Support files for Google docs/spreadsheet/etc in GoogleDrive source (#162)

Author: badmonster0

src/ops/sources/google_drive.rs

@@ -1,6 +1,8 @@
-use std::sync::Arc;
+use std::{
+    collections::HashMap,
+    sync::{Arc, LazyLock},
+};
 
-use futures::future::try_join;
 use google_drive3::{
     api::Scope,
     yup_oauth2::{read_service_account_key, ServiceAccountAuthenticator},
@@ -10,11 +12,62 @@ use http_body_util::BodyExt;
 use hyper_rustls::HttpsConnector;
 use hyper_util::client::legacy::connect::HttpConnector;
 use indexmap::IndexSet;
-use log::debug;
+use log::warn;
 
 use crate::ops::sdk::*;
 
+struct ExportMimeType {
+    text: &'static str,
+    binary: &'static str,
+}
+
 const FOLDER_MIME_TYPE: &'static str = "application/vnd.google-apps.folder";
+const FILE_MIME_TYPE: &'static str = "application/vnd.google-apps.file";
+static EXPORT_MIME_TYPES: LazyLock<HashMap<&'static str, ExportMimeType>> = LazyLock::new(|| {
+    HashMap::from([
+        (
+            "application/vnd.google-apps.document",
+            ExportMimeType {
+                text: "text/markdown",
+                binary: "application/pdf",
+            },
+        ),
+        (
+            "application/vnd.google-apps.spreadsheet",
+            ExportMimeType {
+                text: "text/csv",
+                binary: "application/pdf",
+            },
+        ),
+        (
+            "application/vnd.google-apps.presentation",
+            ExportMimeType {
+                text: "text/plain",
+                binary: "application/pdf",
+            },
+        ),
+        (
+            "application/vnd.google-apps.drawing",
+            ExportMimeType {
+                text: "image/svg+xml",
+                binary: "image/png",
+            },
+        ),
+        (
+            "application/vnd.google-apps.script",
+            ExportMimeType {
+                text: "application/vnd.google-apps.script+json",
+                binary: "application/vnd.google-apps.script+json",
+            },
+        ),
+    ])
+});
+
+fn is_supported_file_type(mime_type: &str) -> bool {
+    !mime_type.starts_with("application/vnd.google-apps.")
+        || EXPORT_MIME_TYPES.contains_key(mime_type)
+        || mime_type == FILE_MIME_TYPE
+}
 
 #[derive(Debug, Deserialize)]
 pub struct Spec {
@@ -91,11 +144,21 @@ impl Executor {
             let (_, files) = list_call.doit().await?;
             if let Some(files) = files.files {
                 for file in files {
-                    if let Some(id) = file.id {
-                        if file.mime_type.as_ref() == Some(&FOLDER_MIME_TYPE.to_string()) {
-                            Box::pin(self.traverse_folder(&id, visited_folder_ids, result)).await?;
-                        } else {
-                            result.insert(KeyValue::Str(Arc::from(id)));
+                    match (file.id, file.mime_type) {
+                        (Some(id), Some(mime_type)) => {
+                            if mime_type == FOLDER_MIME_TYPE {
+                                Box::pin(self.traverse_folder(&id, visited_folder_ids, result))
+                                    .await?;
+                            } else if is_supported_file_type(&mime_type) {
+                                result.insert(KeyValue::Str(Arc::from(id)));
+                            } else {
+                                warn!("Skipping file with unsupported mime type: id={id}, mime_type={mime_type}, name={:?}", file.name);
+                            }
+                        }
+                        (id, mime_type) => {
+                            warn!(
+                                "Skipping file with incomplete metadata: id={id:?}, mime_type={mime_type:?}",
+                            );
                         }
                     }
                 }
@@ -121,17 +184,32 @@ impl SourceExecutor for Executor {
     async fn get_value(&self, key: &KeyValue) -> Result<Option<FieldValues>> {
         let file_id = key.str_value()?;
 
-        let filename = async {
-            let (_, file) = self
-                .drive_hub
+        let (_, file) = self
+            .drive_hub
+            .files()
+            .get(file_id)
+            .add_scope(Scope::Readonly)
+            .doit()
+            .await?;
+
+        let resp_body = if let Some(export_mime_type) = file
+            .mime_type
+            .as_ref()
+            .and_then(|mime_type| EXPORT_MIME_TYPES.get(mime_type.as_str()))
+        {
+            let target_mime_type = if self.binary {
+                export_mime_type.binary
+            } else {
+                export_mime_type.text
+            };
+            self.drive_hub
                 .files()
-                .get(file_id)
+                .export(&file_id, target_mime_type)
                 .add_scope(Scope::Readonly)
                 .doit()
-                .await?;
-            anyhow::Ok(file.name.unwrap_or_default())
-        };
-        let body = async {
+                .await?
+                .into_body()
+        } else {
             let (resp, _) = self
                 .drive_hub
                 .files()
@@ -140,13 +218,11 @@ impl SourceExecutor for Executor {
                 .param("alt", "media")
                 .doit()
                 .await?;
-            let content = resp.into_body().collect().await?;
-            anyhow::Ok(content)
+            resp.into_body()
         };
-        let (filename, content) = try_join(filename, body).await?;
-
+        let content = resp_body.collect().await?;
         let mut fields = Vec::with_capacity(2);
-        fields.push(filename.into());
+        fields.push(file.name.unwrap_or_default().into());
         if self.binary {
             fields.push(content.to_bytes().to_vec().into());
         } else {