feat(debug): debugging info for interpolation service

middleware/interpolate.js

@@ -3,6 +3,8 @@ const logger = require( 'pelias-logger' ).get( 'api' );
 const source_mapping = require('../helper/type_mapping').source_mapping;
 const _ = require('lodash');
 const stable = require('stable');
+const Debug = require('../helper/debug');
+const debugLog = new Debug('middleware:interpolate');
 
 /**
 example response from interpolation web service:
@@ -57,6 +59,7 @@ function setup(service, should_execute) {
 
     // perform interpolations asynchronously for all relevant hits
     const start = (new Date()).getTime();
+    const initialTime = debugLog.beginTimer(req);
 
     logger.info(`[interpolation] [street_results] count=${street_results.length}`);
 
@@ -71,12 +74,14 @@ function setup(service, should_execute) {
         // note: leave this hit unmodified
         if (!_.has(interpolation_result, 'properties')) {
           logger.debug(`[interpolation] [miss] ${req.clean.parsed_text}`);
+          debugLog.push(req, 'miss');
           return;
         }
 
         // the interpolation service returned a valid result, debug log for posterity
         // note: we now merge those values with the existing 'street' record
         logger.debug(`[interpolation] [hit] ${req.clean.parsed_text} ${JSON.stringify(interpolation_result)}`);
+        debugLog.push(req, interpolation_result);
 
         // -- metadata --
         source_result.layer = 'address';
@@ -126,6 +131,7 @@ function setup(service, should_execute) {
 
       // log the execution time, continue
       logger.info( `[interpolation] [took] ${(new Date()).getTime() - start} ms`);
+      debugLog.stopTimer(req, initialTime);
       next();
 
     });

service/configurations/Interpolation.js

@@ -1,6 +1,7 @@
 const url = require('url');
-
 const _ = require('lodash');
+const Debug = require('../../helper/debug');
+const debugLog = new Debug('interpolation:request');
 
 const ServiceConfiguration = require('pelias-microservice-wrapper').ServiceConfiguration;
 
@@ -10,13 +11,16 @@ class Language extends ServiceConfiguration {
   }
 
   getParameters(req, hit) {
-    return {
+    let params = {
       number: req.clean.parsed_text.number,
       street: hit.address_parts.street || req.clean.parsed_text.street,
       lat: hit.center_point.lat,
       lon: hit.center_point.lon
     };
 
+    debugLog.push(req, params);
+
+    return params;
   }
 
   getUrl(req) {