feat: Allow multiple filters in event source mappings (#379)

Co-authored-by: Anton Babenko <anton@antonbabenko.com>

Author: moritzzimmer

examples/event-source-mapping/main.tf

@@ -31,11 +31,21 @@ module "lambda_function" {
       event_source_arn           = aws_dynamodb_table.this.stream_arn
       starting_position          = "LATEST"
       destination_arn_on_failure = aws_sqs_queue.failure.arn
-      filter_criteria = {
-        pattern = jsonencode({
-          eventName : ["INSERT"]
-        })
-      }
+      filter_criteria = [
+        {
+          pattern = jsonencode({
+            eventName : ["INSERT"]
+          })
+        },
+        {
+          pattern = jsonencode({
+            data : {
+              Temperature : [{ numeric : [">", 0, "<=", 100] }]
+              Location : ["Oslo"]
+            }
+          })
+        }
+      ]
     }
     kinesis = {
       event_source_arn  = aws_kinesis_stream.this.arn

main.tf

@@ -307,8 +307,12 @@ resource "aws_lambda_event_source_mapping" "this" {
     for_each = try(each.value.filter_criteria, null) != null ? [true] : []
 
     content {
-      filter {
-        pattern = try(each.value["filter_criteria"].pattern, null)
+      dynamic "filter" {
+        for_each = try(flatten([each.value.filter_criteria]), [])
+
+        content {
+          pattern = try(filter.value.pattern, null)
+        }
       }
     }
   }