libdeadmock 0.1.6

API Mocking and Virtualization
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// Copyright (c) 2018 libdeadmock developers
//
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> or the MIT
// license <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. All files in the project carrying such notice may not be copied,
// modified, or distributed except according to those terms.

//! `libdeadmock` request/response mappings
use clap::ArgMatches;
use crate::config::Mapping;
use crate::error::ErrorKind::MappingKeyCollision;
use crate::util;
use failure::Error;
use getset::Getters;
use serde_derive::{Deserialize, Serialize};
use std::collections::HashMap;
use std::convert::TryFrom;
use std::fs::File;
use std::io::{BufReader, Read};
use std::path::PathBuf;
use toml;
use uuid::Uuid;

/// A map of `Mappings`.   Each is stored by `Uuid`.
#[derive(Clone, Debug, Default, Deserialize, Eq, Getters, PartialEq, Serialize)]
pub struct Mappings {
    /// The private inner hashmap.
    #[get = "pub"]
    inner: HashMap<Uuid, Mapping>,
}

impl<'a> TryFrom<&'a ArgMatches<'a>> for Mappings {
    type Error = Error;

    fn try_from(matches: &'a ArgMatches<'_>) -> Result<Self, Error> {
        let mut mappings = Self::default();

        let mappings_path = if let Some(mappings_path) = matches.value_of("mappings_path") {
            PathBuf::from(mappings_path).join("mappings")
        } else {
            PathBuf::from("mappings")
        };

        util::visit_dirs(&mappings_path, &mut |entry| -> Result<(), Error> {
            let f = File::open(entry.path())?;
            let mut reader = BufReader::new(f);
            let mut buffer = Vec::new();
            let _bytes_read = reader.read_to_end(&mut buffer)?;
            let mapping: Mapping = toml::from_slice(&buffer)?;
            if let Some(_v) = mappings.inner.insert(Uuid::new_v4(), mapping) {
                Err(MappingKeyCollision.into())
            } else {
                Ok(())
            }
        })?;
        Ok(mappings)
    }
}

#[cfg(test)]
crate mod test {
    use super::Mappings;
    use clap::{App, Arg};
    use failure::Error;
    use std::convert::TryFrom;

    crate fn test_mappings() -> Result<Mappings, Error> {
        let args = vec!["test", "-m", "tests"];

        let matches = App::new(env!("CARGO_PKG_NAME"))
            .version(env!("CARGO_PKG_VERSION"))
            .author(env!("CARGO_PKG_AUTHORS"))
            .about("Proxy server for hosting mocked responses on match criteria")
            .arg(
                Arg::with_name("mappings_path")
                    .short("m")
                    .long("mappings_path")
                    .takes_value(true)
                    .value_name("MAPPINGS_PATH"),
            )
            .get_matches_from(args);

        Ok(Mappings::try_from(&matches)?)
    }
}