Add tide integration book section

docs/en/src/SUMMARY.md

@@ -26,6 +26,7 @@
     - [Query complexity and depth](depth_and_complexity.md)
     - [Hide content in introspection](visibility.md)
 - [Integrations](integrations.md)
+    - [Tide](integrations_to_tide.md)
     - [Warp](integrations_to_warp.md)
     - [Actix-web](integrations_to_actix_web.md)
 - [Advanced topics](advanced_topics.md)

docs/en/src/integrations_to_tide.md

@@ -0,0 +1,73 @@
+# Actix-web
+
+`async_graphql_tide` provides an implementation of [tide::Endpoint](https://docs.rs/tide/0.15.0/tide/trait.Endpoint.html) trait. It also provides `receive_request` and `respond` functions to convert a Tide request to a GraphQL request and back to Tide response, if you want to  handle the request manually.
+
+## Request example
+
+When you create your Tide server, you will need to pass the `async_graphql_tide::endpoint` with your schema as the POST request handler. Please note that you need to enable the `attributes` feature in `tide` for this example to work.
+
+```rust
+use async_graphql::{
+    http::{playground_source, GraphQLPlaygroundConfig},
+    Context, EmptyMutation, EmptySubscription, Object, Schema, SimpleObject,
+};
+use tide::{http::mime, Body, Response, StatusCode};
+
+#[derive(SimpleObject)]
+pub struct Demo {
+    pub id: usize,
+}
+
+pub struct QueryRoot;
+
+#[Object]
+impl QueryRoot {
+    async fn demo(&self, _ctx: &Context<'_>) -> Demo {
+        Demo { id: 42 }
+    }
+}
+
+#[async_std::main]
+async fn main() -> tide::Result<()> {
+    let mut app = tide::new();
+
+    // create schema
+    let schema = Schema::build(QueryRoot, EmptyMutation, EmptySubscription).finish();
+
+    // add tide endpoint
+    app.at("/graphql")
+        .post(async_graphql_tide::endpoint(schema));
+
+    // enable graphql playground
+    app.at("/").get(|_| async move {
+        Ok(Response::builder(StatusCode::Ok)
+            .body(Body::from_string(playground_source(
+                // note that the playground needs to know
+                // the path to the graphql endpoint
+                GraphQLPlaygroundConfig::new("/graphql"),
+            )))
+            .content_type(mime::HTML)
+            .build())
+    });
+
+    Ok(app.listen("127.0.0.1:8080").await?)
+}
+```
+
+## Manually handle the request
+
+If you want to manually handle the request, for example to read a header, you can skip `async_graphql_tide::endpoint` and use `receive_request` and `respond` functions instead.
+
+```rust
+app.at("/graphql").post(move |req: tide::Request<()>| {
+    let schema = schema.clone();
+    async move {
+        let req = async_graphql_tide::receive_request(req).await?;
+        async_graphql_tide::respond(schema.execute(req).await)
+    }
+});
+```
+
+## More examples
+
+[https://github.com/async-graphql/examples/tree/master/tide](https://github.com/async-graphql/examples/tree/master/tide)