rustyroad 1.0.29

Rusty Road is a framework written in Rust that is based on Ruby on Rails. It is designed to provide the familiar conventions and ease of use of Ruby on Rails, while also taking advantage of the performance and efficiency of Rust.
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use super::error::MigrationValidationError;
use super::model::MigrationFile;
use std::fs::DirEntry;

pub(super) fn load(directory: DirEntry) -> Result<MigrationFile, MigrationValidationError> {
    let name = directory
        .file_name()
        .into_string()
        .map_err(|_| MigrationValidationError::new("Invalid migration directory name"))?;
    validate_name(&name)?;
    let up_sql_path = directory.path().join("up.sql");
    if !up_sql_path.is_file() {
        return Err(MigrationValidationError::new(format!(
            "Migration '{name}' is missing '{}'. Every migration must contain up.sql.",
            up_sql_path.display()
        )));
    }
    Ok(MigrationFile { name, up_sql_path })
}

fn validate_name(name: &str) -> Result<(), MigrationValidationError> {
    let (timestamp, migration_name) = name.split_once('-').ok_or_else(|| invalid(name))?;
    if timestamp.is_empty()
        || !timestamp
            .chars()
            .all(|character| character.is_ascii_digit())
        || migration_name.is_empty()
    {
        return Err(invalid(name));
    }
    Ok(())
}

fn invalid(name: &str) -> MigrationValidationError {
    MigrationValidationError::new(format!(
        "Invalid migration directory '{name}'. Expected: <timestamp>-<name>"
    ))
}