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author | Matthias Beyer <mail@beyermatthias.de> | 2016-04-08 23:57:16 +0200 |
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committer | Matthias Beyer <mail@beyermatthias.de> | 2016-04-08 23:57:16 +0200 |
commit | 77fa6d71b3cefefafb0b0416a7ae7dc5e5f8ba36 (patch) | |
tree | aee790039b9393e0a1532f28d63b6972c0549903 /libimaglink | |
parent | 1fc7b6417161bee484744bf7133c3afb5a58cd7b (diff) |
Rewrite internal linking to use StoreId instead of String as Link type
Diffstat (limited to 'libimaglink')
-rw-r--r-- | libimaglink/src/internal.rs | 115 |
1 files changed, 69 insertions, 46 deletions
diff --git a/libimaglink/src/internal.rs b/libimaglink/src/internal.rs index d9732758..4eee600d 100644 --- a/libimaglink/src/internal.rs +++ b/libimaglink/src/internal.rs @@ -1,6 +1,5 @@ use libimagstore::storeid::StoreId; use libimagstore::store::Entry; -use libimagstore::store::EntryHeader; use libimagstore::store::Result as StoreResult; use error::{LinkError, LinkErrorKind}; @@ -8,7 +7,7 @@ use result::Result; use toml::Value; -pub type Link = String; +pub type Link = StoreId; pub trait InternalLinker { @@ -56,59 +55,77 @@ impl InternalLinker for Entry { fn add_internal_link(&mut self, link: &mut Entry) -> Result<()> { let new_link = link.get_location().clone(); - let new_link = new_link.to_str(); - if new_link.is_none() { - return Err(LinkError::new(LinkErrorKind::InternalConversionError, None)); - } - let new_link = new_link.unwrap(); add_foreign_link(link, self.get_location().clone()) .and_then(|_| { self.get_internal_links() .and_then(|mut links| { - links.push(String::from(new_link)); - let links = links.into_iter().map(|s| Value::String(s)).collect(); - let process = self.get_header_mut().set("imag.links", Value::Array(links)); - process_rw_result(process) - .map(|_| ()) + links.push(new_link); + + // try to convert them to str so we can put them back into the header + let links : Vec<Option<Value>> = links + .into_iter() + .map(|s| s.to_str().map(|s| Value::String(String::from(s)))) + .collect(); + + if links.iter().any(|o| o.is_none()) { + // if any type convert failed we fail as well + Err(LinkError::new(LinkErrorKind::InternalConversionError, None)) + } 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(|_| ()) + } }) }) } fn remove_internal_link(&mut self, link: &mut Entry) -> Result<()> { - let own_loc = link.get_location().clone(); - let own_loc = own_loc.to_str(); - if own_loc.is_none() { - return Err(LinkError::new(LinkErrorKind::InternalConversionError, None)); - } - let own_loc = own_loc.unwrap(); - + let own_loc = link.get_location().clone(); let other_loc = link.get_location().clone(); - let other_loc = other_loc.to_str(); - if other_loc.is_none() { - return Err(LinkError::new(LinkErrorKind::InternalConversionError, None)); - } - let other_loc = other_loc.unwrap(); link.get_internal_links() - .and_then(|mut links| { - let links = links.into_iter() + .and_then(|links| { + let links : Vec<Option<Value>> = links.into_iter() .filter(|l| l.clone() != own_loc) - .map(|s| Value::String(s)) + .map(|s| { + match s.to_str() { + Some(s) => Some(Value::String(String::from(s))), + _ => None + } + }) .collect(); - process_rw_result(link.get_header_mut().set("imag.links", Value::Array(links))) - .map(|_| ()) + + 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(|mut links| { - let links = links + .and_then(|links| { + let links : Vec<Option<Value>> = links .into_iter() .filter(|l| l.clone() != other_loc) - .map(|s| Value::String(s)) + .map(|s| { + match s.to_str() { + Some(s) => Some(Value::String(String::from(s))), + _ => None + } + }) .collect(); - process_rw_result(self.get_header_mut().set("imag.links", Value::Array(links))) - .map(|_| ()) + 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(|_| ()) + } }) }) } @@ -118,19 +135,25 @@ impl InternalLinker for Entry { /// When Linking A -> B, the specification wants us to link back B -> A. /// This is a helper function which does this. fn add_foreign_link(target: &mut Entry, from: StoreId) -> Result<()> { - let from = from.to_str(); - if from.is_none() { - debug!("Cannot convert pathbuf '{:?}' to String", from); - return Err(LinkError::new(LinkErrorKind::InternalConversionError, None)); - } - let from = from.unwrap(); - target.get_internal_links() .and_then(|mut links| { - links.push(String::from(from)); - let links = links.into_iter().map(|s| Value::String(s)).collect(); - process_rw_result(target.get_header_mut().set("imag.links", Value::Array(links))) - .map(|_| ()) + links.push(from); + let links : Vec<Option<Value>> = links + .into_iter() + .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(target.get_header_mut().set("imag.links", Value::Array(links))) + .map(|_| ()) + } }) } @@ -149,7 +172,7 @@ fn process_rw_result(links: StoreResult<Option<Value>>) -> Result<Vec<Link>> { let links : Vec<Link> = links.into_iter() .map(|link| { match link { - Value::String(s) => String::from(s), + Value::String(s) => StoreId::from(s), _ => unreachable!(), } }) |