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IWebHelper.cs

using Microsoft.AspNetCore.Http;

namespace Nop.Core;

/// <summary>
/// Represents a web helper
/// </summary>
public partial interface IWebHelper
{
    /// <summary>
    /// Get URL referrer if exists
    /// </summary>
    /// <returns>URL referrer</returns>
    string GetUrlReferrer();

    /// <summary>
    /// Get IP address from HTTP context
    /// </summary>
    /// <returns>String of IP address</returns>
    string GetCurrentIpAddress();

    /// <summary>
    /// Gets this page URL
    /// </summary>
    /// <param name="includeQueryString">Value indicating whether to include query strings</param>
    /// <param name="useSsl">Value indicating whether to get SSL secured page URL. Pass null to determine automatically</param>
    /// <param name="lowercaseUrl">Value indicating whether to lowercase URL</param>
    /// <returns>Page URL</returns>
    string GetThisPageUrl(bool includeQueryString, bool? useSsl = null, bool lowercaseUrl = false);

    /// <summary>
    /// Gets a value indicating whether current connection is secured
    /// </summary>
    /// <returns>True if it's secured, otherwise false</returns>
    bool IsCurrentConnectionSecured();

    /// <summary>
    /// Gets store host location
    /// </summary>
    /// <param name="useSsl">Whether to get SSL secured URL</param>
    /// <returns>Store host location</returns>
    string GetStoreHost(bool useSsl);

    /// <summary>
    /// Gets store location
    /// </summary>
    /// <param name="useSsl">Whether to get SSL secured URL; pass null to determine automatically</param>
    /// <returns>Store location</returns>
    string GetStoreLocation(bool? useSsl = null);

    /// <summary>
    /// Returns true if the requested resource is one of the typical resources that needn't be processed by the CMS engine.
    /// </summary>
    /// <returns>True if the request targets a static resource file.</returns>
    bool IsStaticResource();

    /// <summary>
    /// Modify query string of the URL
    /// </summary>
    /// <param name="url">Url to modify</param>
    /// <param name="key">Query parameter key to add</param>
    /// <param name="values">Query parameter values to add</param>
    /// <returns>New URL with passed query parameter</returns>
    string ModifyQueryString(string url, string key, params string[] values);

    /// <summary>
    /// Remove query parameter from the URL
    /// </summary>
    /// <param name="url">Url to modify</param>
    /// <param name="key">Query parameter key to remove</param>
    /// <param name="value">Query parameter value to remove; pass null to remove all query parameters with the specified key</param>
    /// <returns>New URL without passed query parameter</returns>
    string RemoveQueryString(string url, string key, string value = null);

    /// <summary>
    /// Gets query string value by name
    /// </summary>
    /// <typeparam name="T">Returned value type</typeparam>
    /// <param name="name">Query parameter name</param>
    /// <returns>Query string value</returns>
    T QueryString<T>(string name);

    /// <summary>
    /// Restart application domain
    /// </summary>
    void RestartAppDomain();

    /// <summary>
    /// Gets a value that indicates whether the client is being redirected to a new location
    /// </summary>
    bool IsRequestBeingRedirected { get; }

    /// <summary>
    /// Gets or sets a value that indicates whether the client is being redirected to a new location using POST
    /// </summary>
    bool IsPostBeingDone { get; set; }

    /// <summary>
    /// Gets current HTTP request protocol
    /// </summary>
    string GetCurrentRequestProtocol();

    /// <summary>
    /// Gets whether the specified HTTP request URI references the local host.
    /// </summary>
    /// <param name="req">HTTP request</param>
    /// <returns>True, if HTTP request URI references to the local host</returns>
    bool IsLocalRequest(HttpRequest req);

    /// <summary>
    /// Get the raw path and full query of request
    /// </summary>
    /// <param name="request">HTTP request</param>
    /// <returns>Raw URL</returns>
    string GetRawUrl(HttpRequest request);

    /// <summary>
    /// Gets whether the request is made with AJAX 
    /// </summary>
    /// <param name="request">HTTP request</param>
    /// <returns>Result</returns>
    bool IsAjaxRequest(HttpRequest request);
}