Add tag filtering

libimagentryfilter/src/lib.rs

@@ -7,7 +7,16 @@ extern crate toml;
 extern crate libimagstore;
 extern crate libimagtag;
 
+// core functionality modules of the crate,
+// these depend only on libimagstore
+
 pub mod cli;
 pub mod builtin;
 pub mod filter;
 pub mod ops;
+
+// extended functionality of the crate
+// these depend on other internal libraries than libimagstore and use the upper core modules for
+// their functionality
+
+pub mod tags;

libimagentryfilter/src/tags/mod.rs

@@ -0,0 +1,77 @@
+use libimagstore::store::Entry;
+use libimagtag::tagable::Tagable;
+use libimagtag::tag::Tag;
+
+use filter::Filter;
+
+/// Check whether an Entry has a certain tag
+pub struct HasTag {
+    tag: Tag,
+}
+
+impl HasTag {
+
+    pub fn new(tag: Tag) -> HasTag {
+        HasTag {
+            tag: tag,
+        }
+    }
+
+}
+
+impl Filter for HasTag {
+
+    fn filter(&self, e: &Entry) -> bool {
+        e.has_tag(&self.tag).ok().unwrap_or(false)
+    }
+
+}
+
+
+/// Check whether an Entry has all of these tags
+pub struct HasAllTags {
+    tags: Vec<Tag>,
+}
+
+impl HasAllTags {
+
+    pub fn new(tags: Vec<Tag>) -> HasAllTags {
+        HasAllTags {
+            tags: tags,
+        }
+    }
+
+}
+
+impl Filter for HasAllTags {
+
+    fn filter(&self, e: &Entry) -> bool {
+        e.has_tags(&self.tags).ok().unwrap_or(false)
+    }
+
+}
+
+
+/// Check whether an Entry has any of these tags
+pub struct HasAnyTags {
+    tags: Vec<Tag>,
+}
+
+impl HasAnyTags {
+
+    pub fn new(tags: Vec<Tag>) -> HasAnyTags {
+        HasAnyTags {
+            tags: tags,
+        }
+    }
+
+}
+
+impl Filter for HasAnyTags {
+
+    fn filter(&self, e: &Entry) -> bool {
+        self.tags.iter().any(|tag| e.has_tag(tag).ok().unwrap_or(false))
+    }
+
+}
+