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closedBallot.ur
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open Bootstrap
functor Make(M : sig
con voterKey1 :: Name
type voterKeyT
con voterKeyR :: {Type}
constraint [voterKey1] ~ voterKeyR
con voterKey = [voterKey1 = voterKeyT] ++ voterKeyR
con voterRest :: {Type}
constraint voterKey ~ voterRest
con voterKeyName :: Name
con voterOtherConstraints :: {{Unit}}
constraint [voterKeyName] ~ voterOtherConstraints
val voter : sql_table (voterKey ++ voterRest) ([voterKeyName = map (fn _ => ()) voterKey] ++ voterOtherConstraints)
val voterKeyInj : $(map sql_injectable_prim voterKey)
val voterKeyFl : folder voterKey
val voterKeyShow : show $voterKey
val voterKeyEq : $(map eq voterKey)
val voterKeyOrd : $(map ord voterKey)
con choiceBallot :: {Type} (* Identifies subsets of the choices that should be considered together *)
con choiceKey1 :: Name
type choiceKeyT
con choiceKeyR :: {Type}
constraint [choiceKey1] ~ choiceKeyR
con choiceKey = [choiceKey1 = choiceKeyT] ++ choiceKeyR
con choiceRest :: {Type}
constraint choiceBallot ~ choiceKey
constraint (choiceKey ++ choiceBallot) ~ choiceRest
con choiceKeyName :: Name
con choiceOtherConstraints :: {{Unit}}
constraint [choiceKeyName] ~ choiceOtherConstraints
val choice : sql_table (choiceBallot ++ choiceKey ++ choiceRest) ([choiceKeyName = map (fn _ => ()) (choiceBallot ++ choiceKey)] ++ choiceOtherConstraints)
val choiceKeyInj : $(map sql_injectable_prim choiceKey)
val choiceKeyFl : folder choiceKey
val choiceKeyShow : show $choiceKey
val choiceKeyEq : $(map eq choiceKey)
val choiceBallotInj : $(map sql_injectable_prim choiceBallot)
val choiceBallotFl : folder choiceBallot
constraint voterKey ~ (choiceBallot ++ choiceKey)
constraint (voterKey ++ choiceBallot ++ choiceKey) ~ [Votes]
constraint (voterKey ++ choiceBallot) ~ [Client, Channel]
val amVoter : transaction (option $voterKey)
val maxVotesPerVoter : option int
val keyFilter : sql_exp [Choice = choiceBallot ++ choiceKey ++ choiceRest] [] [] bool
end) = struct
open M
val voterKeyEq : eq $voterKey = @@Record.eq [voterKey] voterKeyEq voterKeyFl
val voterKeyOrd : ord $voterKey = @@Record.ord [voterKey] voterKeyOrd voterKeyFl
val choiceKeyEq : eq $choiceKey = @@Record.eq [choiceKey] choiceKeyEq choiceKeyFl
val voterKeyInj' = @mp [sql_injectable_prim] [sql_injectable] @@sql_prim voterKeyFl voterKeyInj
val choiceKeyInj' = @mp [sql_injectable_prim] [sql_injectable] @@sql_prim choiceKeyFl choiceKeyInj
val choiceBallotInj' = @mp [sql_injectable_prim] [sql_injectable] @@sql_prim choiceBallotFl choiceBallotInj
open Option
table vote : (choiceBallot ++ choiceKey ++ voterKey ++ [Votes = int])
PRIMARY KEY {{@primary_key [choiceKey1] [choiceKeyR ++ choiceBallot ++ voterKey] ! !
(choiceKeyInj ++ choiceBallotInj ++ voterKeyInj)}},
{{one_constraint [#Choice] (@Sql.easy_foreign ! ! ! ! ! ! (@Folder.concat ! choiceBallotFl choiceKeyFl) choice)}},
{{one_constraint [#Voter] (@Sql.easy_foreign ! ! ! ! ! ! voterKeyFl voter)}}
type choice = {Key : $choiceKey,
Votes : source int,
MyVotes : source int}
datatype operation = Vote | Unvote
type action = { Operation : operation, IsItYou : bool, Choice : $choiceKey }
table listeners : (choiceBallot ++ voterKey ++ [Channel = channel action])
type input = _
type a = {Voter : $voterKey,
Ballot : $choiceBallot,
Choices : list choice,
Channel : channel action}
fun create r =
choices <- queryL ({{{sql_query1 [[]]
{Distinct = False,
From = @@sql_left_join [[]]
[[Choice = choiceBallot ++ choiceKey ++ choiceRest,
Vote = map option (choiceBallot ++ choiceKey ++ [Votes = int] ++ voterKey)]]
[[YourVote = map (fn t => (t, option t)) (choiceBallot ++ choiceKey ++ [Votes = int] ++ voterKey)]]
! ! !
