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use itertools::Itertools;
use libimagstore::store::Entry;
use libimagerror::errors::ErrorMsg as EM;
use toml_query::read::TomlValueReadExt;
use toml_query::insert::TomlValueInsertExt;
use failure::Error;
use failure::ResultExt;
use failure::Fallible as Result;
use failure::err_msg;
use tag::{Tag, TagSlice};
use tag::is_tag_str;
use toml::Value;
pub trait Tagable {
fn get_tags(&self) -> Result<Vec<Tag>>;
fn set_tags(&mut self, ts: &[Tag]) -> Result<()>;
fn add_tag(&mut self, t: Tag) -> Result<()>;
fn remove_tag(&mut self, t: Tag) -> Result<()>;
fn has_tag(&self, t: TagSlice) -> Result<bool>;
fn has_tags(&self, ts: &[Tag]) -> Result<bool>;
}
impl Tagable for Value {
fn get_tags(&self) -> Result<Vec<Tag>> {
self.read("tag.values")
.map_err(Error::from)
.context(EM::EntryHeaderReadError)?
.map(|val| {
debug!("Got Value of tags...");
val.as_array()
.map(|tags| {
debug!("Got Array<T> of tags...");
if !tags.iter().all(|t| is_match!(*t, Value::String(_))) {
return Err(format_err!("Tag type error: Got Array<T> where T is not a String: {:?}", tags));
}
debug!("Got Array<String> of tags...");
if tags.iter().any(|t| match *t {
Value::String(ref s) => !is_tag_str(s).is_ok(),
_ => unreachable!()})
{
return Err(format_err!("At least one tag is not a valid tag string"));
}
Ok(tags.iter()
.cloned()
.map(|t| {
match t {
Value::String(s) => s,
_ => unreachable!(),
}
})
.collect())
})
.unwrap_or(Ok(vec![]))
})
.unwrap_or(Ok(vec![]))
}
fn set_tags(&mut self, ts: &[Tag]) -> Result<()> {
if ts.iter().any(|tag| !is_tag_str(tag).is_ok()) {
let not_tag = ts.iter().filter(|t| !is_tag_str(t).is_ok()).next().unwrap();
return Err(format_err!("Not a tag: '{}'", not_tag));
}
let a = ts.iter().unique().map(|t| Value::String(t.clone())).collect();
debug!("Setting tags = {:?}", a);
self.insert("tag.values", Value::Array(a))
.map(|_| ())
.map_err(|_| Error::from(EM::EntryHeaderWriteError))
}
fn add_tag(&mut self, t: Tag) -> Result<()> {
if !is_tag_str(&t).map(|_| true)
.map_err(|s| format_err!("{}", s))
.context(err_msg("Not a tag"))?
{
return Err(format_err!("Not a tag: '{}'", t));
}
self.get_tags()
.map(|mut tags| {
debug!("Pushing tag = {:?} to list = {:?}", t, tags);
tags.push(t);
self.set_tags(&tags.into_iter().unique().collect::<Vec<_>>()[..])
})
.map(|_| ())
}
fn remove_tag(&mut self, t: Tag) -> Result<()> {
if !is_tag_str(&t).map(|_| true)
.map_err(|s| format_err!("{}", s))
.context(err_msg("Not a tag"))?
{
debug!("Not a tag: '{}'", t);
return Err(format_err!("Not a tag: '{}'", t));
}
self.get_tags()
.map(|mut tags| {
tags.retain(|tag| tag.clone() != t);
self.set_tags(&tags[..])
})
.map(|_| ())
}
fn has_tag(&self, t: TagSlice) -> Result<bool> {
let tags = self.read("tag.values").context(EM::EntryHeaderReadError)?;
if !tags.iter().all(|t| is_match!(*t, &Value::String(_))) {
return Err(err_msg("Tag type error"))
}
Ok(tags
.iter()
.any(|tag| {
match *tag {
&Value::String(ref s) => { s == t },
_ => unreachable!()
}
}))
}
fn has_tags(&self, tags: &[Tag]) -> Result<bool> {
let mut result = true;
for tag in tags {
result = result && self.has_tag(tag)?;
}
Ok(result)
}
}
impl Tagable for Entry {
fn get_tags(&self) -> Result<Vec<Tag>> {
self.get_header().get_tags()
}
fn set_tags(&mut self, ts: &[Tag]) -> Result<()> {
self.get_header_mut().set_tags(ts)
}
fn add_tag(&mut self, t: Tag) -> Result<()> {
self.get_header_mut().add_tag(t)
}
fn remove_tag(&mut self, t: Tag) -> Result<()> {
self.get_header_mut().remove_tag(t)
}
fn has_tag(&self, t: TagSlice) -> Result<bool> {
self.get_header().has_tag(t)
}
fn has_tags(&self, ts: &[Tag]) -> Result<bool> {
self.get_header().has_tags(ts)
}
}