From 350cb0cb6f674ec72bb1337f5ca6891f1d77b5cd Mon Sep 17 00:00:00 2001
From: Amit Upadhyay <upadhyay@gmail.com>
Date: Wed, 25 Oct 2023 16:56:30 +0530
Subject: [PATCH] wip processor

---
 fastn-core/src/library2022/mod.rs |  1 +
 fastn-core/src/tutor.rs           | 39 +++++++++++++++++++++++++++++++
 fastn/src/main.rs                 |  2 +-
 3 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/fastn-core/src/library2022/mod.rs b/fastn-core/src/library2022/mod.rs
index 3d9182cff1..785aae6d03 100644
--- a/fastn-core/src/library2022/mod.rs
+++ b/fastn-core/src/library2022/mod.rs
@@ -235,6 +235,7 @@ impl Library2022 {
                 processor::figma_tokens::process_figma_tokens_old(value, kind, doc, &self.config)
             }
             "http" => processor::http::process(value, kind, doc, &self.config).await,
+            "tutor" => fastn_core::tutor::process(value, kind, doc).await,
             "toc" => processor::toc::process(value, kind, doc, &self.config),
             "get-data" => processor::get_data::process(value, kind, doc, &self.config),
             "sitemap" => processor::sitemap::process(value, kind, doc, &self.config),
diff --git a/fastn-core/src/tutor.rs b/fastn-core/src/tutor.rs
index 753a79323d..c6f3074a38 100644
--- a/fastn-core/src/tutor.rs
+++ b/fastn-core/src/tutor.rs
@@ -15,6 +15,45 @@ pub async fn shutdown() -> fastn_core::Result<fastn_core::http::Response> {
     std::process::exit(0);
 }
 
+pub async fn process(
+    value: ftd::ast::VariableValue,
+    kind: ftd::interpreter::Kind,
+    doc: &ftd::interpreter::TDoc<'_>,
+) -> ftd::interpreter::Result<ftd::interpreter::Value> {
+    if !fastn_core::tutor::is_tutor() {
+        return Err(ftd::interpreter::Error::OtherError(
+            "tutor process only works in tutor mode".to_string(),
+        ));
+    }
+
+    let state = match tokio::fs::read(
+        std::path::PathBuf::from(dirs::home_dir().unwrap())
+            .join(".fastn")
+            .join("tutor.json"),
+    )
+    .await
+    {
+        Ok(v) => serde_json::from_slice(&v)?,
+        Err(e) => match e.kind() {
+            std::io::ErrorKind::NotFound => TutorState::default(),
+            _ => {
+                return Err(ftd::interpreter::Error::OtherError(format!(
+                    "tutor error: {}",
+                    e.to_string()
+                )))
+            }
+        },
+    };
+
+    doc.from_json(&state, &kind, &value)
+}
+
+#[derive(Debug, Default, serde::Deserialize, serde::Serialize)]
+struct TutorState {
+    done: Vec<String>,
+    current: String,
+}
+
 pub fn is_tutor() -> bool {
     // https://github.com/orgs/fastn-stack/discussions/1414
     // with either of these are passed we allow APIs like /-/shutdown/, `/-/start/` etc
diff --git a/fastn/src/main.rs b/fastn/src/main.rs
index 4c74907afe..db4d787b91 100644
--- a/fastn/src/main.rs
+++ b/fastn/src/main.rs
@@ -479,7 +479,7 @@ fn app(version: &'static str) -> clap::Command {
                 .hide(true) // hidden since the feature is not being released yet.
         )
         .subcommand(
-            clap::Command::new("tutor").about("Start fastn tutor")
+            clap::Command::new("tutor").about("Start fastn tutor").hide(true)
         )
         .subcommand(
             clap::Command::new("start-tracking")