Initial import

In the beginning there was darkness.
So I spoke "git init".
And there was a git repository.

1 files changed, 40 insertions, 0 deletions

diff --git a/src/frontend/mod.rs b/src/frontend/mod.rs
new file mode 100644
index 0000000..41ab972
--- /dev/null
+++ b/src/frontend/mod.rs
@@ -0,0 +1,40 @@
+use clap::ArgMatches;
+use failure::Fallible as Result;
+
+use librepology::v1::types::*;
+
+use crate::config::Configuration;
+use crate::frontend::list::ListFrontend;
+use crate::frontend::json::JsonFrontend;
+use crate::frontend::table::TableFrontend;
+
+pub trait Frontend {
+    fn list_packages(&self, packages: Vec<Package>) -> Result<()>;
+    fn list_problems(&self, problems: Vec<Problem>) -> Result<()>;
+}
+
+pub mod list;
+pub mod json;
+pub mod table;
+
+pub fn new_frontend(app: &ArgMatches, _config: &Configuration) -> Result<Box<Frontend>> {
+    match app.value_of("output") {
+        None | Some("lines") => {
+            debug!("No output specified, using default");
+            Ok(Box::new(ListFrontend::new(::std::io::stdout())))
+        },
+
+        Some("json") => {
+            debug!("Using JSON Frontend");
+            Ok(Box::new(JsonFrontend::new(::std::io::stdout())))
+        },
+
+        Some("table") => {
+            debug!("Using table Frontend");
+            Ok(Box::new(TableFrontend::new(::std::io::stdout())))
+        },
+
+        Some(other) => Err(format_err!("Unknown Frontend '{}'", other)),
+    }
+
+}