Implement POST /indexes-swap

meilisearch-http/src/routes/indexes_swap.rs

@@ -0,0 +1,77 @@
+use std::collections::HashSet;
+
+use crate::extractors::authentication::{policies::*, GuardedData};
+use crate::extractors::sequential_extractor::SeqHandler;
+use crate::routes::tasks::TaskView;
+use actix_web::web::Data;
+use actix_web::{web, HttpResponse};
+use index_scheduler::IndexScheduler;
+use meilisearch_types::error::{Code, ResponseError};
+use meilisearch_types::tasks::KindWithContent;
+use serde::Deserialize;
+
+pub fn configure(cfg: &mut web::ServiceConfig) {
+    cfg.service(web::resource("").route(web::post().to(SeqHandler(indexes_swap))));
+}
+
+// TODO: Lo: revisit this struct once we have decided on what the payload should be
+#[derive(Deserialize, Debug, Clone, PartialEq, Eq)]
+#[serde(rename_all = "camelCase", deny_unknown_fields)]
+pub struct IndexesSwapPayload {
+    indexes: (String, String),
+}
+
+pub async fn indexes_swap(
+    index_scheduler: GuardedData<ActionPolicy<{ actions::INDEXES_SWAP }>, Data<IndexScheduler>>,
+    params: web::Json<Vec<IndexesSwapPayload>>,
+) -> Result<HttpResponse, ResponseError> {
+    let search_rules = &index_scheduler.filters().search_rules;
+
+    // TODO: Lo: error when the params are empty
+    // TODO: Lo: error when the same index appears more than once
+    // TODO: Lo: error when not authorized to swap
+
+    let mut swaps = vec![];
+    let mut indexes_set = HashSet::<String>::default();
+    for IndexesSwapPayload {
+        indexes: (lhs, rhs),
+    } in params.into_inner().into_iter()
+    {
+        if !search_rules.is_index_authorized(&lhs) || !search_rules.is_index_authorized(&lhs) {
+            return Err(ResponseError::from_msg(
+                "TODO: error message when we swap with an index were not allowed to access"
+                    .to_owned(),
+                Code::BadRequest,
+            ));
+        }
+        swaps.push((lhs.clone(), rhs.clone()));
+        // TODO: Lo: should this check be here or within the index scheduler?
+        let is_unique_index_lhs = indexes_set.insert(lhs);
+        if !is_unique_index_lhs {
+            return Err(ResponseError::from_msg(
+                "TODO: error message when same index is in more than one swap".to_owned(),
+                Code::BadRequest,
+            ));
+        }
+        let is_unique_index_rhs = indexes_set.insert(rhs);
+        if !is_unique_index_rhs {
+            return Err(ResponseError::from_msg(
+                "TODO: error message when same index is in more than one swap".to_owned(),
+                Code::BadRequest,
+            ));
+        }
+    }
+    if swaps.is_empty() {
+        return Err(ResponseError::from_msg(
+            "TODO: error message when swaps is empty".to_owned(),
+            Code::BadRequest,
+        ));
+    }
+
+    let task = KindWithContent::IndexSwap { swaps };
+
+    let task = index_scheduler.register(task)?;
+    let task_view = TaskView::from_task(&task);
+
+    Ok(HttpResponse::Accepted().json(task_view))
+}