How to create stock charts using the Silverlight Toolkit

// (c) Copyright Microsoft Corporation.
// This source is subject to the Microsoft Public License (Ms-PL).
// Please see http://go.microsoft.com/fwlink/?LinkID=131993 for details.
// All other rights reserved.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Globalization;
using System.Diagnostics.CodeAnalysis;
using System.Net;
using System.Windows.Browser;
using System.Windows.Controls;

namespace Microsoft.Windows.Controls.Samples
{
    /// <summary>
    /// A set of simple helpers to enable the creation of more robust web 
    /// service samples. Includes a centralized place to get generic addresses 
    /// for service requests and web pages.
    /// </summary>
    public static class WebServiceHelper
    {
        /// <summary>
        /// The format of the URI for JSON requests to Live Suggestions.
        /// </summary>
        private const string LiveSuggestionsJsonUriFormat = "http://api.search.live.net/qson.aspx?query={0}";

        /// <summary>
        /// Standard Live Search URI.
        /// </summary>
        private const string LiveSearchUriFormat = "http://search.live.com/results.aspx?q={0}";
        
        /// <summary>
        /// A format string for creating a link to look at airline fares online.
        /// </summary>
        private const string AirfareSearchUriFormat = "http://farecast.live.com/flightsearch.do?t=r&o={0}&e={1}&d1={2}&r1={3}&p={4}&b=COACH"; 

        /// <summary>
        /// Gets a value indicating whether the document scheme allows for web 
        /// service access.
        /// </summary>
        /// <returns>Returns true when the scheme should permit web requests.</returns>
        public static bool CanMakeHttpRequests
        {
            get
            {
                if (!HtmlPage.IsEnabled)
                {
                    return false;
                }

                string scheme = HtmlPage.Document.DocumentUri.Scheme ?? string.Empty;
                return string.Compare(scheme, "http", StringComparison.OrdinalIgnoreCase) == 0;
            }
        }

        /// <summary>
        /// Creates a Uri to navigate to a web search service.
        /// </summary>
        /// <param name="searchText">The search string.</param>
        /// <returns>Returns a new Uri instance.</returns>
        public static Uri CreateWebSearchUri(string searchText)
        {
            return new Uri(string.Format(CultureInfo.InvariantCulture, LiveSearchUriFormat, HttpUtility.UrlEncode(searchText)));
        }

        /// <summary>
        /// Creates a Uri for retrieving search suggestion phrases.
        /// </summary>
        /// <param name="searchText">The search string.</param>
        /// <returns>Returns a new Uri instance.</returns>
        public static Uri CreateWebSearchSuggestionsUri(string searchText)
        {
            return new Uri(string.Format(CultureInfo.InvariantCulture, LiveSuggestionsJsonUriFormat, HttpUtility.UrlEncode(searchText)));
        }

        /// <summary>
        /// Creates a Uri to look up flight pricing trends online using the 
        /// Live Farecast service from Microsoft.
        /// </summary>
        /// <param name="departureAirport">The departure airport object.</param>
        /// <param name="arrivalAirport">The arrival airport object.</param>
        /// <param name="departure">The departure date.</param>
        /// <param name="arrival">The arrival date.</param>
        /// <param name="persons">The number of people that will be traveling.</param>
        /// <returns>Returns a new Uri object.</returns>
        public static Uri CreateAirfareSearchUri(Airport departureAirport, Airport arrivalAirport, DateTime departure, DateTime arrival, int persons)
        {
            return new Uri(string.Format(CultureInfo.InvariantCulture, AirfareSearchUriFormat, departureAirport.CodeFaa, arrivalAirport.CodeFaa, HttpUtility.UrlEncode(departure.ToShortDateString()), HttpUtility.UrlEncode(arrival.ToShortDateString()), persons.ToString(CultureInfo.InvariantCulture)));
        }
    }
}