internal static string LinkifiedText(EntityCollection entities, string text)
{
if (entities == null || entities.Count == 0)
{
return(text);
}
string linkedText = text;
var entitiesSorted = entities.OrderBy(e => e.StartIndex).Reverse();
foreach (Entity entity in entitiesSorted)
{
if (entity is HashTagEntity)
{
HashTagEntity tagEntity = (HashTagEntity)entity;
linkedText = string.Format(
"{0}<a href=\"http://twitter.com/search?q=%23{1}\">{1}</a>{2}",
linkedText.Substring(0, entity.StartIndex),
tagEntity.Text,
linkedText.Substring(entity.EndIndex));
}
if (entity is UrlEntity)
{
UrlEntity urlEntity = (UrlEntity)entity;
linkedText = string.Format(
"{0}<a href=\"{1}\">{1}</a>{2}",
linkedText.Substring(0, entity.StartIndex),
urlEntity.Url,
linkedText.Substring(entity.EndIndex));
}
if (entity is MentionEntity)
{
MentionEntity mentionEntity = (MentionEntity)entity;
linkedText = string.Format(
"{0}<a href=\"http://twitter.com/{1}\">@{1}</a>{2}",
linkedText.Substring(0, entity.StartIndex),
mentionEntity.ScreenName,
linkedText.Substring(entity.EndIndex));
}
}
return(linkedText);
}
/// <summary>
/// Reads the JSON representation of the object.
/// </summary>
/// <param name="reader">The <see cref="T:Newtonsoft.Json.JsonReader"/> to read from.</param>
/// <param name="objectType">Type of the object.</param>
/// <param name="existingValue">The existing value of object being read.</param>
/// <param name="serializer">The calling serializer.</param>
/// <returns>The object value.</returns>
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
EntityCollection result = existingValue as EntityCollection;
if (result == null)
{
result = new EntityCollection();
}
int startDepth = reader.Depth;
string entityType = string.Empty;
Entity entity = null;
try
{
while (reader.Read() && reader.Depth > startDepth)
{
if (reader.TokenType == JsonToken.PropertyName && reader.Depth == startDepth + 1)
{
entityType = (string)reader.Value;
continue;
}
if (reader.TokenType == JsonToken.StartArray || reader.TokenType == JsonToken.EndArray)
{
continue;
}
switch (entityType)
{
case "urls":
if (reader.TokenType == JsonToken.StartObject)
{
entity = new UrlEntity();
}
UrlEntity tue = entity as UrlEntity;
if (tue != null)
{
ReadFieldValue(reader, "url", entity, () => tue.Url);
ReadFieldValue(reader, "display_url", entity, () => tue.DisplayUrl);
ReadFieldValue(reader, "expanded_url", entity, () => tue.ExpandedUrl);
}
break;
case "user_mentions":
if (reader.TokenType == JsonToken.StartObject)
{
entity = new MentionEntity();
}
MentionEntity tme = entity as MentionEntity;
if (tme != null)
{
ReadFieldValue(reader, "screen_name", entity, () => tme.ScreenName);
ReadFieldValue(reader, "name", entity, () => tme.Name);
ReadFieldValue(reader, "id", entity, () => tme.UserId);
}
break;
case "hashtags":
if (reader.TokenType == JsonToken.StartObject)
{
entity = new HashTagEntity();
}
HashTagEntity the = entity as HashTagEntity;
if (the != null)
{
ReadFieldValue(reader, "text", entity, () => the.Text);
}
break;
case "media":
// Move to object start and parse the entity
reader.Read();
entity = parseMediaEntity(reader);
break;
}
// Read the indicies (for all entities except Media)
if (reader.TokenType == JsonToken.PropertyName && (string)reader.Value == "indices" && entity != null)
{
reader.Read();
reader.Read();
entity.StartIndex = Convert.ToInt32((long)reader.Value);
reader.Read();
entity.EndIndex = Convert.ToInt32((long)reader.Value);
}
if ((reader.TokenType == JsonToken.EndObject && entity != null) || entity is MediaEntity)
{
result.Add(entity);
entity = null;
}
}
}
catch { }
return(result);
}
