Attractor/App/Web Search/SearchProvider.swift

//
//  SearchProvider.swift
//  App
//
//  Created by James Magahern on 3/9/21.
//

import Foundation

class SearchProvider
{
    static let google = SearchProvider(resolver: { query in
        // gbv=1: no JS
        URL(string: "https://google.com/search?q=\(query.sanitized())&gbv=1")!
    })
    
    static let duckduckgo = SearchProvider(resolver: { query in
        // html version is the one without JS
        URL(string: "https://html.duckduckgo.com/html/?q=\(query.sanitized())")!
    })
    
    static let searxnor = SearchProvider(resolver: { query in
        URL(string: "http://searx.nor/search?q=\(query.sanitized())&categories=general")!
    })
    
    static let whoogle = SearchProvider(resolver: { query in
        URL(string: "http://whoogle.nor/search?q=\(query.sanitized())")!
    })
    
    func searchURLWithQuery(_ query: String) -> URL {
        return resolver(query)
    }
    
    internal let resolver: (String) -> URL
    internal init(resolver: @escaping (String) -> URL) {
        self.resolver = resolver
    }
}

fileprivate extension String {
    func sanitized() -> String {
        self
            .replacingOccurrences(of: " ", with: "+")
            .addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
    }
}