rspack_plugin_runtime 0.100.1

use std::sync::LazyLock;

use rspack_core::{
  Chunk, Compilation, RuntimeCodeTemplate, RuntimeGlobals, RuntimeModule,
  RuntimeModuleGenerateContext, RuntimeModuleStage, RuntimeTemplate, compile_boolean_matcher,
  impl_runtime_module,
};
use rspack_plugin_javascript::impl_plugin_for_js_plugin::chunk_has_js;

use super::{generate_javascript_hmr_runtime, utils::get_output_dir};
use crate::{
  extract_runtime_globals_from_ejs, get_chunk_runtime_requirements,
  runtime_module::utils::{get_initial_chunk_ids, stringify_chunks},
};

static IMPORT_SCRIPTS_CHUNK_LOADING_TEMPLATE: &str =
  include_str!("runtime/import_scripts_chunk_loading.ejs");
static IMPORT_SCRIPTS_CHUNK_LOADING_WITH_LOADING_TEMPLATE: &str =
  include_str!("runtime/import_scripts_chunk_loading_with_loading.ejs");
static IMPORT_SCRIPTS_CHUNK_LOADING_WITH_HMR_TEMPLATE: &str =
  include_str!("runtime/import_scripts_chunk_loading_with_hmr.ejs");
static IMPORT_SCRIPTS_CHUNK_LOADING_WITH_HMR_MANIFEST_TEMPLATE: &str =
  include_str!("runtime/import_scripts_chunk_loading_with_hmr_manifest.ejs");
static JAVASCRIPT_HOT_MODULE_REPLACEMENT_TEMPLATE: &str =
  include_str!("runtime/javascript_hot_module_replacement.ejs");

static IMPORT_SCRIPTS_CHUNK_LOADING_RUNTIME_REQUIREMENTS: LazyLock<RuntimeGlobals> =
  LazyLock::new(|| extract_runtime_globals_from_ejs(IMPORT_SCRIPTS_CHUNK_LOADING_TEMPLATE));
static IMPORT_SCRIPTS_CHUNK_LOADING_WITH_LOADING_RUNTIME_REQUIREMENTS: LazyLock<RuntimeGlobals> =
  LazyLock::new(|| {
    extract_runtime_globals_from_ejs(IMPORT_SCRIPTS_CHUNK_LOADING_WITH_LOADING_TEMPLATE)
  });
static IMPORT_SCRIPTS_CHUNK_LOADING_WITH_HMR_RUNTIME_REQUIREMENTS: LazyLock<RuntimeGlobals> =
  LazyLock::new(|| {
    extract_runtime_globals_from_ejs(IMPORT_SCRIPTS_CHUNK_LOADING_WITH_HMR_TEMPLATE)
  });
static IMPORT_SCRIPTS_CHUNK_LOADING_WITH_HMR_MANIFEST_RUNTIME_REQUIREMENTS: LazyLock<
  RuntimeGlobals,
> = LazyLock::new(|| {
  extract_runtime_globals_from_ejs(IMPORT_SCRIPTS_CHUNK_LOADING_WITH_HMR_MANIFEST_TEMPLATE)
});
static JAVASCRIPT_HOT_MODULE_REPLACEMENT_RUNTIME_REQUIREMENTS: LazyLock<RuntimeGlobals> =
  LazyLock::new(|| {
    let mut res = extract_runtime_globals_from_ejs(JAVASCRIPT_HOT_MODULE_REPLACEMENT_TEMPLATE);
    // ensure chunk handlers is optional
    res.remove(RuntimeGlobals::ENSURE_CHUNK_HANDLERS);
    res
  });

