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umdtalks.ur
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table lists : {
Id : int,
Title : string,
Details : string,
Image_id : int,
Created_at : time,
Updated_at : time
}
(*Kind : string,*)
(*Details_filter : string,*)
(*Ex_directory : bool,*)
PRIMARY KEY Id
sequence listSeq
table lists_lists : {
Parent_id : int,
Child_id : int
}
table talks : {
Id : int,
Title : string,
Abstract : string,
Start_time : time,
End_time : time,
Speaker_name : string,
Venue : string,
Created_at : time,
Updated_at : time,
Image_id : int
}
(*Speaker_id : int,
Series_id : int,
Venue_id : int,*)
(*Special_message : string,
Abstract_filtered : string,*)
(*Organiser_id : int,*)
PRIMARY KEY Id
sequence talkSeq
table lists_talks : {
Parent_id : int,
Talk_id : int
}
table users : {
Id : int,
Email : string,
Alias : string,
Password : string,
Affiliation : string,
(*Administrator : int,*)
Last_login : time,
Image_id : int,
Created_at : time,
Updated_at : time,
Session_crumb: string
}
PRIMARY KEY Id
sequence userSeq
table list_owners : {
Owner_id : int,
List_id : int
}
table talk_owners : {
Owner_id : int,
Talk_id : int
}
(* Organizations?? or just organizers. *)
style wrapper
style header
style content
style footer
style right
style left
style login
style box
style details
style title
style hdiv
style abstract
style button
datatype inputError =
| INone
| IError of string (* cross with the row (prev values)?? *)
cookie userSession : {Username : string, Session_crumb : string}
(*type user = int * string*)
(* Gets the logged in user. *)
fun getUser () =
cook <- getCookie userSession;
( case cook of
| None => return None
| Some c =>
(* get userid, call getUserWithId? *)
user <- oneOrNoRows1 (SELECT users.Id, users.Email, users.Alias, users.Affiliation, users.Last_login, users.Created_at, users.Updated_at FROM users WHERE users.Email = {[c.Username]} AND users.Session_crumb = {[c.Session_crumb]});
( case user of
| None =>
return None
| Some u =>
return (Some u)
)
)
(* Gets the user record with the given id. *)
fun getUserWithId id =
user <- oneOrNoRows1 (SELECT users.Id, users.Email, users.Alias, users.Affiliation, users.Last_login, users.Created_at, users.Updated_at FROM users WHERE users.Id = {[id]});
( case user of
| None => return None
| Some u =>
return (Some u)
)
fun unimplemented () = return <xml>
<body>
Unimplemented
</body>
</xml>
fun search r = return <xml>
<body>
Unimplemented
</body>
</xml>
fun template title sidebar body = (
title' <- return (case title of
| None => "UMDTalks"
| Some t => t ^ " - UMDTalks"
);
user <- getUser ();
top <- ( case user of
| None => return <xml>
<div class={box}>
<div class={header}>
<a link={signin False}>Log in</a>
</div>
</div>
</xml>
| Some u => return <xml>
<div class={box}>
<div class={header}>
<a link={profile None}>Profile</a> | <a link={signout ()}>Log out</a>
</div>
</div>
</xml>
);
return <xml>
<head>
<title>{[title']}</title>
<link rel="stylesheet" type="text/css" href="/css/index.css" />
<link rel="icon" href="/images/favicon.ico" />
</head>
<body>
<div class={wrapper}>
<div class={header}>
<a link={index ()}><img src="/images/reallybigtalkslogo.gif" /></a>
<div class={login}>
{top}
</div>
</div>
<div class={content}>
<div class={left}>
{sidebar}
</div>
<div class={right}>
{body}
</div>
</div>
</div>
<div class={footer}>
<a link={index ()}>Home</a> | (*About | *)University of Maryland © 2011
</div>
</body>
</xml>
)
and index () = (
search <- searchBox ();
hasLists <- hasRows (SELECT * FROM lists); (*WHERE lists.Id = 1 ???*)
featLists <- ( case hasLists of
| True => queryX (SELECT * FROM lists) (fn r =>
<xml>
<div>
<a link={list r.Lists.Id}>{[r.Lists.Title]}</a>
</div>
</xml>
)
| False => return <xml>
There are no featured lists at this time.
</xml>
);
sidebar <- return <xml>
{search}
<div class={box}>
<div class={header}>
Featured Lists
</div>
<div class={content}>
{featLists}
</div>
</div>
</xml>;
hasTalks <- hasRows (SELECT * FROM talks);
featTalks <- ( case hasTalks of
| True =>
queryX ( SELECT * FROM talks) (fn r =>
<xml>
<div>
<a link={talk r.Talks.Id}>{[r.Talks.Title]}</a>
</div>
</xml>
)
| False => return
<xml>
There are no featured talks at this time.
</xml>
);
body <- return <xml>
<div class={box}>
<div class={header}>
Featured Talks
</div>
<div class={content}>
{featTalks}
</div>
</div>
</xml>;
template None sidebar body
)
and list id =
search <- searchBox ();
row <- oneOrNoRows (SELECT * FROM lists WHERE lists.Id = {[id]});
( case row of
| None =>
body <- return <xml>
<div class={box}>
<div class={header}>
Sorry!
