Outsource header utilities into header helper

src/module/bm/header.rs

@@ -1,25 +1,14 @@
-use std::ops::Deref;
+use module::header as headerhelpers;
-
 use storage::file::FileHeaderData as FHD;
 use storage::file::FileHeaderSpec as FHS;
 
 pub fn get_spec() -> FHS {
-    FHS::Map { keys: vec![ url_key(), tags_key() ] }
+    FHS::Map {
+        keys: vec![ headerhelpers::tags::spec::url_key(),
+                    headerhelpers::tags::spec::tags_key() ]
+    }
 }
 
-fn url_key() -> FHS {
-    FHS::Key { name: String::from("URL"), value_type: Box::new(FHS::Text) }
-}
-
-fn tags_key() -> FHS {
-    FHS::Key { name: String::from("TAGS"), value_type: Box::new(text_array()) }
-}
-
-fn text_array() -> FHS {
-    FHS::Array { allowed_types: vec![FHS::Text] }
-}
-
-
 pub fn build_header(url: &String, tags: &Vec<String>) -> FHD {
     FHD::Map {
         keys: vec![
@@ -29,52 +18,13 @@ pub fn build_header(url: &String, tags: &Vec<String>) -> FHD {
             },
             FHD::Key {
                 name: String::from("TAGS"),
-                value: Box::new(build_tag_array(tags))
+                value: Box::new(headerhelpers::tags::data::build_tag_array(tags))
             }
         ]
     }
 }
 
-fn build_tag_array(tags: &Vec<String>) -> FHD {
-    let texttags = tags.into_iter().map(|t| FHD::Text(t.clone())).collect();
-    FHD::Array { values: Box::new(texttags) }
-}
-
 pub fn get_tags_from_header(header: &FHD) -> Vec<String> {
-    let mut tags : Vec<String> = vec![];
+    headerhelpers::tags::data::get_tags_from_header(header)
-
-    fn match_array(a: &Box<FHD>) -> Vec<String> {
-        let mut tags : Vec<String> = vec![];
-
-        match a.deref() {
-            &FHD::Array{values: ref vs} => {
-                let values : Vec<FHD> = vs.deref().clone();
-                for value in values {
-                    match value {
-                        FHD::Text(t) => tags.push(t),
-                        _ => warn!("Malformed Header Data: Expected Text, found non-Text"),
-                    }
-                }
-            }
-            _ => warn!("Malformed Header Data: Expected Array, found non-Array"),
-        }
-
-        tags
-    }
-
-    match header {
-        &FHD::Map{keys: ref ks} => {
-            let keys : Vec<FHD> = ks.clone();
-            for key in keys {
-                match key {
-                    FHD::Key{name: _, value: ref v} => return match_array(v),
-                    _ => warn!("Malformed Header Data: Expected Key, found non-Key"),
-                }
-            }
-        },
-        _ => warn!("Malformed Header Data: Expected Map, found non-Map"),
-    }
-
-    tags
 }
 

src/module/header/mod.rs

@@ -0,0 +1,6 @@
+/*
+ * Helpers for headers
+ */
+
+pub mod tags;
+

src/module/header/tags.rs

@@ -0,0 +1,71 @@
+/*
+ * Helpers for headers - Tags
+ */
+
+pub mod spec {
+    use storage::file::FileHeaderSpec as FHS;
+
+    pub fn url_key() -> FHS {
+        FHS::Key { name: String::from("URL"), value_type: Box::new(FHS::Text) }
+    }
+
+    pub fn tags_key() -> FHS {
+        FHS::Key { name: String::from("TAGS"), value_type: Box::new(text_array()) }
+    }
+
+    pub fn text_array() -> FHS {
+        FHS::Array { allowed_types: vec![FHS::Text] }
+    }
+
+}
+
+pub mod data {
+    use std::ops::Deref;
+    use storage::file::FileHeaderData as FHD;
+
+    pub fn build_tag_array(tags: &Vec<String>) -> FHD {
+        let texttags = tags.into_iter().map(|t| FHD::Text(t.clone())).collect();
+        FHD::Array { values: Box::new(texttags) }
+    }
+
+    pub fn get_tags_from_header(header: &FHD) -> Vec<String> {
+        let mut tags : Vec<String> = vec![];
+
+        fn match_array(a: &Box<FHD>) -> Vec<String> {
+            let mut tags : Vec<String> = vec![];
+
+            match a.deref() {
+                &FHD::Array{values: ref vs} => {
+                    let values : Vec<FHD> = vs.deref().clone();
+                    for value in values {
+                        match value {
+                            FHD::Text(t) => tags.push(t),
+                            _ => warn!("Malformed Header Data: Expected Text, found non-Text"),
+                        }
+                    }
+                }
+                _ => warn!("Malformed Header Data: Expected Array, found non-Array"),
+            }
+
+            tags
+        }
+
+        match header {
+            &FHD::Map{keys: ref ks} => {
+                let keys : Vec<FHD> = ks.clone();
+                for key in keys {
+                    match key {
+                        FHD::Key{name: _, value: ref v} => return match_array(v),
+                        _ => warn!("Malformed Header Data: Expected Key, found non-Key"),
+                    }
+                }
+            },
+            _ => warn!("Malformed Header Data: Expected Map, found non-Map"),
+        }
+
+        tags
+    }
+
+
+}
+

src/module/mod.rs

@@ -10,6 +10,7 @@ use runtime::Runtime;
 use storage::backend::StorageBackend;
 
 pub mod bm;
+pub mod header;
 
 #[derive(Debug)]
 pub struct ModuleError {