
+    'tripadvisor',
+    'website',
+    'wikipedia',
+}
+
+
+def _get_crosswalk_db(): return _firebase.database().child(_CROSSWALK_PATH)
+
+
+def _yelp_id_to_tripadvisor(yelp_id):
+    place = yelp.resolve_with_key(yelp_id)
+    name = place['name']
+    coord = place['coordinates']
+    coord_tuple = (coord['latitude'], coord['longitude'])
+    return ta.search(coord_tuple, name)
+
+
+def _yelp_ids_to_raw_tripadvisor(yelp_ids):
+    """Takes the given yelp IDs and returns a dictionary of yelp_id to
+    a list of matching TA places, as received from the TA API, which is:
+    [
+      {
+        'name': ...,
+        'location_id': ...,
+        ... # less important stuff
+      }
+    ]
+
+    Emphasis on the enclosing list. Places with no matches will be an empty list.
+
+    Calling this directly (rather than `yelp_ids_to_tripadvisor_ids`) can be useful for debugging.
+
+    :param yelp_ids: an iterable of yelp IDs
+    :return: {<yelp_id>: <data-received-from-TA>, ...}
+    """
+    out = {}
+    for yelp_id in yelp_ids:
+        res = _yelp_id_to_tripadvisor(yelp_id)
+        ta_place_list = res['data']
+        out[yelp_id] = ta_place_list
+    return out
+
+
+def _get_yelp_to_ta_map_from_raw_ta(raw_ta):
+    """
+    :param raw_ta: output of `yelp_ids_to_raw_tripadvisor`
+    :return: {<yelp_id>: <ta_id>}; only the first TA location is used.
+    """
+    out = {}
+    for yelp_id, ta_res in raw_ta.iteritems():
+        if len(ta_res) < 1:
+            out[yelp_id] = None
+        else:
+            out[yelp_id] = ta_res[0]['location_id']
+
+            # We take TA's top match so print out if we're dropping any places.
+            # We do this because disambiguating would add complexity.
+            if len(ta_res) > 1:
+                print('More than one match for yelp id, {}, dropping results:'.format(yelp_id))
+                for res in ta_res[1:]: print('    {}: {}'.format(res['location_id'], res['name']))
+    return out
+
+
+def yelp_ids_to_tripadvisor_ids(yelp_ids):
+    """Primary public TA function.
+
+    :param yelp_ids: an iterable of yelp ids.
+    :return: {<yelp_id>: <ta_id>, ...}; if no TA match, <ta_id> is None.
+    """
+    raw_ta = _yelp_ids_to_raw_tripadvisor(yelp_ids)
+    return _get_yelp_to_ta_map_from_raw_ta(raw_ta)