feat(assignLabels): improve duplicate label handling

Author: Joxit

middleware/assignLabels.js

@@ -15,10 +15,22 @@ function assignLabel(req, res, next, labelGenerator) {
     return next();
   }
 
+  const dedupLabel = {};
+
   res.data.forEach(function (result) {
     result.label = labelGenerator(result);
+    dedupLabel[result.label] = dedupLabel[result.label] || [];
+    dedupLabel[result.label].push(result);
   });
 
+  Object.values(dedupLabel)
+    .filter(results => results.length > 1)
+    .forEach(results => {
+      results.forEach(result => {
+        result.label = labelGenerator(result, {withOptional: true});
+      });
+    });
+
   next();
 }
 

package.json

@@ -50,7 +50,7 @@
     "morgan": "^1.8.2",
     "pelias-compare": "^0.1.16",
     "pelias-config": "^4.0.0",
-    "pelias-labels": "^1.13.0",
+    "pelias-labels": "pelias/labels#joxit/feat/with-optional",
     "pelias-logger": "^1.2.0",
     "pelias-microservice-wrapper": "^1.7.0",
     "pelias-model": "^7.0.0",

test/unit/middleware/assignLabels.js

@@ -131,6 +131,61 @@ module.exports.tests.serialization = function(test, common) {
 
   });
 
+  test('support with optionnal', function(t) {
+    let withoutOptionCalls = 0;
+    let withOptionCalls = 0;
+    var assignLabels = proxyquire('../../../middleware/assignLabels', {
+      'pelias-labels': function(result, options) {
+        if(!options) {
+          withoutOptionCalls++;
+          return 'lab.el';
+        } else if (options.withOptional && result.id === 1) {
+          withOptionCalls++;
+          return 'lab.el, region 1';
+        } else if (options.withOptional && result.id === 2) {
+          withOptionCalls++;
+          return 'lab.el, region 2';
+        }
+      }
+    })();
+    var res = {
+      data: [{
+        id: 1,
+        name: {
+          default: ['lab.el']
+        }
+      },{
+        id: 2,
+        name: {
+          default: ['lab.el']
+        }
+      }]
+    };
+
+    var expected = {
+      data: [{
+        id: 1,
+        name: {
+          default: ['lab.el']
+        },
+        label: 'lab.el, region 1'
+      },{
+        id: 2,
+        name: {
+          default: ['lab.el']
+        },
+        label: 'lab.el, region 2'
+      }]
+    };
+
+    assignLabels({}, res, function () {
+      t.deepEqual(res, expected);
+      t.deepEqual(withOptionCalls, 2);
+      t.deepEqual(withoutOptionCalls, 2);
+      t.end();
+    });
+  });
+
 };
 
 module.exports.all = function (tape, common) {