{YourVote = @Top.mp [sql_injectable_prim] [fn t => nullify t (option t)]
@@nullify_prim (@Folder.concat ! (_ : folder [Votes = _])
(@Folder.concat !
(@Folder.concat ! choiceBallotFl choiceKeyFl)
voterKeyFl))
(_ ++ voterKeyInj
++ choiceBallotInj ++ choiceKeyInj)}
(@@sql_left_join [[]]
[[Choice = choiceBallot ++ choiceKey ++ choiceRest]]
[[Vote = map (fn t => (t, option t)) (choiceBallot ++ choiceKey ++ [Votes = int] ++ voterKey)]]
! ! !
{Vote = @Top.mp [sql_injectable_prim] [fn t => nullify t (option t)]
@@nullify_prim (@Folder.concat ! (_ : folder [Votes = _])
(@Folder.concat !
(@Folder.concat ! choiceBallotFl choiceKeyFl)
voterKeyFl))
(_ ++ voterKeyInj
++ choiceBallotInj ++ choiceKeyInj)}
(FROM choice) (FROM vote)
(WHERE {@@Sql.easy_join [#Choice] [#Vote]
[choiceKey] [choiceBallot ++ choiceRest]
[choiceBallot ++ [Votes = _] ++ voterKey]
[[]] [[]] [[]]
! ! ! ! choiceKeyFl}))
(FROM vote AS YourVote)
(WHERE {@@Sql.easy_join [#Choice] [#YourVote]
[choiceKey] [choiceBallot ++ choiceRest]
[choiceBallot ++ [Votes = _] ++ voterKey]
[[Vote = map option (choiceBallot ++ choiceKey ++ [Votes = int] ++ voterKey)]] [[]] [[]]
! ! ! ! choiceKeyFl}
AND {@@Sql.easy_where [#YourVote] [voterKey] [_]
[[Choice = _, Vote = map option (choiceBallot ++ choiceKey ++ [Votes = int] ++ voterKey)]] [_] [_]
! ! voterKeyInj' voterKeyFl r.Voter}),
Where = (WHERE {@@Sql.easy_where [#Choice] [choiceBallot] [_] [_] [_] [_]
! ! choiceBallotInj' choiceBallotFl r.Ballot}
AND {sql_exp_weaken keyFilter}),
GroupBy = sql_subset [[Choice = (choiceKey, _),
Vote = ([], _),
YourVote = ([], _)]],
Having = (WHERE TRUE),
SelectFields = sql_subset [[Choice = (choiceKey, _),
Vote = ([], _),
YourVote = ([], _)]],
SelectExps = {Votes = sql_window (SQL SUM(vote.Votes)),
MyVotes = sql_window (SQL SUM(YourVote.Votes))}} }}}
ORDER BY {{{@Sql.order_by choiceKeyFl
(@Sql.some_fields [#Choice] [choiceKey] ! ! choiceKeyFl)
sql_asc}}});
choices <- List.mapM
(fn {Choice = k, Votes = n, MyVotes = yn, ...} =>
s <- source (Option.get 0 n);
ys <- source (Option.get 0 yn);
return {Key = k, Votes = s, MyVotes = ys}) choices;
chan <- channel;
@@Sql.easy_insert [[Channel = channel action] ++ choiceBallot ++ voterKey] [_]
({Channel = _ : sql_injectable (channel action)} ++ choiceBallotInj' ++ voterKeyInj')
(@Folder.cons [#Channel] [_] ! (@Folder.concat ! choiceBallotFl voterKeyFl))
listeners ({Channel = chan} ++ r.Voter ++ r.Ballot);
return (r ++ {Choices = choices, Channel = chan})
fun onload a =
let
fun loop () =
act <- recv a.Channel;
(case act.Operation of
Vote =>
List.app (fn ch =>
if ch.Key <> act.Choice then
return ()
else
(votes <- Basis.get ch.Votes;
set ch.Votes (votes + 1);
if act.IsItYou then
(yourVotes <- Basis.get ch.MyVotes;
set ch.MyVotes (yourVotes + 1))
else
return ())) a.Choices
| Unvote =>
List.app (fn ch =>
if ch.Key <> act.Choice then
return ()
else
(votes <- Basis.get ch.Votes;
set ch.Votes (votes - 1);
if act.IsItYou then
(yourVotes <- Basis.get ch.MyVotes;
set ch.MyVotes (yourVotes - 1))
else
return ())) a.Choices);
loop ()
in
spawn (loop ())
end
fun del r =
v <- amVoter;
case v of
None => error <xml>Not authenticated as a voter</xml>
| Some v =>
oldCount <- oneOrNoRowsE1 (SELECT (vote.Votes)
FROM vote
WHERE {@@Sql.easy_where [#Vote] [choiceBallot ++ choiceKey ++ voterKey]
[[Votes = _]] [[]] [[]] [[]] ! !
