feat: create date api and dynamo context

The DynamoClient context should be used across the entire application - there are some significant performance improvements when under real load.

src/pages/api/dates.rs

@@ -0,0 +1,75 @@
+use std::collections::HashMap;
+use leptos::logging::log;
+use leptos::prelude::*;
+use crate::common::DateInfo;
+
+#[cfg(feature = "ssr")]
+static DATES_TABLE: &str = "leptos-dates";
+
+#[cfg(feature = "ssr")]
+use aws_sdk_dynamodb::{
+    types::{WriteRequest, PutRequest},
+    Client as DynamoClient
+};
+
+#[cfg(feature = "ssr")]
+use std::sync::Arc;
+
+#[server]
+pub async fn create_dates(dates: Vec<DateInfo>) -> Result<(), ServerFnError> {
+    // Serialize and put dates into the database.
+    let client = expect_context::<Arc<DynamoClient>>();
+    
+    log!("Creating dates: {:?}", dates);
+    
+    let requests = dates
+        .into_iter()
+        .map(|date| {
+            let item = serde_dynamo::to_item(&date)
+                .unwrap_or_default();
+            
+            let put_request = PutRequest::builder()
+                .set_item(Some(item))
+                .build()
+                .expect("Couldn't build request, item is not present");
+            
+            WriteRequest::builder().put_request(put_request).build()
+        })
+        .collect::<Vec<WriteRequest>>();
+    
+    let mut request_map = HashMap::new();
+    request_map.insert(DATES_TABLE.to_string(), requests);
+    
+    client
+        .batch_write_item()
+        .set_request_items(Some(request_map))
+        .send()
+        .await
+        .map(|_| ())
+        .map_err(ServerFnError::from)
+}
+
+#[server]
+pub async fn get_important_dates() -> Result<Vec<DateInfo>, ServerFnError> {
+    let client = expect_context::<Arc<DynamoClient>>();
+    
+    client
+        .scan()
+        .table_name(DATES_TABLE)
+        .send()
+        .await
+        .map(|output| {
+            if let Some(items) = output.items {
+                items
+                    .into_iter()
+                    .filter_map(|item| {
+                        serde_dynamo::from_item::<_, DateInfo>(item)
+                            .ok()
+                    })
+                    .collect::<Vec<DateInfo>>()
+            } else {
+                Vec::new()
+            }
+        })
+        .map_err(ServerFnError::from)
+}