#[impl_runtime_module]
#[derive(Debug, Default)]
pub struct ImportScriptsChunkLoadingRuntimeModule {
  with_create_script_url: bool,
}

impl ImportScriptsChunkLoadingRuntimeModule {
  pub fn new(runtime_template: &RuntimeTemplate, with_create_script_url: bool) -> Self {
    Self::with_default(runtime_template, with_create_script_url)
  }

  async fn generate_base_uri(
    &self,
    chunk: &Chunk,
    compilation: &Compilation,
    runtime_template: &RuntimeCodeTemplate<'_>,
  ) -> rspack_error::Result<String> {
    let base_uri = if let Some(base_uri) = chunk
      .get_entry_options(&compilation.build_chunk_graph_artifact.chunk_group_by_ukey)
      .and_then(|options| options.base_uri.as_ref())
      .map(|base_uri| rspack_util::json_stringify_str(base_uri))
    {
      base_uri
    } else {
      let root_output_dir = get_output_dir(chunk, compilation, false).await?;
      format!(
        "self.location + {}",
        rspack_util::json_stringify_str(&if root_output_dir.is_empty() {
          String::new()
        } else {
          format!("/../{root_output_dir}")
        })
      )
    };
    Ok(format!(
      "{} = {};\n",
      runtime_template.render_runtime_globals(&RuntimeGlobals::BASE_URI),
      base_uri
    ))
  }

  fn template_id(&self, id: TemplateId) -> String {
    let base_id = self.id.as_str();

    match id {
      TemplateId::Raw => base_id.to_string(),
      TemplateId::WithLoading => format!("{base_id}_with_loading"),
      TemplateId::WithHmr => format!("{base_id}_with_hmr"),
      TemplateId::WithHmrManifest => format!("{base_id}_with_hmr_manifest"),
      TemplateId::HmrRuntime => format!("{base_id}_hmr_runtime"),
    }
  }

  pub fn get_runtime_requirements_basic() -> RuntimeGlobals {
    *IMPORT_SCRIPTS_CHUNK_LOADING_RUNTIME_REQUIREMENTS
  }

  pub fn get_runtime_requirements_with_loading() -> RuntimeGlobals {
    *IMPORT_SCRIPTS_CHUNK_LOADING_WITH_LOADING_RUNTIME_REQUIREMENTS
  }

  pub fn get_runtime_requirements_with_hmr() -> RuntimeGlobals {
    *IMPORT_SCRIPTS_CHUNK_LOADING_WITH_HMR_RUNTIME_REQUIREMENTS
      | *JAVASCRIPT_HOT_MODULE_REPLACEMENT_RUNTIME_REQUIREMENTS
  }

  pub fn get_runtime_requirements_with_hmr_manifest() -> RuntimeGlobals {
    *IMPORT_SCRIPTS_CHUNK_LOADING_WITH_HMR_MANIFEST_RUNTIME_REQUIREMENTS
  }
}

enum TemplateId {
  Raw,
  WithLoading,
  WithHmr,
  WithHmrManifest,
  HmrRuntime,
}

#[async_trait::async_trait]
impl RuntimeModule for ImportScriptsChunkLoadingRuntimeModule {
  fn template(&self) -> Vec<(String, String)> {
    vec![
      (
        self.template_id(TemplateId::Raw),
        include_str!("runtime/import_scripts_chunk_loading.ejs").to_string(),
      ),
      (
        self.template_id(TemplateId::WithLoading),
        include_str!("runtime/import_scripts_chunk_loading_with_loading.ejs").to_string(),
      ),
      (
        self.template_id(TemplateId::WithHmr),
        include_str!("runtime/import_scripts_chunk_loading_with_hmr.ejs").to_string(),
      ),
      (
        self.template_id(TemplateId::WithHmrManifest),
        include_str!("runtime/import_scripts_chunk_loading_with_hmr_manifest.ejs").to_string(),
      ),
      (
        self.template_id(TemplateId::HmrRuntime),
        include_str!("runtime/javascript_hot_module_replacement.ejs").to_string(),
      ),
    ]
  }

  async fn generate(
    &self,
    context: &RuntimeModuleGenerateContext<'_>,
  ) -> rspack_error::Result<String> {
    let compilation = context.compilation;
    let runtime_template = context.runtime_template;
    let chunk = compilation
      .build_chunk_graph_artifact
      .chunk_by_ukey
      .expect_get(&self.chunk.expect("The chunk should be attached."));

