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Refactor common pattern into function

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This commit is contained in:
Matthias Beyer 2016-04-09 00:07:30 +02:00
parent 77fa6d71b3
commit 8d9d6651fb
1 changed files with 23 additions and 51 deletions
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84
libimaglink/src/internal.rs
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@ -1,5 +1,6 @@
use libimagstore::storeid::StoreId;
use libimagstore::store::Entry;
use libimagstore::store::EntryHeader;
use libimagstore::store::Result as StoreResult;
use error::{LinkError, LinkErrorKind};
@ -61,8 +62,32 @@ impl InternalLinker for Entry {
self.get_internal_links()
.and_then(|mut links| {
links.push(new_link);
rewrite_links(self.get_header_mut(), links)
})
})
}
// try to convert them to str so we can put them back into the header
fn remove_internal_link(&mut self, link: &mut Entry) -> Result<()> {
let own_loc = link.get_location().clone();
let other_loc = link.get_location().clone();
link.get_internal_links()
.and_then(|links| {
let links = links.into_iter().filter(|l| l.clone() != own_loc).collect();
rewrite_links(self.get_header_mut(), links)
})
.and_then(|_| {
self.get_internal_links()
.and_then(|links| {
let links = links.into_iter().filter(|l| l.clone() != other_loc).collect();
rewrite_links(link.get_header_mut(), links)
})
})
}
}
fn rewrite_links(header: &mut EntryHeader, links: Vec<StoreId>) -> Result<()> {
let links : Vec<Option<Value>> = links
.into_iter()
.map(|s| s.to_str().map(|s| Value::String(String::from(s))))
@ -74,62 +99,9 @@ impl InternalLinker for Entry {
} else {
// I know it is ugly
let links = links.into_iter().map(|opt| opt.unwrap()).collect();
let process = self.get_header_mut().set("imag.links", Value::Array(links));
process_rw_result(process)
.map(|_| ())
let process = header.set("imag.links", Value::Array(links));
process_rw_result(process).map(|_| ())
}
})
})
}
fn remove_internal_link(&mut self, link: &mut Entry) -> Result<()> {
let own_loc = link.get_location().clone();
let other_loc = link.get_location().clone();
link.get_internal_links()
.and_then(|links| {
let links : Vec<Option<Value>> = links.into_iter()
.filter(|l| l.clone() != own_loc)
.map(|s| {
match s.to_str() {
Some(s) => Some(Value::String(String::from(s))),
_ => None
}
})
.collect();
if links.iter().any(|o| o.is_none()) {
Err(LinkError::new(LinkErrorKind::InternalConversionError, None))
} else {
let links = links.into_iter().map(|opt| opt.unwrap()).collect();
process_rw_result(self.get_header_mut().set("imag.links", Value::Array(links)))
.map(|_| ())
}
})
.and_then(|_| {
self.get_internal_links()
.and_then(|links| {
let links : Vec<Option<Value>> = links
.into_iter()
.filter(|l| l.clone() != other_loc)
.map(|s| {
match s.to_str() {
Some(s) => Some(Value::String(String::from(s))),
_ => None
}
})
.collect();
if links.iter().any(|o| o.is_none()) {
Err(LinkError::new(LinkErrorKind::InternalConversionError, None))
} else {
let links = links.into_iter().map(|opt| opt.unwrap()).collect();
process_rw_result(link.get_header_mut().set("imag.links", Value::Array(links)))
.map(|_| ())
}
})
})
}
}
/// When Linking A -> B, the specification wants us to link back B -> A.