WIP

dbconn/src/dbconn.rs

@@ -1,4 +1,5 @@
 pub mod channelconfig;
+pub mod query;
 pub mod scan;
 pub mod search;
 

dbconn/src/query.rs

@@ -0,0 +1,33 @@
+use crate::create_connection;
+use crate::ErrConv;
+use err::Error;
+use netpod::Channel;
+use netpod::NodeConfigCached;
+
+// For sf-databuffer backend, given a Channel, try to complete the information if only id is given.
+pub async fn sf_databuffer_fetch_channel_by_series(channel: Channel, ncc: &NodeConfigCached) -> Result<Channel, Error> {
+    // TODO should not be needed at some point.
+    if channel.backend().is_empty() || channel.name().is_empty() {
+        let series = channel
+            .series()
+            .ok_or_else(|| Error::with_msg_no_trace("no series id given"))? as i64;
+        let pgcon = create_connection(&ncc.node_config.cluster.database).await?;
+        let mut rows = pgcon
+            .query("select name from channels where rowid = $1", &[&series])
+            .await
+            .err_conv()?;
+        if let Some(row) = rows.pop() {
+            let name: String = row.get(0);
+            let channel = Channel {
+                series: channel.series,
+                backend: ncc.node_config.cluster.backend.clone(),
+                name,
+            };
+            Ok(channel)
+        } else {
+            Err(Error::with_msg_no_trace("can not find series"))
+        }
+    } else {
+        Ok(channel)
+    }
+}