    let runtime_requirements = get_chunk_runtime_requirements(compilation, &chunk.ukey());
    let initial_chunks = get_initial_chunk_ids(self.chunk, compilation, chunk_has_js);

    let with_base_uri = runtime_requirements.contains(RuntimeGlobals::BASE_URI);
    let with_hmr = runtime_requirements.contains(RuntimeGlobals::HMR_DOWNLOAD_UPDATE_HANDLERS);
    let with_hmr_manifest = runtime_requirements.contains(RuntimeGlobals::HMR_DOWNLOAD_MANIFEST);
    let with_loading = runtime_requirements.contains(RuntimeGlobals::ENSURE_CHUNK_HANDLERS);
    let with_callback = runtime_requirements.contains(RuntimeGlobals::CHUNK_CALLBACK);

    let condition_map = compilation
      .build_chunk_graph_artifact
      .chunk_graph
      .get_chunk_condition_map(&chunk.ukey(), compilation, chunk_has_js);
    let has_js_matcher = compile_boolean_matcher(&condition_map);

    let mut source = String::default();

    if with_base_uri {
      source.push_str(
        &self
          .generate_base_uri(chunk, compilation, runtime_template)
          .await?,
      );
    }

    // object to store loaded chunks
    // "1" means "already loaded"
    if with_hmr {
      let state_expression = format!(
        "{}_importScripts",
        runtime_template.render_runtime_globals(&RuntimeGlobals::HMR_RUNTIME_STATE_PREFIX)
      );
      source.push_str(&format!(
        "var installedChunks = {} = {} || {};\n",
        state_expression,
        state_expression,
        &stringify_chunks(&initial_chunks, 1)
      ));
    } else {
      source.push_str(&format!(
        "var installedChunks = {};\n",
        &stringify_chunks(&initial_chunks, 1)
      ));
    }

    if with_loading || with_callback {
      let render_source = runtime_template.render(
        &self.template_id(TemplateId::Raw),
        Some(serde_json::json!({
          "_chunk_loading_global_expr": format!(
            "{}[\"{}\"]",
            &compilation.options.output.global_object, &compilation.options.output.chunk_loading_global
          ),
        })),
      )?;

      // If chunkId not corresponding chunkName will skip load it.
      source.push_str(&render_source);
    }

    if with_loading {
      let render_source = runtime_template.render(
        &self.template_id(TemplateId::WithLoading),
        Some(serde_json::json!({
          "_js_matcher": has_js_matcher.render("chunkId"),
          "_with_create_script_url": self.with_create_script_url,
        })),
      )?;
      source.push_str(&render_source);
    }

    if with_hmr {
      let source_with_hmr = runtime_template.render(&self.template_id(TemplateId::WithHmr), Some(serde_json::json!({
        "_with_create_script_url": self.with_create_script_url,
        "_global_object": &compilation.options.output.global_object.as_str(),
        "_hot_update_global": &rspack_util::json_stringify_str(&compilation.options.output.hot_update_global),
      })))?;
      source.push_str(&source_with_hmr);
      let hmr_runtime = generate_javascript_hmr_runtime(
        &self.template_id(TemplateId::HmrRuntime),
        "importScripts",
        runtime_template,
      )?;
      source.push_str(&hmr_runtime);
    }

    if with_hmr_manifest {
      // TODO: import_scripts_chunk_loading_with_hmr_manifest same as jsonp_chunk_loading_with_hmr_manifest
      let source_with_hmr_manifest =
        runtime_template.render(&self.template_id(TemplateId::WithHmrManifest), None)?;

      source.push_str(&source_with_hmr_manifest);
    }

    Ok(source)
  }

  fn stage(&self) -> RuntimeModuleStage {
    RuntimeModuleStage::Attach
  }
}