(choiceBallotInj' ++ choiceKeyInj' ++ voterKeyInj')
(@Folder.concat ! choiceBallotFl
(@Folder.concat ! choiceKeyFl voterKeyFl))
(r.Ballot ++ r.Choice ++ v)});
case oldCount of
None => return ()
| Some 1 =>
dml (DELETE FROM vote
WHERE {@@Sql.easy_where [#T] [choiceBallot ++ choiceKey ++ voterKey]
[[Votes = _]] [[]] [[]] [[]] ! !
(choiceBallotInj' ++ choiceKeyInj' ++ voterKeyInj')
(@Folder.concat ! choiceBallotFl
(@Folder.concat ! choiceKeyFl voterKeyFl))
(r.Ballot ++ r.Choice ++ v)});
queryI1 (SELECT listeners.Channel, listeners.{{voterKey}}
FROM listeners
WHERE {@Sql.easy_where [#Listeners] ! ! choiceBallotInj' choiceBallotFl r.Ballot})
(fn l => send l.Channel {Operation = Unvote, IsItYou = (l -- #Channel = v), Choice = r.Choice})
| Some oldCount =>
dml (UPDATE vote
SET Votes = Votes - 1
WHERE {@@Sql.easy_where [#T] [choiceBallot ++ choiceKey ++ voterKey]
[[Votes = _]] [[]] [[]] [[]] ! !
(choiceBallotInj' ++ choiceKeyInj' ++ voterKeyInj')
(@Folder.concat ! choiceBallotFl
(@Folder.concat ! choiceKeyFl voterKeyFl))
(r.Ballot ++ r.Choice ++ v)});
queryI1 (SELECT listeners.Channel, listeners.{{voterKey}}
FROM listeners
WHERE {@Sql.easy_where [#Listeners] ! ! choiceBallotInj' choiceBallotFl r.Ballot})
(fn l => send l.Channel {Operation = Unvote, IsItYou = (l -- #Channel = v), Choice = r.Choice})
fun add r =
v <- amVoter;
case v of
None => error <xml>Not authenticated as a voter</xml>
| Some v =>
oldCount <- oneOrNoRowsE1 (SELECT (vote.Votes)
FROM vote
WHERE {@@Sql.easy_where [#Vote] [choiceBallot ++ choiceKey ++ voterKey]
[[Votes = _]] [[]] [[]] [[]] ! !
