public JToken Vote(string id, string person = "")
{
// check if user has voted
if (InstagramFeedSettings.Instance.SingleVotePerUser)
{
if (_votes.GetVote(person, id) != null)
{
return(JToken.FromObject(new { result = "1", message = "User has already voted." }));
}
}
// create a distinct vote record
ImageVote vote = new ImageVote
{
instagramImageId = id,
voterId = person
};
_votes.Create(vote);
// update the vote summary on the image itself
InstagramImage image = Get(id);
if (image != null)
{
image.votes = _votes.GetVoteCount(image.instagramImageId);
_datalayer.Update(image);
}
// clear image from cache
this.FlushImage(id);
return(JToken.FromObject(new { result = "0" }));
}
public JToken BlockImage(string id)
{
if (!AuthenticationHelper.IsAdmin())
{
return(JToken.FromObject(new { result = "1", message = "permission error" }));
}
InstagramImage image = Get(id);
if (image != null && !image.isBlocked)
{
image.isBlocked = true;
_datalayer.Update(image);
this.FlushImage(id);
}
return(JToken.FromObject(new { result = "0" }));
}
public JToken GetImages(int page = 0, string sort = "", string search = "")
{
// update from instagram
const string checkKey = "_lastCheck";
DateTime? lastCheck = Cache.Get <DateTime?>(checkKey);
if (InstagramFeedSettings.Instance.PollInterally &&
(lastCheck == null || (DateTime.Now - lastCheck.Value).TotalSeconds > InstagramFeedSettings.Instance.InstagramPollInterval))
{
this.GetLatestFromInstagram();
Cache.Add(checkKey, DateTime.Now);
}
if (!string.IsNullOrEmpty(search))
{
search = search.Trim();
}
// get all other images from parse backedn
List <InstagramImage> results = new List <InstagramImage>();
bool isAdmin = AuthenticationHelper.IsAdmin(); // if admin can be true
IEnumerable <InstagramImage> images;
if (string.IsNullOrEmpty(search))
{
images = _datalayer.GetPage(isAdmin, null, sort, InstagramFeedSettings.Instance.PageSize, page);
}
else
{
images = _datalayer.GetPage(isAdmin, search, sort, InstagramFeedSettings.Instance.PageSize, 0);
}
foreach (InstagramImage oldImage in images)
{
// get cached version, with metadata. this really needs to be reworked
InstagramImage cachedImage = Get(oldImage.instagramImageId);
results.Add(cachedImage);
}
return(JToken.FromObject(new { tagCount = GetTagCount(), images = results, isAdmin }));
}
/// <summary>
/// gets an image from cache or parse
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
private InstagramImage Get(string id)
{
// look in cache
string key = string.Format("image_{0}", id);
InstagramImage image = Cache.Get <InstagramImage>(key);
if (image != null)
{
return(image);
}
//QueryResult<InstagramImage> result = client.GetObjects<InstagramImage>(new { instagramImageId = id });
//if (result == null || result.Results == null || !result.Results.Any())
// return null;
InstagramImage i = _datalayer.GetByInstagramId(id);
Cache.Add(key, i);
return(i);
}
/// <summary>
/// Calls instagrams' API ; gets the latest images which implement the given hash tag.
/// </summary>
private int GetLatestFromInstagram()
{
string instagramId = InstagramFeedSettings.Instance.InstagramClientId;
string hashTag = InstagramFeedSettings.Instance.HashTags.First();
string url = string.Format("https://api.instagram.com/v1/tags/{0}/media/recent?client_id={1}", hashTag, instagramId);
WebClient webClient = new WebClient();
string rawJson = webClient.DownloadString(url);
dynamic json = JsonConvert.DeserializeObject(rawJson);
int imagesAdded = 0;
JArray images = json["data"];
foreach (var image in images)
{
if (image == null)
{
continue;
}
// check if image exists from cache/parase
InstagramImage persistedImaged = this.Get(image["id"].ToString());
if (persistedImaged != null)
{
continue;
}
string caption = Exists(image["caption"]) && Exists(image["caption"]["text"]) ? image["caption"]["text"].ToString() : string.Empty;
string createdRaw = Exists(image["created_time"]) ? image["created_time"].ToString() : string.Empty;
string imageLink = Exists(image["images"]) && Exists(image["images"]["standard_resolution"]) && Exists(image["images"]["standard_resolution"]["url"]) ? image["images"]["standard_resolution"]["url"].ToString() : string.Empty;
string instagramImageId = Exists(image["id"]) ? image["id"].ToString() : string.Empty;
string link = Exists(image["link"]) ? image["link"].ToString() : string.Empty;
string thumbLink = Exists(image["images"]) && Exists(image["images"]["thumbnail"]) && Exists(image["images"]["thumbnail"]["url"]) ? image["images"]["thumbnail"]["url"].ToString() : string.Empty;
string userFullName = Exists(image["user"]) && Exists(image["user"]["full_name"]) ? image["user"]["full_name"].ToString() : string.Empty;
string userId = Exists(image["user"]) && Exists(image["user"]["id"]) ? image["user"]["id"].ToString() : string.Empty;
string username = Exists(image["user"]) && Exists(image["user"]["username"]) ? image["user"]["username"].ToString() : string.Empty;
string userThumbnail = Exists(image["user"]) && Exists(image["user"]["profile_picture"]) ? image["user"]["profile_picture"].ToString() : string.Empty;
string latitude = Exists(image["location"]) && Exists(image["location"]["latitude"]) ? image["location"]["latitude"].ToString() : string.Empty;
string longitude = Exists(image["location"]) && Exists(image["location"]["longitude"]) ? image["location"]["longitude"].ToString() : string.Empty;
string createdTime = Exists(image["created_time"]) ? image["created_time"].ToString() : string.Empty;
// enforce start date if set. Instagram uses Unix dates
if (InstagramFeedSettings.Instance.StartDate.HasValue)
{
int seconds;
int.TryParse(createdTime, out seconds);
System.DateTime epoch = new System.DateTime(1970, 1, 1, 0, 0, 0, 0);
if (seconds == 0)
{
continue; // can't parse unix date, something went wrong. todo : log this.
}
epoch = epoch.AddSeconds(seconds);
if (epoch < InstagramFeedSettings.Instance.StartDate.Value)
{
continue;
}
}
int created;
Int32.TryParse(createdRaw, out created);
persistedImaged = new InstagramImage
{
caption = caption,
created = created,
imageLink = imageLink,
instagramImageId = instagramImageId,
link = link,
thumbLink = thumbLink,
userFullName = userFullName,
userThumbnail = userThumbnail,
userId = userId,
longitude = longitude,
latitude = latitude,
username = username
};
_datalayer.Create(persistedImaged);
imagesAdded++;
}
return(imagesAdded);
}