#social-browsing

lulz The information we'll be maintaining:

1. Sites visited (userid, url, host, time, timespent)
2. Comments (userid, url, comment, time)
3. Messages (senderid, receiverid, html, seen, time)

Messages are the annotations. You read something and annotate and send it to a friend.

---

The client-server communication is RESTful.

The following three are the API end points:

• /visited
• /comments
• /messages

Notes:

There are 2 types of parameters in the following content. "URL Param" and "Data Param". URL Params are passed via the url, and Data Params are passed in the body of the HTTP request (like how it's done in POST). URL Params are of two types again - embed the parameter in the path of the url (like /messages/:messageid); or, embed the parameter in the query string (like /messages/?limit=10). Unless mentioned in the url of the API-call, any URL Param is a query-string paramater.

History of currently logged-in user

URL	Method
/visited	GET

Param	Type	DataType	Required	Default
page	Url Param	string	False	1

• Success Response:

  Code: 200
  Content: UserHistory object

• Error Response:

  Code: 401 UNAUTHORIZED
  Content: { error : "Log in" }

• Notes:
  Nothing much

---

Visit a page

URL	Method
/visited	POST

Param	Type	DataType	Required	Default
url	Data Param	string	True	N/A

• Success Response:

  Code: 200
  Content: PageData object

• Error Response:

  Code: 401 UNAUTHORIZED
  Content: { error : "Log in" }

  OR

  Code: 400 BAD REQUEST
  Content: { error : "Bad URL" }

• Notes:
  The second error occurs when the URL is malformed.

---

Delete a page-view from history

URL	Method
/visited:/visitid	DELETE

Param	Type	DataType	Required	Default
visitid	URL Param	string	True	N/A

• Success Response:

  Code: 200
  Content: Empty

• Error Response:

  Code: 401 UNAUTHORIZED
  Content: { error : "Log in" }

  OR

  Code: 404 NOT FOUND
  Content: { error : "No entry in history has the given visitid" }

• Notes:
  Nothing much

---

Comment on a page

URL	Method
/comments	POST

Param	Type	DataType	Required	Default
url	Data Param	string	True	N/A
comment	Data Param	string	True	N/A

• Success Response:

  Code: 200
  Content: { commentid: "<commentid>" }

• Error Response:

  Code: 401 UNAUTHORIZED
  Content: { error : "Log in" }

  OR

  Code: 400 BAD REQUEST
  Content: { error : "Bad URL" }

• Notes:
  The server must check if the page on which the client is commenting has been visited by the client (Checking this is not a priority, but still, important from good-code POV).

  The second error occurs in either of the two cases:
  

  • The url is malformed.
    
  • The url hasn't been visited by the client.
    

---

Delete a comment

URL	Method
/comments:/:commentid	DELETE

Param	Type	DataType	Required	Default
commentid	URL Param	string	True	N/A

• Success Response:

  Code: 200
  Content: Empty

• Error Response:

  Code: 401 UNAUTHORIZED
  Content: { error : "Log in" }

  OR

  Code: 404 NOT FOUND
  Content: { error : "comment with given commentid doesn't exist" }

• Notes:
  The 2nd error should be thrown in either of the two cases:
  

  • The user supplies a non-existing comment id.
    
  • The user supplies a comment id of a comment that he didn't make.
    

---

Send a message

URL	Method
/messages/:receiverid	POST

Param	Type	DataType	Required	Default
receiverid	URL Param	string	True	N/A
message	Data Param	string	True	""
html	Data Param	string	True	""
public	Data Param	bool	True	N/A

• Success Response:

  Code: 200
  Content: { messageid: "<messageid>" }

• Error Response:

  Code: 401 UNAUTHORIZED
  Content: { error : "Log in" }

  OR

  Code: 400 BAD REQUEST
  Content: { error : "Bad receiverid" }

  OR

  Code: 400 BAD REQUEST
  Content: { error : "message or html is required" }

  OR

  Code: 400 BAD REQUEST
  Content: { error : "public is required" }

• Notes:
  The two parameters message and html both have been marked as "required", however, only one of them is required. The other may be empty. This allows users to send normal text messages to each other.

  The public paramater, if true, makes the annotations public. So, if someone comes to this url later, and is a friend of the guy who makes the doodle, will get an option to see the annotations.

  We will need to make this secure later, because the html we're storing is directly dumped onto the receiver's browser, including the <script&rt; tags. This might have security issues, though I haven'thought through it yet.

---

View messages

URL	Method
/messages	GET

Param	Type	DataType	Required	Default
since	URL Param	timestamp	False	<current-time>
limit	URL Param	integer	False	10

• Success Response:

  Code: 200
  Content: an array of PartialMessage objects

• Error Response:

  Code: 401 UNAUTHORIZED
  Content: { error : "Log in" }

• Notes:
  Max value of limit = 20 (no particular reason. But we need to limit the limit. Sic.)

  The paramaters will be given in the query string.

---

Open a message

URL	Method
/messages/:messageid	POST

Param	Type	DataType	Required	Default
messageid	URL Param	string	True	N/A

• Success Response:

  Code: 200
  Content: CompleteMessage

• Error Response:

  Code: 401 UNAUTHORIZED
  Content: { error : "Log in" }

  OR

  Code: 404 NOT FOUND
  Content: { error : "message with given messageid doesn't exist" }

• Notes:
  This is a POST request, because it modifies the state - the message opened is marked as seen.

---

DataTypes

UserHistory:

{
    "userid": <string>,
    "page": <integer>,
    "history": [
        {
            "visitid": <string>
            "url": <string>,
            "host": <string>,
            "time": TimeStamp
        },
        .
        .
        .
    ]
}

PageData:

{
    "url": <string>,
    "visits": [
        {
            "visitid": <string>
            "userid": <string>,
            "time": TimeStamp
        }
        .
        .
        .
    ],
    "hostVisits": [
        {
            "visitid": <string>,
            "userid": <string>,
            "time": TimeStamp,
            "url": <string>
        }
        .
        .
        .
    ],
    "comments": [
        {
            "commentid": <string>,
            "userid": <string>,
            "time": TimeStamp,
            "comment": <string>
        }
    ]
}

PartialMessage:

{
    "messageid": <string>,
    "senderid": <string>,
    "receiverid": <string>
    "seen": bool,
    "text": <string>
    "time": TimeStamp
}

CompleteMessage:

{
    "messageid": <string>,
    "senderid": <string>,
    "receiverid": <string>
    "seen": bool,
    "text": <string>
    "html": <string>
    "time": TimeStamp,
}