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use failure::{self, ResultExt};
use std::{env, fs, path::PathBuf};
pub fn get_stamp_value(
key: impl AsRef<str>,
json: &serde_json::Value,
) -> Result<String, failure::Error> {
json.get(key.as_ref())
.and_then(|value| value.as_str().map(ToOwned::to_owned))
.ok_or_else(|| {
failure::err_msg(format!("cannot get stamp value for key '{}'", key.as_ref()))
})
}
pub fn save_stamp_value(
key: impl Into<String>,
value: impl AsRef<str>,
) -> Result<(), failure::Error> {
let mut json = read_stamps_file_to_json().unwrap_or_else(|_| serde_json::Map::new().into());
{
let stamps = json
.as_object_mut()
.ok_or_else(|| failure::err_msg("stamps file doesn't contain JSON object"))?;
stamps.insert(key.into(), value.as_ref().into());
}
write_to_stamps_file(json)
}
pub fn get_stamps_file_path() -> Result<PathBuf, failure::Error> {
let path = env::current_exe()
.map(|path| path.with_extension("stamps"))
.context("cannot get stamps file path")?;
Ok(path)
}
pub fn read_stamps_file_to_json() -> Result<serde_json::Value, failure::Error> {
let stamps_file_path = get_stamps_file_path()?;
let stamps_file_content =
fs::read_to_string(stamps_file_path).context("cannot find or read stamps file")?;
let json: serde_json::Value = serde_json::from_str(&stamps_file_content)
.context("stamps file doesn't contain valid JSON")?;
Ok(json)
}
fn write_to_stamps_file(json: serde_json::Value) -> Result<(), failure::Error> {
let stamps_file_path = get_stamps_file_path()?;
let pretty_json = serde_json::to_string_pretty(&json).context("JSON serialization failed")?;
fs::write(stamps_file_path, pretty_json).context("cannot write to stamps file")?;
Ok(())
}