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use std::collections::HashMap;
use std::fs;
use std::io;
use std::path::{Path, PathBuf};
use structopt::StructOpt;
use serde::{Serialize, Deserialize};
use tera::{Tera, Filter, Value};
const TMPL_FILES: &'static [&'static str] = &["index.html"];
#[derive(Debug, StructOpt, Serialize)]
#[structopt(name = "gallery")]
pub struct Options {
#[structopt(long, help = "Just a thing")]
pub check: bool,
#[structopt(short, long, help = "Config file location")]
pub config: Option<PathBuf>,
#[structopt(help = "Picture location")]
pub load: PathBuf,
#[structopt(short, long, default_value = "png", help = "Image extension to use for converted files")]
pub ext: String,
#[structopt(long, short, default_value = "build", help = "Where to build site")]
pub builddir: PathBuf,
#[structopt(long, help = "Full size url prefix")]
pub url_prefix: Option<String>,
}
#[derive(Debug, thiserror::Error)]
pub enum ConfigError {
#[error("reading from file")]
Reading {
#[from]
source: io::Error,
},
#[error("parsing config file")]
Parsing {
#[from]
source: serde_yaml::Error,
},
#[error("compiling glob pattern")]
CompilePattern {
#[from]
source: glob::PatternError,
},
#[error("compiling templates")]
CompileTemplate {
#[from]
source: tera::Error,
},
}
#[derive(Deserialize, Debug, Serialize)]
pub struct Config {
pub imageglob: String,
pub info: HashMap<String, String>,
pub sizes: HashMap<String, u32>,
#[serde(skip)]
pub imageglob_compiled: glob::Pattern,
}
struct ReltoFilter {
dir: PathBuf,
}
#[derive(Debug)]
pub struct Context {
pub options: Options,
pub config: Config,
pub imgdir: PathBuf,
pub tmpl: Tera,
}
impl Context {
pub fn new_with_args() -> Result<Context, ConfigError> {
let opts = Options::from_args();
let config = Config::load_with_options(&opts)?;
let imgdir = opts.builddir.join("imgs");
// Create img dir
if let Err(err) = fs::create_dir(&imgdir) {
if err.kind() != io::ErrorKind::AlreadyExists {
return Err(ConfigError::from(err));
}
}
// Compile templates
let mut tera = Tera::default();
let tmpl_dir = opts.load.join("templates");
TMPL_FILES.iter().map(|fname| -> Result<(), ConfigError> {
let path = tmpl_dir.join(fname);
tera.add_template_file(path, Some(fname))?;
Ok(())
}).collect::<Result<(), ConfigError>>()?;
tera.register_filter("relto_build", ReltoFilter::new(&opts.builddir));
Ok(Context {
options: opts,
config: config,
imgdir: imgdir,
tmpl: tera,
})
}
pub fn get_image_files(&self) -> Result<Vec<PathBuf>, io::Error> {
let files = fs::read_dir(&self.options.load)?
// Remove errored entries (SILENTLY)
.filter(|entry| entry.is_ok())
.map(|entry| entry.unwrap().path())
// Filter out directories and files that do not match pattern
.filter(|path| path.file_name()
.map_or(false, |file| self.config.imageglob_compiled.matches(file.to_str().unwrap()))
)
.collect();
Ok(files)
}
}
impl ReltoFilter {
pub fn new(dir: &Path) -> Self {
ReltoFilter {
dir: dir.to_path_buf(),
}
}
}
impl Filter for ReltoFilter {
fn filter(&self, value: &Value, _: &HashMap<String, tera::Value>) -> tera::Result<Value> {
if let Value::String(path) = value {
let path = PathBuf::from(path);
match path.strip_prefix(&self.dir) {
Ok(relto) => Ok(Value::String(relto.to_string_lossy().to_string())),
Err(err) => Err(tera::Error::call_filter("relto", err)),
}
} else {
Err(tera::Error::msg("Input to relto filter must be string"))
}
}
}
impl Config {
fn load_from_file(path: &PathBuf) -> Result<Config, ConfigError> {
let content = fs::read_to_string(path)?;
let mut config: Config = serde_yaml::from_str(&content)?;
config.imageglob_compiled = glob::Pattern::new(&config.imageglob)?;
Ok(config)
}
pub fn load_with_options(opts: &Options) -> Result<Config, ConfigError> {
let config_path = match &opts.config {
Some(path) => path.to_path_buf(),
None => opts.load.join("imginfo.yml"),
};
Config::load_from_file(&config_path)
}
}
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