From 67251faed7d031efe94c44e9c7529c3b30bb562d Mon Sep 17 00:00:00 2001
From: Danuel <public.danuel@gmail.com>
Date: Sun, 5 Jul 2020 01:35:25 +0900
Subject: [PATCH] Add a specification to implement the interface to the
 interface.

---
 async-graphql-parser/src/schema.pest                         | 2 +-
 async-graphql-parser/src/schema.rs                           | 1 +
 async-graphql-parser/src/schema_parser.rs                    | 5 +++++
 async-graphql-parser/tests/schemas/implements.graphql        | 4 ++++
 async-graphql-parser/tests/schemas/implements_amp.graphql    | 3 +++
 .../tests/schemas/implements_amp_canonical.graphql           | 4 ++++
 6 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/async-graphql-parser/src/schema.pest b/async-graphql-parser/src/schema.pest
index 16b2d0f7..dee6be5c 100644
--- a/async-graphql-parser/src/schema.pest
+++ b/async-graphql-parser/src/schema.pest
@@ -46,7 +46,7 @@ arguments_definition = { "(" ~ input_value_definition* ~ ")" }
 field_definition = { string? ~ name ~ arguments_definition? ~ ":" ~ type_ ~ directives? }
 fields_definition = { "{" ~ field_definition* ~ "}" }
 object_type_definition = { string? ~ extend? ~ "type" ~ name ~ implements_interfaces? ~ directives? ~ fields_definition? }
-interface_type_definition = { string? ~ extend? ~ "interface" ~ name ~ directives? ~ fields_definition? }
+interface_type_definition = { string? ~ extend? ~ "interface" ~ name ~ implements_interfaces? ~ directives? ~ fields_definition? }
 union_member_types = { "=" ~ "|"? ~ name ~ ("|" ~ name)* }
 union_type_definition = { string? ~ extend? ~ "union" ~ name ~ directives? ~ union_member_types? }
 enum_value_definition = { string? ~ name ~ directives? }
diff --git a/async-graphql-parser/src/schema.rs b/async-graphql-parser/src/schema.rs
index c595d195..f867ba63 100644
--- a/async-graphql-parser/src/schema.rs
+++ b/async-graphql-parser/src/schema.rs
@@ -93,6 +93,7 @@ pub struct InterfaceType {
     pub extend: bool,
     pub description: Option<Positioned<String>>,
     pub name: Positioned<String>,
+    pub implements_interfaces: Vec<Positioned<String>>,
     pub directives: Vec<Positioned<Directive>>,
     pub fields: Vec<Positioned<Field>>,
 }
diff --git a/async-graphql-parser/src/schema_parser.rs b/async-graphql-parser/src/schema_parser.rs
index a7d47cac..948d8226 100644
--- a/async-graphql-parser/src/schema_parser.rs
+++ b/async-graphql-parser/src/schema_parser.rs
@@ -475,6 +475,7 @@ fn parse_interface_type(
     let mut description = None;
     let mut extend = false;
     let mut name = None;
+    let mut implements_interfaces = None;
     let mut directives = None;
     let mut fields = None;
 
@@ -485,6 +486,9 @@ fn parse_interface_type(
             }
             Rule::extend => extend = true,
             Rule::name => name = Some(Positioned::new(pair.as_str().to_string(), pc.step(&pair))),
+            Rule::implements_interfaces => {
+                implements_interfaces = Some(parse_implements_interfaces(pair, pc)?)
+            }
             Rule::directives => directives = Some(parse_directives(pair, pc)?),
             Rule::fields_definition => fields = Some(parse_fields_definition(pair, pc)?),
             _ => unreachable!(),
@@ -496,6 +500,7 @@ fn parse_interface_type(
             extend,
             description,
             name: name.unwrap(),
+            implements_interfaces: implements_interfaces.unwrap_or_default(),
             directives: directives.unwrap_or_default(),
             fields: fields.unwrap_or_default(),
         },
diff --git a/async-graphql-parser/tests/schemas/implements.graphql b/async-graphql-parser/tests/schemas/implements.graphql
index a84b001a..473bc7aa 100644
--- a/async-graphql-parser/tests/schemas/implements.graphql
+++ b/async-graphql-parser/tests/schemas/implements.graphql
@@ -1,3 +1,7 @@
 type Type1 implements IOne
 
 type Type1 implements IOne & ITwo
+
+interface Type1 implements IOne
+
+interface Type1 implements IOne & ITwo
diff --git a/async-graphql-parser/tests/schemas/implements_amp.graphql b/async-graphql-parser/tests/schemas/implements_amp.graphql
index e4ff2d38..afff22d7 100644
--- a/async-graphql-parser/tests/schemas/implements_amp.graphql
+++ b/async-graphql-parser/tests/schemas/implements_amp.graphql
@@ -1,2 +1,5 @@
 type Type1 implements & IOne & ITwo
 type Type2 implements & IOne
+
+interface Type1 implements & IOne & ITwo
+interface Type2 implements & IOne
diff --git a/async-graphql-parser/tests/schemas/implements_amp_canonical.graphql b/async-graphql-parser/tests/schemas/implements_amp_canonical.graphql
index f066126b..6b287d41 100644
--- a/async-graphql-parser/tests/schemas/implements_amp_canonical.graphql
+++ b/async-graphql-parser/tests/schemas/implements_amp_canonical.graphql
@@ -1,3 +1,7 @@
 type Type1 implements IOne & ITwo
 
 type Type2 implements IOne
+
+interface Type1 implements IOne & ITwo
+
+interface Type2 implements IOne