(choiceBallotInj' ++ choiceKeyInj' ++ voterKeyInj')
(@Folder.concat ! choiceBallotFl
(@Folder.concat ! choiceKeyFl voterKeyFl))
(r.Ballot ++ r.Choice ++ v)});
case oldCount of
None =>
@@Sql.easy_insert [choiceBallot ++ choiceKey ++ voterKey ++ [Votes = int]] [_]
({Votes = _} ++ choiceBallotInj' ++ choiceKeyInj' ++ voterKeyInj')
(@Folder.cons [#Votes] [_] ! (@Folder.concat ! choiceBallotFl
(@Folder.concat ! choiceKeyFl voterKeyFl)))
vote
(r.Ballot ++ r.Choice ++ v ++ {Votes = 1});
queryI1 (SELECT listeners.Channel, listeners.{{voterKey}}
FROM listeners
WHERE {@Sql.easy_where [#Listeners] ! ! choiceBallotInj' choiceBallotFl r.Ballot})
(fn l => send l.Channel {Operation = Vote, IsItYou = (l -- #Channel = v), Choice = r.Choice})
| Some n =>
if (case maxVotesPerVoter of
None => False
| Some m => n >= m) then
return ()
else
dml (UPDATE vote
SET Votes = Votes + 1
WHERE {@@Sql.easy_where [#T] [choiceBallot ++ choiceKey ++ voterKey]
[[Votes = _]] [[]] [[]] [[]] ! !
(choiceBallotInj' ++ choiceKeyInj' ++ voterKeyInj')
(@Folder.concat ! choiceBallotFl
(@Folder.concat ! choiceKeyFl voterKeyFl))
(r.Ballot ++ r.Choice ++ v)});
queryI1 (SELECT listeners.Channel, listeners.{{voterKey}}
FROM listeners
WHERE {@Sql.easy_where [#Listeners] ! ! choiceBallotInj' choiceBallotFl r.Ballot})
(fn l => send l.Channel {Operation = Vote, IsItYou = (l -- #Channel = v), Choice = r.Choice})
fun oneChoice showKey a ch = <xml>
<tr>
<td>
<dyn signal={votes <- signal ch.Votes;
myVotes <- signal ch.MyVotes;
return <xml>
<button class={if myVotes = 0 then
CLASS "disabled btn"
else
CLASS "btn btn-secondary"}
onclick={fn _ => rpc (del {Ballot = a.Ballot,
Choice = ch.Key})}>
<span class="glyphicon glyphicon-minus"/>
</button>
<button class={if (case maxVotesPerVoter of
None => False
| Some n => myVotes >= n) then
CLASS "disabled btn"
else
CLASS "btn btn-secondary"}
onclick={fn _ => rpc (add {Ballot = a.Ballot,
Choice = ch.Key})}>
<span class="glyphicon glyphicon-plus"/>
</button>
</xml>}/>
</td>
{if showKey then
<xml><td>{[ch.Key]}</td></xml>
else
<xml/>}
<td>
<dyn signal={votes <- signal ch.MyVotes;
return <xml>{[votes]}</xml>}/>
</td>
<td>
<dyn signal={votes <- signal ch.Votes;
return <xml>{[votes]}</xml>}/>
</td>
</tr>
</xml>
fun render _ a = <xml>
<table class="bs-table">
<thead><tr>
<th/>
<th>Choice</th>
<th>Your Vote</th>
<th>Total Votes</th>
</tr></thead>
<tbody>
{List.mapX (oneChoice True a) a.Choices}
</tbody>
</table>
<dyn signal={(count, choices) <- List.foldlM (fn ch (count, choices) =>
thisCount <- signal ch.Votes;
if thisCount > count then
return (thisCount, ch.Key :: [])
else if thisCount = count then
return (count, ch.Key :: choices)
else
return (count, choices))
(0, []) a.Choices;
if count = 0 then
return <xml/>
else
return <xml>
<h3>Current leader{case choices of
_ :: _ :: _ => <xml>s</xml>
| _ => <xml/>}, with <i>{[count]}</i> vote{case count of
1 => <xml/>
| _ => <xml>s</xml>}:</h3>
{List.mapX (fn ch => <xml>{[ch]}<br/></xml>) choices}
</xml>}/>
</xml>
fun notification _ _ = <xml></xml>
fun buttons _ _ = <xml></xml>
fun ui r = {Create = create r,
Onload = onload,
Render = render,
Notification = notification,
Buttons = buttons}
fun removeVotesFor r =
dml (DELETE FROM vote
WHERE {@@Sql.easy_where [#T] [choiceBallot ++ choiceKey] [voterKey ++ [Votes = _]]
[[]] [[]] [[]] ! !
(choiceBallotInj' ++ choiceKeyInj')
(@Folder.concat ! choiceBallotFl choiceKeyFl)
r})
end