cdumay_context

A flexible context management library that provides a trait-based approach for handling key-value data with support for multiple serialization formats.

Features

• Generic context management through the Contextualize trait and a Context struct
• Support for multiple serialization formats (with feature flags):
  • JSON (feature: "json")
  • TOML (feature: "toml")
  • YAML (feature: "yaml")
• Allow to dump context into reqwest headers using feature "http-headers"
• Type-safe error handling with the Error enum

Example Usage

use std::collections::BTreeMap;
use serde::{Serialize, Deserialize};
use cdumay_context::{Contextualize, Error, Context};

// Basic usage
let mut ctx = Context::new();
ctx.insert("name".to_string(), serde_value::Value::String("Alice".to_string()));

// JSON serialization (requires "json" feature)
#[cfg(feature = "json")]
{
    let json = ctx.to_json(true).unwrap();
    let ctx_from_json = Context::from_json(&json).unwrap();
    assert_eq!(ctx.get("name"), ctx_from_json.get("name"));
}

// TOML serialization (requires "toml" feature)
#[cfg(feature = "toml")]
{
    let toml = ctx.to_toml(true).unwrap();
    let ctx_from_toml = Context::from_toml(&toml).unwrap();
    assert_eq!(ctx.get("name"), ctx_from_toml.get("name"));
}

Error Handling

The library provides a comprehensive error handling system through the Error enum:

use std::collections::BTreeMap;
use serde::{Serialize, Deserialize};
use cdumay_context::{Context, Contextualize, Error};
use rand::Rng;

fn example_error_handling() -> Result<(), Error> {
    let mut rng = rand::rng();
    let dice_roll: u8 = rng.random_range(1..=6);

    // Generic error
    if dice_roll == 7 {
        return Err(Error::Generic("Something went wrong".to_string()));
    }

    // JSON error (with "json" feature)
    #[cfg(feature = "json")]
    {
        let invalid_json = "{ invalid: json }";
        let result = Context::from_json(invalid_json);
        assert!(matches!(result, Err(Error::Json(_))));
    }
    Ok(())
}