79 lines
2.1 KiB
Swift
79 lines
2.1 KiB
Swift
//
|
|
// Pagination.swift
|
|
// Buildkite
|
|
//
|
|
// Created by Aaron Sky on 5/5/20.
|
|
// Copyright © 2020 Aaron Sky. All rights reserved.
|
|
//
|
|
|
|
import Foundation
|
|
|
|
#if canImport(FoundationNetworking)
|
|
import FoundationNetworking
|
|
#endif
|
|
|
|
public struct Page {
|
|
public var nextPage: Int?
|
|
public var previousPage: Int?
|
|
public var firstPage: Int?
|
|
public var lastPage: Int?
|
|
|
|
init?(for header: String) {
|
|
guard !header.isEmpty else {
|
|
return nil
|
|
}
|
|
|
|
for link in header.split(separator: ",") {
|
|
let segments = link
|
|
.trimmingCharacters(in: .whitespacesAndNewlines)
|
|
.split(separator: ";")
|
|
guard
|
|
segments.count <= 2,
|
|
|
|
let urlString = segments.first,
|
|
urlString.hasPrefix("<") && urlString.hasSuffix(">"),
|
|
|
|
let url = URLComponents(string: String(urlString.dropFirst().dropLast())),
|
|
|
|
let pageString = url.queryItems?.first(where: { $0.name == "page" })?.value,
|
|
let page = Int(pageString) else {
|
|
continue
|
|
}
|
|
|
|
for segment in segments.dropFirst() {
|
|
switch segment.trimmingCharacters(in: .whitespacesAndNewlines) {
|
|
case "rel=\"next\"":
|
|
nextPage = page
|
|
case "rel=\"prev\"":
|
|
previousPage = page
|
|
case "rel=\"first\"":
|
|
firstPage = page
|
|
case "rel=\"last\"":
|
|
lastPage = page
|
|
default:
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public struct PageOptions {
|
|
public var page: Int
|
|
public var perPage: Int
|
|
|
|
public init(page: Int, perPage: Int) {
|
|
self.page = page
|
|
self.perPage = perPage
|
|
}
|
|
}
|
|
|
|
extension Array where Element == URLQueryItem {
|
|
init(pageOptions: PageOptions) {
|
|
self.init()
|
|
append(URLQueryItem(name: "page", value: String(pageOptions.page)))
|
|
append(URLQueryItem(name: "per_page", value: String(pageOptions.perPage)))
|
|
}
|
|
}
|
|
|