From 402cf5ebbd87b4e4de2d5ba83a97e7f9b014dfc9 Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Wed, 23 May 2018 22:24:30 -0700
Subject: editgroup accept function

---
 rust/src/api_helpers.rs | 68 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 67 insertions(+), 1 deletion(-)

(limited to 'rust/src/api_helpers.rs')

diff --git a/rust/src/api_helpers.rs b/rust/src/api_helpers.rs
index 200b70a8..247eed88 100644
--- a/rust/src/api_helpers.rs
+++ b/rust/src/api_helpers.rs
@@ -3,7 +3,7 @@ use errors::*;
 use diesel;
 use diesel::prelude::*;
 use database_models::*;
-use database_schema::{editgroup, editor};
+use database_schema::*;
 
 pub fn get_or_create_editgroup(editor_id: i64, conn: &PgConnection) -> Result<i64> {
     // check for current active
@@ -26,3 +26,69 @@ pub fn get_or_create_editgroup(editor_id: i64, conn: &PgConnection) -> Result<i6
         Ok(eg_row.id)
     })
 }
+
+pub fn accept_editgroup(editgroup_id: i64, conn: &PgConnection) -> Result<ChangelogRow> {
+    conn.build_transaction().run(|| {
+
+        // check that we haven't accepted already (in changelog)
+        // NB: could leave this to a UNIQUE constraint
+        let count: i64 = changelog::table
+            .filter(changelog::editgroup_id.eq(editgroup_id))
+            .count()
+            .get_result(conn)?;
+        if count > 0 {
+            bail!("editgroup {} has already been accepted", editgroup_id);
+        }
+
+        // for each entity type...
+        //for entity in (container_edit, creator_edit, file_edit, release_edit, work_edit) {
+            /*
+            // This would be the clean and efficient way, but see:
+            // https://github.com/diesel-rs/diesel/issues/1478
+            diesel::update(container_ident::table)
+                .inner_join(container_edit::table.on(
+                    container_ident::id.eq(container_edit::ident_id)
+                ))
+                .filter(container_edit::editgroup_id.eq(editgroup_id))
+                .values((
+                    container_ident::is_live.eq(true),
+                    container_ident::rev_id.eq(container_edit::rev_id),
+                    container_ident::redirect_id.eq(container_edit::redirect_id),
+                ))
+                .execute()?;
+            */
+
+        // Sketchy... but fast? Only a few queries per accept.
+        for entity in ["container", "creator", "file", "work", "release"].iter() {
+            diesel::sql_query(
+                format!("
+                    UPDATE {entity}_ident
+                    SET
+                        is_live = true,
+                        rev_id = {entity}_edit.rev_id,
+                        redirect_id = {entity}_edit.redirect_id
+                    FROM {entity}_edit
+                    WHERE
+                        {entity}_ident.id = {entity}_edit.ident_id
+                        AND {entity}_edit.editgroup_id = $1",
+                    entity = entity))
+                .bind::<diesel::sql_types::BigInt, _>(editgroup_id)
+                .execute(conn)?;
+        }
+
+        // append log/changelog row
+        let entry: ChangelogRow = diesel::insert_into(changelog::table)
+            .values((
+                changelog::editgroup_id.eq(editgroup_id),
+            ))
+            .get_result(conn)?;
+
+        // update any editor's active editgroup
+        let no_active: Option<i64> = None;
+        diesel::update(editor::table)
+            .filter(editor::active_editgroup_id.eq(editgroup_id))
+            .set(editor::active_editgroup_id.eq(no_active))
+            .execute(conn)?;
+        Ok(entry)
+    })
+}
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