feat: Allow multiple listener rule condition blocks (#359)

Author: trevorrea

examples/complete-alb/main.tf

@@ -248,6 +248,9 @@ module "alb" {
             query_string = {
               key   = "weighted"
               value = "true"
+            },
+            path_pattern = {
+              values = ["/some/path"]
             }
           }]
         }

main.tf

@@ -360,7 +360,7 @@ resource "aws_lb_listener_rule" "this" {
   }
 
   dynamic "condition" {
-    for_each = try(each.value.conditions, [])
+    for_each = [for condition in each.value.conditions : condition if contains(keys(condition), "host_header")]
 
     content {
       dynamic "host_header" {
@@ -370,7 +370,13 @@ resource "aws_lb_listener_rule" "this" {
           values = host_header.value.values
         }
       }
+    }
+  }
+
+  dynamic "condition" {
+    for_each = [for condition in each.value.conditions : condition if contains(keys(condition), "http_header")]
 
+    content {
       dynamic "http_header" {
         for_each = try([condition.value.http_header], [])
 
@@ -379,23 +385,41 @@ resource "aws_lb_listener_rule" "this" {
           values           = http_header.value.values
         }
       }
+    }
+  }
 
+  dynamic "condition" {
+    for_each = [for condition in each.value.conditions : condition if contains(keys(condition), "http_request_method")]
+
+    content {
       dynamic "http_request_method" {
         for_each = try([condition.value.http_request_method], [])
 
         content {
           values = http_request_method.value.values
         }
       }
+    }
+  }
 
+  dynamic "condition" {
+    for_each = [for condition in each.value.conditions : condition if contains(keys(condition), "path_pattern")]
+
+    content {
       dynamic "path_pattern" {
         for_each = try([condition.value.path_pattern], [])
 
         content {
           values = path_pattern.value.values
         }
       }
+    }
+  }
+
+  dynamic "condition" {
+    for_each = [for condition in each.value.conditions : condition if contains(keys(condition), "query_string")]
 
+    content {
       dynamic "query_string" {
         for_each = try([condition.value.query_string], [])
 
@@ -404,7 +428,13 @@ resource "aws_lb_listener_rule" "this" {
           value = query_string.value.value
         }
       }
+    }
+  }
 
+  dynamic "condition" {
+    for_each = [for condition in each.value.conditions : condition if contains(keys(condition), "source_ip")]
+
+    content {
       dynamic "source_ip" {
         for_each = try([condition.value.source_ip], [])