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Viewing changes to SimplePlugins/src/StockQuoteAction.cs

  • Committer: David Siegel
  • Date: 2008-01-24 04:48:52 UTC
  • Revision ID: dave@ja7gggggggg9-20080124044852-9vnlo01h9kkyz12a
Added Epiphany plugin.

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SimplePlugins/src/StockQuoteAction.cs
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/* StockQuoteAction.cs
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 *
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 * GNOME Do is the legal property of its developers. Please refer to the
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 * COPYRIGHT file distributed with this source distribution.
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 *
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 * This program is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation, either version 3 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 */
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using System;
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using System.IO;
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using System.Net;
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using System.Text.RegularExpressions;
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using Do.Universe;
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using Do.Addins;
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namespace Do.Plugins.Universe
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{
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        /// <summary>
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        /// Given an ITextItem, StockQuoteAction will query Google Finance
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        /// for the quote, then scrape out the price, daily movement and percent move
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        /// </summary>
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        public class StockQuoteAction : AbstractAction
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        {
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                // String indicating the tags surronding the pertinent info
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                const string BeginPrice = "_l\">";
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                const string BeginMove = "_c\">";
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                const string BeginPercent =  "_cp\">";
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                const string EndResult = "</span>";
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                public StockQuoteAction ()
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                {
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                }
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                public override string Name {
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                        get { return "Stock Quote"; }
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                }
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                public override string Description
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                {
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                        get { return "Get Quotes From Google Finance."; }
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                }
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                public override string Icon
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                {
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                        get { return "stock_chart-autoformat"; }
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                }
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                public override Type[] SupportedItemTypes
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                {
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                        get {
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                                return new Type[] {
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                                        typeof (ITextItem),
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                                };
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                        }
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                }
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                public override bool SupportsItem (IItem item)
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                {
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                        string word;
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                        word = null;
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                        if (item is ITextItem) {
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                                word = (item as ITextItem).Text;
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                        }
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                        return !string.IsNullOrEmpty (word);
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                }
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                public override IItem[] Perform (IItem[] items, IItem[] modifierItems)
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                {
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                        string expression, url, reply, priceString, moveString, percentString, page;
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                        string pagePrice, pageMove, pagePer;
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                        int beginPrice, beginMove, beginPercent, endIndex;
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                        expression = (items[0] as ITextItem).Text;
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                        url = GoogleFinanceURL (expression);
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                        try {
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                                page = GetWebpageContents (url);
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                                beginPrice = page.IndexOf (BeginPrice);
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                                beginMove = page.IndexOf (BeginMove);
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                                beginPercent = page.IndexOf (BeginPercent);
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                                // Grab price
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                                if (beginPrice < 0 | beginMove < 0 | beginPercent < 0)
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                                        throw new Exception ();
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                                pagePrice = page.Substring (beginPrice);
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                                endIndex = pagePrice.IndexOf (EndResult);
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                                if (endIndex < 0)
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                                        throw new Exception ();
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                                priceString = pagePrice.Substring (BeginPrice.Length, endIndex-BeginPrice.Length);
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                                // Grab daily move
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                                pageMove = page.Substring (beginMove);
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                                endIndex = pageMove.IndexOf (EndResult);
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                                if (endIndex < 0)
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                                        throw new Exception ();
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                                moveString = pageMove.Substring (BeginMove.Length, endIndex-BeginMove.Length);
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                                // Grab percent move
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                                pagePer = page.Substring (beginPercent);
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                                endIndex = pagePer.IndexOf (EndResult);
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                                if (endIndex < 0)
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                                        throw new Exception ();
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                                percentString = pagePer.Substring (BeginPercent.Length, endIndex-BeginPercent.Length);
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                                reply = priceString + " " + moveString + " " + percentString;
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                        } catch {
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                                reply = "Google Finance could not process your request";
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                        }
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                        return new IItem[] { new TextItem (reply) };
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                }
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                string GoogleFinanceURL (string e)
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                {
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                        return "http://finance.google.com/finance?q=" + (e ?? "");
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                }
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                string GetWebpageContents (string url)
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                {
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                        HttpWebRequest request;
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                        WebResponse response;
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                        Stream stream;
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                        StreamReader reader;
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                        string content;
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                        request = HttpWebRequest.Create (url) as HttpWebRequest;
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                        response = request.GetResponse ();
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                        stream = response.GetResponseStream ();
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                        reader = new StreamReader (stream);
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                        content = reader.ReadToEnd ();
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                        reader.Close ();
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                        stream.Close ();
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                        response.Close ();
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                        return content;
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                }
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        }
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}