Support non empty array matches for emails (#1147)

Author: skwowet

services/libs/opensearch/src/opensearchQueryParser.ts

@@ -289,6 +289,48 @@ export class OpensearchQueryParser {
       }
     }
 
+    if (operator === Operator.ARRAY_LENGTH) {
+      if (typeof value !== 'object') {
+        throw new Error(
+          'Array length should be used with an object containing operators and their values!',
+        )
+      }
+
+      const operatorsMapping = {
+        gte: '>=',
+        lte: '<=',
+        gt: '>',
+        lt: '<',
+        eq: '==',
+      }
+
+      const scriptQueries = Object.entries(value).map(([lengthOperator, arrayLength]) => {
+        if (typeof arrayLength !== 'number') {
+          throw new Error(`Array length value for operator ${lengthOperator} should be a number!`)
+        }
+
+        if (!Object.prototype.hasOwnProperty.call(operatorsMapping, lengthOperator)) {
+          throw new Error(`Invalid operator "${lengthOperator}" used in ARRAY_LENGTH`)
+        }
+
+        return {
+          script: {
+            source: `doc['${searchKey}'].length ${operatorsMapping[lengthOperator]} params.length`,
+            lang: 'painless',
+            params: {
+              length: arrayLength,
+            },
+          },
+        }
+      })
+
+      return {
+        bool: {
+          must: scriptQueries,
+        },
+      }
+    }
+
     return {
       term: {
         [searchKey]: value,

services/libs/types/src/opensearch.ts

@@ -88,4 +88,6 @@ export enum Operator {
   CONTAINS = 'contains',
 
   NOT = 'not',
+
+  ARRAY_LENGTH = 'arrayLength',
 }