[Keyword search] Core node endpoint

Description
---
Fixes dust-tt/tasks#1613

Risks
---
na (endpoint not used)

Deploy
---
core

core/bin/core_api.rs

@@ -48,7 +48,9 @@ use dust::{
     providers::provider::{provider, ProviderID},
     run,
     search_filter::{Filterable, SearchFilter},
-    search_stores::search_store::{ElasticsearchSearchStore, SearchStore},
+    search_stores::search_store::{
+        DatasourceViewFilter, ElasticsearchSearchStore, NodesSearchOptions, SearchStore,
+    },
     sqlite_workers::client::{self, HEARTBEAT_INTERVAL_MS},
     stores::{
         postgres,
@@ -3074,6 +3076,45 @@ async fn folders_delete(
     }
 }
 
+#[derive(serde::Deserialize)]
+struct NodesSearchPayload {
+    query: String,
+    // filter: { datasource_id: string, view_filter: string[] }[]
+    filter: Vec<DatasourceViewFilter>,
+    options: Option<NodesSearchOptions>,
+}
+
+async fn nodes_search(
+    State(state): State<Arc<APIState>>,
+    Json(payload): Json<NodesSearchPayload>,
+) -> (StatusCode, Json<APIResponse>) {
+    let nodes = match state
+        .search_store
+        .search_nodes(payload.query, payload.filter, payload.options)
+        .await
+    {
+        Ok(nodes) => nodes,
+        Err(e) => {
+            return error_response(
+                StatusCode::INTERNAL_SERVER_ERROR,
+                "internal_server_error",
+                "Failed to search nodes",
+                Some(e),
+            );
+        }
+    };
+
+    (
+        StatusCode::OK,
+        Json(APIResponse {
+            error: None,
+            response: Some(json!({
+                "nodes": nodes,
+            })),
+        }),
+    )
+}
+
 #[derive(serde::Deserialize)]
 struct DatabaseQueryRunPayload {
     query: String,
@@ -3551,6 +3592,9 @@ fn main() {
             delete(folders_delete),
         )
 
+        //Search
+        .route("/nodes/search", post(nodes_search))
+
         // Misc
         .route("/tokenize", post(tokenize))
         .route("/tokenize/batch", post(tokenize_batch))

core/src/data_sources/node.rs

@@ -78,3 +78,9 @@ impl Node {
         )
     }
 }
+
+impl From<serde_json::Value> for Node {
+    fn from(value: serde_json::Value) -> Self {
+        serde_json::from_value(value).expect("Failed to deserialize Node from JSON value")
+    }
+}

core/src/search_stores/search_store.rs

@@ -3,20 +3,49 @@ use async_trait::async_trait;
 use elasticsearch::{
     auth::Credentials,
     http::transport::{SingleNodeConnectionPool, TransportBuilder},
-    Elasticsearch, IndexParts,
+    Elasticsearch, IndexParts, SearchParts,
 };
 use rand::Rng;
+use serde_json::json;
 use url::Url;
 
 use crate::data_sources::node::Node;
 use crate::{data_sources::data_source::Document, utils};
 use tracing::{error, info};
+
+#[derive(serde::Deserialize)]
+pub struct NodesSearchOptions {
+    limit: Option<usize>,
+    offset: Option<usize>,
+}
+
+#[derive(serde::Deserialize)]
+pub struct DatasourceViewFilter {
+    datasource_id: String,
+    view_filter: Vec<String>,
+}
+
 #[async_trait]
 pub trait SearchStore {
+    async fn search_nodes(
+        &self,
+        query: String,
+        filter: Vec<DatasourceViewFilter>,
+        options: Option<NodesSearchOptions>,
+    ) -> Result<Vec<Node>>;
     async fn index_document(&self, document: &Document) -> Result<()>;
     fn clone_box(&self) -> Box<dyn SearchStore + Sync + Send>;
 }
 
+impl Default for NodesSearchOptions {
+    fn default() -> Self {
+        NodesSearchOptions {
+            limit: Some(10),
+            offset: Some(0),
+        }
+    }
+}
+
 impl Clone for Box<dyn SearchStore + Sync + Send> {
     fn clone(&self) -> Self {
         self.clone_box()
@@ -88,6 +117,64 @@ impl SearchStore for ElasticsearchSearchStore {
         }
     }
 
+    async fn search_nodes(
+        &self,
+        query: String,
+        filter: Vec<DatasourceViewFilter>,
+        options: Option<NodesSearchOptions>,
+    ) -> Result<Vec<Node>> {
+        // First, collect all datasource_ids and their corresponding view_filters
+        let mut filter_conditions = Vec::new();
+        for f in filter {
+            filter_conditions.push(json!({
+                "bool": {
+                    "must": [
+                        { "term": { "data_source_id": f.datasource_id } },
+                        { "terms": { "parents": f.view_filter } }
+                    ]
+                }
+            }));
+        }
+
+        let options = options.unwrap_or_default();
+
+        // then, search
+        match self
+            .client
+            .search(SearchParts::Index(&[NODES_INDEX_NAME]))
+            .from(options.offset.unwrap_or(0) as i64)
+            .size(options.limit.unwrap_or(100) as i64)
+            .body(json!({
+                "query": {
+                    "bool": {
+                        "must": {
+                            "match": {
+                                "title.edge": query
+                            }
+                        },
+                        "should": filter_conditions,
+                        "minimum_should_match": 1
+                    }
+                }
+            }))
+            .send()
+            .await
+        {
+            Ok(response) => {
+                // get nodes from elasticsearch response in hits.hits
+                let response_body = response.json::<serde_json::Value>().await?;
+                let nodes: Vec<Node> = response_body["hits"]["hits"]
+                    .as_array()
+                    .unwrap()
+                    .iter()
+                    .map(|h| Node::from(h.get("source").unwrap().clone()))
+                    .collect();
+                Ok(nodes)
+            }
+            Err(e) => Err(e.into()),
+        }
+    }
+
     fn clone_box(&self) -> Box<dyn SearchStore + Sync + Send> {
         Box::new(self.clone())
     }