</div>
<div class={content}>
We could not find the list you were looking for.
</div>
</div>
</xml>;
template (Some "List not found") search body
| Some r =>
sidebar <- return <xml>
{search}
<div class={box}>
<div class={header}>
Dashboard
</div>
<div class={content}>
Add to list (*<select>
<option>You have no lists</option>
</select>*) <br />
Subscribe to calendar
</div>
</div>
<div class={box}>
<div class={header}>
Sublists and Talks
</div>
<div class={content}>
Sublists...
</div>
</div>
</xml>;
body <- return <xml>
<div class={box}>
<div class={header}>
{[r.Lists.Title]}
</div>
<div class={content}>
Talks in this list
</div>
</div>
</xml>;
template (Some r.Lists.Title) sidebar body
)
and talk id =
search <- searchBox ();
row <- oneOrNoRows (SELECT * FROM talks WHERE talks.Id = {[id]});
( case row of
| None =>
body <- return <xml>
<div class={box}>
<div class={header}>
Sorry!
</div>
<div class={content}>
We could not find the talk you were looking for.
</div>
</div>
</xml>;
template (Some "Talk not found") search body
| Some r =>
sidebar <- return <xml>
{search}
<div class={box}>
<div class={header}>
Dashboard
</div>
<div class={content}>
Add to list (*<select>
<option>You have no lists</option>
</select>*) <br />
Download to calendar
</div>
</div>
</xml>;
body <- return <xml>
<div class={box}>
<div class={header}>
{[r.Talks.Title]}
</div>
<div class={content}>
<div class={title}>Details</div>
<hr class={hdiv} />
<ul class={details}>
<li><img src="/images/user.jpg" /> {[r.Talks.Speaker_name]}</li>
<li><img src="/images/clock.jpg" /> {[r.Talks.Start_time]}</li>
<li><img src="/images/house.jpg" /> {[r.Talks.Venue]} </li>
(*<li>Organizers/Owners: todo!!!</li>*)
</ul>
<br />
<div class={title}>Abstract</div>
<hr class={hdiv} />
<div class={abstract}>
{[r.Talks.Abstract]}
</div>
</div>
</div>
</xml>;
template (Some r.Talks.Title) sidebar body
)
and profile (id : option int) =
user <- ( case id of
| None =>
( getUser ())
| Some id' =>
( getUserWithId id')
);
search <- searchBox ();
sidebar <- ( case user of
| None =>
return <xml>{search}</xml>
| Some u =>
(* Can you do this with one query? *)
hasLists <- hasRows (SELECT * FROM list_owners, lists WHERE list_owners.Owner_id = {[u.Id]} AND list_owners.List_id = lists.Id);
userLists <- ( case hasLists of
| True => queryX (SELECT * FROM list_owners, lists WHERE list_owners.Owner_id = {[u.Id]} AND list_owners.List_id = lists.Id)
(fn r =>
<xml>
<div>
<a link={list r.Lists.Id}>{[r.Lists.Title]}</a>
</div>
</xml>
)
| False => return <xml>
This user has no lists.
</xml>
);
return <xml>
{search}
<div class={box}>
<div class={header}>
{[u.Alias]}'s Lists
<a class={button} link={createList ()}>New</a>
</div>
<div class={content}>
{userLists}
</div>
</div>
</xml>
);
body <- ( case user of
| None =>
return <xml>
<div class={box}>
<div class={header}>
Sorry!
</div>
<div class={content}>
We could not find the user you were looking for.
</div>
</div>
</xml>
| Some u =>
hasTalks <- hasRows (SELECT * FROM talk_owners, talks WHERE talk_owners.Owner_id = {[u.Id]} AND talk_owners.Talk_id = talks.Id);
userTalks <- ( case hasTalks of
| True => queryX (SELECT * FROM talk_owners, talks WHERE talk_owners.Owner_id = {[u.Id]} AND talk_owners.Talk_id = talks.Id)
(fn r =>
<xml>
<div>
<a link={talk r.Talks.Id}>{[r.Talks.Title]}</a>
</div>
</xml>
)
| False => return <xml>
This user has no talks.
</xml>
);
return <xml>
<div class={box}>
<div class={header}>
{[u.Alias]}'s Profile
(*<a class={button} link={editAccount INone}>Edit</a>*)
</div>
<div class={content}>
Name: {[u.Alias]}<br />
Email: {[u.Email]}<br />
Affiliation: {[u.Affiliation]}<br />
</div>
</div>
<div class={box}>
<div class={header}>
{[u.Alias]}'s Talks
<a class={button} link={createTalk INone}>New</a>
</div>
<div class={content}>
{userTalks}
</div>
</div>
</xml>
);
template (Some "Profile") sidebar body
(* TODO: change failed to a record, remembers attempted username(inputError) *)
and signin failed =
(* TODO: if already signed in redirect ( url (index ())) *)
search <- searchBox ();
msg <- return ( case failed of
| False => <xml></xml>
| True => <xml>Invalid username or password.</xml>
);
body <- return <xml>
<div class={box}>
<div class={header}>
Login
</div>
<div class={content}>
{msg}
<form>
<p>Username:<br/><textbox{#Username}/><br/>
Password:<br/><password{#Password}/><br/>
<submit value="Login" action={authenticate}/>
</p>
</form>
Register <a link={register ()(*INone*)}>here</a>.
