// Copyright (c) 2025-2026 Zensical and contributors

// SPDX-License-Identifier: MIT
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// ----------------------------------------------------------------------------

//! Map operator.

use crate::graph::Graph;

// ----------------------------------------------------------------------------
// Implementations
// ----------------------------------------------------------------------------

impl<T> Graph<T> {
    /// Maps the nodes to a different type.
    ///
    /// # Examples
    ///
    /// ```
    /// # use std::error::Error;
    /// # fn main() -> Result<(), Box<dyn Error>> {
    /// use zrx_graph::Graph;
    ///
    /// // Create graph builder and add nodes
    /// let mut builder = Graph::builder();
    /// let a = builder.add_node("a");
    /// let b = builder.add_node("b");
    /// let c = builder.add_node("c");
    ///
    /// // Create edges between nodes
    /// builder.add_edge(a, b)?;
    /// builder.add_edge(b, c)?;
    ///
    /// // Create graph from builder and map data
    /// let graph = builder.build();
    /// graph.map(str::to_uppercase);
    /// # Ok(())
    /// # }
    /// ```
    #[inline]
    pub fn map<F, U>(self, f: F) -> Graph<U>
    where
        F: FnMut(T) -> U,
    {
        Graph {
            data: self.data.into_iter().map(f).collect(),
            topology: self.topology,
        }
    }
}
