Add link-verify store hook

libimagstorestdhook/src/lib.rs

@@ -24,4 +24,5 @@ extern crate libimagutil;
 
 pub mod debug;
 pub mod flock;
+pub mod linkverify;
 

libimagstorestdhook/src/linkverify.rs

@@ -0,0 +1,75 @@
+use std::path::PathBuf;
+
+use toml::Value;
+
+use libimagstore::hook::Hook;
+use libimagstore::hook::accessor::HookDataAccessor as HDA;
+use libimagstore::hook::accessor::HookDataAccessorProvider;
+use libimagstore::hook::accessor::NonMutableHookDataAccessor;
+use libimagstore::hook::result::HookResult;
+use libimagstore::store::FileLockEntry;
+use libimagentrylink::internal::InternalLinker;
+use libimagutil::trace::trace_error;
+
+#[derive(Debug, Clone)]
+pub struct LinkedEntriesExistHook {
+    store_location: PathBuf,
+}
+
+impl LinkedEntriesExistHook {
+
+    pub fn new(store_location: PathBuf) -> LinkedEntriesExistHook {
+        LinkedEntriesExistHook {
+            store_location: store_location,
+        }
+    }
+
+}
+
+impl Hook for LinkedEntriesExistHook {
+
+    fn name(&self) -> &'static str {
+        "stdhook_linked_entries_exist"
+    }
+
+    fn set_config(&mut self, _: &Value) {
+        () // We are not configurable here.
+    }
+
+}
+
+impl HookDataAccessorProvider for LinkedEntriesExistHook {
+
+    fn accessor(&self) -> HDA {
+        HDA::NonMutableAccess(self)
+    }
+
+}
+
+impl NonMutableHookDataAccessor for LinkedEntriesExistHook {
+
+    fn access(&self, fle: &FileLockEntry) -> HookResult<()> {
+        debug!("[LINKVERIFY HOOK] {:?}", fle.get_location());
+        let _ = fle.get_internal_links()
+            .map(|links| {
+                for link in links {
+                    let mut path = self.store_location.clone();
+                    path.push(link);
+                    if !path.exists() {
+                        warn!("File link does not exist: {:?} -> {:?}", fle.get_location(), path);
+                    } else {
+                        if !path.is_file() {
+                            warn!("File link is not a file: {:?} -> {:?}", fle.get_location(), path);
+                        }
+                    }
+                }
+            })
+            .map_err(|e| {
+                warn!("Couldn't execute Link-Verify hook");
+                trace_error(&e);
+            });
+        Ok(())
+    }
+
+}
+