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use std::default::Default;
use std::io::stdout;
use std::io::Write;
use libimagentrylist::lister::Lister;
use libimagentrylist::result::Result;
use libimagerror::trace::trace_error;
use libimagstore::store::FileLockEntry;
use libimagerror::into::IntoError;
use libimagentrylist::error::ListErrorKind as LEK;
use reference::Ref;
use error::MapErrInto;
use error::RefErrorKind as REK;
pub struct RefLister {
check_dead: bool,
check_changed: bool,
check_changed_content: bool,
check_changed_permiss: bool,
}
impl RefLister {
pub fn new() -> RefLister {
RefLister::default()
}
pub fn check_dead(mut self, b: bool) -> RefLister {
self.check_dead = b;
self
}
pub fn check_changed(mut self, b: bool) -> RefLister {
self.check_changed = b;
self
}
pub fn check_changed_content(mut self, b: bool) -> RefLister {
self.check_changed_content = b;
self
}
pub fn check_changed_permiss(mut self, b: bool) -> RefLister {
self.check_changed_permiss = b;
self
}
}
impl Default for RefLister {
fn default() -> RefLister {
RefLister {
check_dead: false,
check_changed: false,
check_changed_content: false,
check_changed_permiss: false,
}
}
}
impl Lister for RefLister {
fn list<'b, I: Iterator<Item = FileLockEntry<'b>>>(&self, entries: I) -> Result<()> {
debug!("Called list()");
let (r, n) = entries.fold((Ok(()), 0), |(accu, i), entry| {
debug!("fold({:?}, {:?})", accu, entry);
let r = accu.and_then(|_| {
debug!("Listing Entry: {:?}", entry);
lister_fn(entry,
self.check_dead,
self.check_changed,
self.check_changed_content,
self.check_changed_permiss)
.and_then(|s| {
write!(stdout(), "{}\n", s)
.map_err(Box::new)
.map_err(|e| LEK::FormatError.into_error_with_cause(e))
})
.map_err_into(REK::RefToDisplayError)
})
.map(|_| ());
(r, i + 1)
});
debug!("Iterated over {} entries", n);
r.map_err(|e| LEK::FormatError.into_error_with_cause(Box::new(e)))
}
}
fn lister_fn(fle: FileLockEntry,
do_check_dead: bool,
do_check_changed: bool,
do_check_changed_content: bool,
do_check_changed_permiss: bool) -> Result<String>
{
Ref::from_filelockentry(fle)
.map(|r| {
let is_dead = if do_check_dead {
if check_dead(&r) { "dead" } else { "alive" }
} else {
"not checked"
};
let is_changed = if do_check_changed {
if check_changed(&r) { "changed" } else { "unchanged" }
} else {
"not checked"
};
let is_changed_content = if do_check_changed_content {
if check_changed_content(&r) { "changed" } else { "unchanged" }
} else {
"not checked"
};
let is_changed_permiss = if do_check_changed_permiss {
if check_changed_permiss(&r) { "changed" } else { "unchanged" }
} else {
"not checked"
};
format!("{} | {} | {} | {} | {} | {}",
is_dead,
is_changed,
is_changed_content,
is_changed_permiss,
r.get_path_hash().unwrap_or_else(|_| String::from("Cannot get hash")),
r.get_location())
})
.map_err(|e| LEK::FormatError.into_error_with_cause(Box::new(e)))
}
fn check_dead(r: &Ref) -> bool {
match r.fs_link_exists() {
Ok(b) => b,
Err(e) => {
warn!("Could not check whether the ref {} exists on the FS:", r);
trace_error(&e);
true
},
}
}
fn check_changed(r: &Ref) -> bool {
check_changed_content(r) && check_changed_permiss(r)
}
fn check_changed_content(r: &Ref) -> bool {
let eq = r.get_current_hash()
.and_then(|hash| r.get_stored_hash().map(|stored| (hash, stored)))
.map(|(hash, stored)| hash == stored);
match eq {
Ok(eq) => eq,
Err(e) => {
warn!("Could not check whether the ref {} changed on the FS:", r);
trace_error(&e);
false
},
}
}
fn check_changed_permiss(_: &Ref) -> bool {
warn!("Permission changes tracking not supported yet.");
false
}