From 9db5ffa8429b9df86756379e1f5671a41d8db504 Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Mon, 28 Dec 2015 15:19:32 +0100
Subject: [PATCH] Implement BM::command_remove()

---
 src/module/bm/mod.rs | 104 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 103 insertions(+), 1 deletion(-)

diff --git a/src/module/bm/mod.rs b/src/module/bm/mod.rs
index 07c6e907..ff56e591 100644
--- a/src/module/bm/mod.rs
+++ b/src/module/bm/mod.rs
@@ -6,6 +6,8 @@ use clap::ArgMatches;
 use runtime::Runtime;
 use module::Module;
 
+use storage::file::hash::FileHash;
+use storage::file::id::FileID;
 use storage::parser::FileHeaderParser;
 use storage::parser::Parser;
 use storage::json::parser::JsonHeaderParser;
@@ -77,7 +79,107 @@ impl<'a> BM<'a> {
     }
 
     fn command_remove(&self, matches: &ArgMatches) -> bool {
-        unimplemented!()
+        use std::process::exit;
+
+        let result =
+            if matches.is_present("id") {
+                debug!("Removing by ID (Hash)");
+                let hash = FileHash::from(matches.value_of("id").unwrap());
+                self.remove_by_hash(hash)
+            } else if matches.is_present("tags") {
+                debug!("Removing by tags");
+                let tags = matches.value_of("tags")
+                                  .unwrap()
+                                  .split(",")
+                                  .map(String::from)
+                                  .collect::<Vec<String>>();
+                self.remove_by_tags(tags)
+            } else if matches.is_present("match") {
+                debug!("Removing by match");
+                self.remove_by_match(String::from(matches.value_of("match").unwrap()))
+            } else {
+                error!("Unexpected error. Exiting");
+                exit(1);
+                false
+            };
+
+        if result {
+            info!("Removing succeeded");
+        } else {
+            info!("Removing failed");
+        }
+
+        return result;
+    }
+
+    fn remove_by_hash(&self, hash: FileHash) -> bool {
+        use std::ops::Deref;
+
+        debug!("Removing for hash = '{:?}'", hash);
+        let parser = Parser::new(JsonHeaderParser::new(None));
+
+        let file = self.rt.store().load_by_hash(self, &parser, hash);
+        debug!("file = {:?}", file);
+        file.map(|file| {
+            debug!("File loaded, can remove now: {:?}", file);
+            let f = file.deref().borrow();
+            self.rt.store().remove(f.id().clone())
+        }).unwrap_or(false)
+    }
+
+    fn remove_by_tags(&self, tags: Vec<String>) -> bool {
+        use std::fs::remove_file;
+        use std::ops::Deref;
+        use self::header::get_tags_from_header;
+
+        let parser = Parser::new(JsonHeaderParser::new(None));
+        self.rt
+            .store()
+            .load_for_module(self, &parser)
+            .iter()
+            .filter(|file| {
+                let f = file.deref().borrow();
+                get_tags_from_header(f.header()).iter().any(|tag| {
+                    tags.iter().any(|remtag| remtag == tag)
+                })
+            }).map(|file| {
+                let f = file.deref().borrow();
+                self.rt.store().remove(f.id().clone())
+            }).all(|x| x)
+    }
+
+    fn remove_by_match(&self, matcher: String) -> bool {
+        use self::header::get_url_from_header;
+        use std::fs::remove_file;
+        use std::ops::Deref;
+        use std::process::exit;
+        use regex::Regex;
+
+        let re = Regex::new(&matcher[..]).unwrap_or_else(|e| {
+            error!("Cannot build regex out of '{}'", matcher);
+            error!("{}", e);
+            exit(1);
+        });
+
+        debug!("Compiled '{}' to regex: '{:?}'", matcher, re);
+
+        let parser = Parser::new(JsonHeaderParser::new(None));
+        self.rt
+            .store()
+            .load_for_module(self, &parser)
+            .iter()
+            .filter(|file| {
+                let f   = file.deref().borrow();
+                let url = get_url_from_header(f.header());
+                debug!("url = {:?}", url);
+                url.map(|u| {
+                    debug!("Matching '{}' ~= '{}'", re.as_str(), u);
+                    re.is_match(&u[..])
+                }).unwrap_or(false)
+            }).map(|file| {
+                let f = file.deref().borrow();
+                self.rt.store().remove(f.id().clone())
+            }).all(|x| x)
     }
 
 }