Struct PushPolicy 

pub struct PushPolicy {
    pub max_push_count: u8,
    pub min_zoom: u8,
    pub max_zoom: u8,
    pub formats: Vec<TileFormat>,
    pub base_url: String,
}

Decides which neighbouring tiles to push alongside a tile request.

Fields

max_push_count: u8

Maximum number of push hints to generate per request.

min_zoom: u8

Minimum zoom level to consider for push hints.

max_zoom: u8

Maximum zoom level to consider for push hints.

formats: Vec<TileFormat>

Tile formats to include in push hints.

base_url: String

Base URL prepended to each tile path.

Implementations

impl PushPolicy

pub fn new(base_url: impl Into<String>) -> Self

Creates a PushPolicy with sensible defaults: max_push_count=8, zoom 0–22, MVT format.

pub fn generate_hints(&self, requested: &TileKey) -> Vec<PushHint>

Generates push hints for the neighbours of requested.

Uses a TilePrefetcher with radius 1, filters by zoom range and format, and caps the result at max_push_count.

pub fn to_link_header_value(hints: &[PushHint]) -> String

Joins multiple hints into a single Link header value (comma-separated).

pub fn parse_tile_url(url: &str, base_url: &str) -> Option<TileKey>

Parses a tile URL of the form {base_url}/{layer}/{z}/{x}/{y}.{ext} back into a TileKey. Returns None if the URL is malformed.