b453d5d
use serde::{Deserialize, Serialize};
use utoipa::{IntoParams, ToSchema};
pub const DEFAULT_PAGE_LIMIT: u64 = 50;
pub const MAX_PAGE_LIMIT: u64 = 100;
pub const MAX_OFFSET: u64 = 5000;
#[derive(Debug, Clone, Deserialize, IntoParams, ToSchema)]
pub struct PageQuery {
pub limit: Option<u64>,
pub offset: Option<u64>,
pub sort: Option<String>,
}
impl PageQuery {
pub fn limit(&self) -> u64 {
self.limit
.unwrap_or(DEFAULT_PAGE_LIMIT)
.clamp(1, MAX_PAGE_LIMIT)
}
pub fn offset(&self) -> u64 {
self.offset.unwrap_or(0).clamp(0, MAX_OFFSET)
}
pub fn page(&self) -> (u64, u64) {
(self.limit(), self.offset())
}
}
#[derive(Debug, Clone, Serialize, ToSchema)]
pub struct Page<T> {
pub items: Vec<T>,
pub total: i64,
pub limit: u64,
pub offset: u64,
}
pub fn paginate<T>(items: Vec<T>, page: &PageQuery) -> Page<T> {
let total = items.len() as i64;
let (limit, offset) = page.page();
let items = items
.into_iter()
.skip(offset as usize)
.take(limit as usize)
.collect();
Page {
items,
total,
limit,
offset,
}
}