</div>
</div>
</xml>;
template (Some "Login") search body
and signout () =
cook <- getCookie userSession;
clearCookie userSession;
case cook of
| None =>
redirect ( url (index ()))
| Some c =>
dml (UPDATE users SET Session_crumb = "" WHERE Email={[c.Username]});
redirect ( url (index ()))
and register error =
search <- searchBox ();
body <- return <xml>
<div class={box}>
<div class={header}>
Register
</div>
<div class={content}>
<form>
<p>Email:<textbox{#Email}/><br/>
Password:<password{#Password}/><br/>
Name:<textbox{#Alias}/><br/>
Affiliation:<textbox{#Affiliation}/><br/>
<submit value="Register" action={createAccount}/>
</p>
</form>
</div>
</div>
</xml>;
template (Some "Register") search body
and createAccount row =
r <- oneOrNoRows1 (SELECT users.Id FROM users
WHERE users.Email={[row.Email]});
case r of
| Some _ => register ()(*IError "Sorry, this email is already in use."*)
| None =>
(* TODO: Some input checking*)
search <- searchBox ();
id <- nextval userSeq;
dml (INSERT INTO users (Id,Email,Alias,Password,Affiliation,Last_login,Image_id,Created_at,Updated_at,Session_crumb) VALUES ({[id]},{[row.Email]},{[row.Alias]},{[Hash.sha512 (row.Email ^ row.Password)]},{[row.Affiliation]},CURRENT_TIMESTAMP,0,CURRENT_TIMESTAMP,CURRENT_TIMESTAMP,""));
body <- return <xml>
<div class={box}>
<div class={header}>
Account created!
</div>
<div class={content}>
Account successfully created. Login <a link={signin False}>here</a>.
</div>
</div>
</xml>;
template (Some "Account Created") search body
and authenticate row =
r <- oneOrNoRows1 (SELECT users.Id FROM users
WHERE users.Email={[row.Username]}
AND users.Password = {[Hash.sha512 (row.Username ^ row.Password)]});
case r of
| None => signin True
| Some r' =>
rnd <- Random.str 63;(*use rand?*)
let
val session = {Username = row.Username, Session_crumb = rnd}
in
dml (UPDATE users SET Session_crumb = {[rnd]} WHERE Email={[row.Username]});
setCookie userSession {Value = session,
Expires = None,
Secure = False};
redirect ( url (profile None))
end
and searchBox () : transaction xbody =
return <xml>
<div class={box}>
<div class={header}>
Find a Talk
</div>
<div class={content}>
<form>
<textbox{#Query}/>
<submit action={search} value="Search" />
</form>
<a link={unimplemented ()}>Advanced Search</a>
<p>
<a link={unimplemented ()}>Upcoming Talks</a><br />
<a link={unimplemented ()}>Recently Added</a>
</p>
</div>
</div>
</xml>
and createList () =
unimplemented ()
(* user <- getUser ();
( case user of
| None => redirect (url (signin False))
| Some u =>redirect (url (signin False))
) *)
(* Page to create talks. *)
and createTalk (err : inputError) =
user <- getUser ();
( case user of
| None => redirect (url (signin False))
| Some u =>
search <- searchBox ();
msg <- return ( case err of
| INone => ""
| IError s => s
);
body <- return <xml>
<div class={box}>
<div class={header}>
Create a new talk
</div>
<div class={content}>
{[msg]}
<form>
<p>Title:<textbox{#Title}/><br/>
Abstract:<textbox{#Abstract}/><br/>
Speaker:<textbox{#Speaker}/><br/>
Venue:<textbox{#Venue}/><br/>
<submit value="Create" action={insertTalk}/>
</p>
</form>
</div>
</div>
</xml>;
template (Some "Create talk") search body
)
(* Handle user input and insert talk into db. *)
and insertTalk row =
user <- getUser ();
( case user of
| None =>
redirect (url (signin False))
| Some u =>
id <- nextval talkSeq;
dml (INSERT INTO talks (Id, Title, Abstract, Start_time, End_time, Speaker_name, Venue, Created_at, Updated_at, Image_id) VALUES ({[id]},{[row.Title]},{[row.Abstract]},CURRENT_TIMESTAMP,CURRENT_TIMESTAMP,{[row.Speaker]},{[row.Venue]},CURRENT_TIMESTAMP,CURRENT_TIMESTAMP,0));
dml (INSERT INTO talk_owners (Owner_id, Talk_id) VALUES ({[u.Id]},{[id]}));
redirect (url (talk id))
)