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finalGrades.ur
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open Bootstrap3
datatype access = Forbidden | Read | Write
fun accessToInt x =
case x of
Forbidden => 0
| Read => 1
| Write => 2
val access_ord : ord access = mkOrd {Lt = fn x y => accessToInt x < accessToInt y,
Le = fn x y => accessToInt x <= accessToInt y}
functor Make(M : sig
con key1 :: Name
type keyT
con keyR :: {Type}
constraint [key1] ~ keyR
con key = [key1 = keyT] ++ keyR
con rest :: {Type}
constraint key ~ rest
constraint key ~ [Grade, Min, Max]
con keyName :: Name
con otherConstraints :: {{Unit}}
constraint [keyName] ~ otherConstraints
val tab : sql_table (key ++ rest) ([keyName = map (fn _ => ()) key] ++ otherConstraints)
val filter : sql_exp [Tab = key ++ rest] [] [] bool
val inj : $(map sql_injectable_prim key)
val fl : folder key
val keyShow : show $key
val keyEq : $(map eq key)
type summaries
type summary
val summary : summaries -> $key -> summary
val ord_summary : ord summary
val show_summary : show summary
val eq_summary : eq summary
val inj_summary : sql_injectable_prim summary
con grades :: {Unit}
val grades : $(mapU string grades)
val gfl : folder grades
val keyLabel : string
val summaryLabel : string
val gradeLabel : string
val access : transaction access
end) = struct
open M
type grade = variant (mapU unit grades)
val keyEq : eq $key = @@Record.eq [key] keyEq fl
val gradeEq : eq grade = @@Variant.eq [mapU unit grades]
(@map0 [fn _ => eq unit] (fn [u ::_] => mkEq (fn () () => True)) gfl)
(@Folder.mp gfl)
val inj' = @mp [sql_injectable_prim] [sql_injectable] @@sql_prim fl inj
table specialCase : (key ++ [Grade = serialized grade])
PRIMARY KEY {{@primary_key [key1] [keyR ] ! ! inj}},
{{one_constraint [#Key] (@Sql.easy_foreign ! ! ! ! ! ! fl tab)}}
table ranges : {Min : summary, Max : summary, Grade : serialized grade}
PRIMARY KEY (Min, Max)
type input = summaries
datatype change =
SpecialCase of $key * option grade
| Ranges of list (summary * summary * grade)
type entry = $key
* summary
* source (option (source string))
(* A blank to solicit a new range boundary *)
* source (option grade)
(* Current special-case grade, if any *)
* source (option (source string))
(* A blank to solicit a new special-case grade *)
type a = {Entries : list entry,
Ranges : source (list (summary * summary * grade)),
Channel : channel change}
table listeners : {Channel : channel change}
fun create sms =
keys <- List.mapQueryM ({{{sql_query1 [[]]
{Distinct = False,
From = @@sql_left_join [[]]
[[Tab = key ++ rest]]
[[SpecialCase = map (fn t => (t, option t)) (key ++ [Grade = serialized grade])]]
! ! !
{SpecialCase = @Top.mp [sql_injectable_prim] [fn t => nullify t (option t)]
@@nullify_prim (@Folder.concat ! (_ : folder [Grade = _]) fl)
(_ ++ inj)}
(FROM tab) (FROM specialCase)
(WHERE {@@Sql.easy_join [#Tab] [#SpecialCase]
[key] [rest] [[Grade = _]]
[[]] [[]] [[]]
! ! ! ! fl}),
Where = sql_exp_weaken filter,
GroupBy = sql_subset_all [_],
Having = (WHERE TRUE),
SelectFields = sql_subset [[Tab = (key, _),
SpecialCase = ([Grade = _], _)]],
SelectExps = {}} }}})
(fn r =>
rb <- source None;
gr <- source (Option.mp deserialize r.SpecialCase.Grade);
newgr <- source None;
return (r.Tab, summary sms r.Tab, rb, gr, newgr));
keys <- return (List.sort (fn (_, sm1, _, _, _) (_, sm2, _, _, _) => sm1 < sm2) keys);
ranges <- List.mapQuery (SELECT *
FROM ranges
ORDER BY ranges.Max DESC, ranges.Min DESC)
(fn {Ranges = r} => (r.Min, r.Max, deserialize r.Grade));
ranges <- source ranges;
ch <- channel;
dml (INSERT INTO listeners(Channel)
VALUES ({[ch]}));
return {Entries = keys, Ranges = ranges, Channel = ch}
fun onload a =
let
fun loop () =
change <- recv a.Channel;
(case change of
SpecialCase (key, g) =>
List.app (fn (key', _, s1, sg, s2) =>
if key' = key then
set s1 None;
set sg g;
set s2 None
else
return ()) a.Entries
| Ranges rs => set a.Ranges rs);
loop ()
in
spawn (loop ())
end
fun skipRanges sm ranges =
case ranges of
[] => []
| (min, _, _) :: ranges' =>
if min > sm then
skipRanges sm ranges'
else
ranges
val checkAccess =
level <- access;
if level < Write then
error <xml>Access denied</xml>
else
return ()
fun setRanges rs =
checkAccess;
dml (DELETE FROM ranges
WHERE TRUE);
List.app (fn (min, max, g) => debug ("[" ^ show min ^ "," ^ show max ^ "]"); dml (INSERT INTO ranges(Min, Max, Grade)
VALUES ({[min]}, {[max]}, {[serialize g]}))) rs;
queryI1 (SELECT * FROM listeners)
(fn r => send r.Channel (Ranges rs))
fun setSpecialCase (key : $key) g =
checkAccess;
dml (DELETE FROM specialCase
WHERE {@@Sql.easy_where [#T] [key] [[Grade = _]] [[]] [[]] [[]] ! ! inj' fl key});
(case g of
None => return ()
| Some g => @@Sql.easy_insert [key ++ [Grade = _]] [_] (inj' ++ {Grade = _})
(@Folder.cons [#Grade] [_] ! fl) specialCase (key ++ {Grade = serialize g}));
queryI1 (SELECT * FROM listeners)
(fn r => send r.Channel (SpecialCase (key, g)))
fun render' allRanges lastSm ranges (keys : list entry) =
case keys of
[] => <xml></xml>
| (key, sm, rb, gr, newgr) :: keys' =>
let
val ranges = skipRanges sm ranges
in
<xml><tr>
<td>
<dyn signal={rbv <- signal rb;
return (case rbv of
Some rbs => <xml>
<cselect source={rbs}>
<coption></coption>
{@mapUX [string] [_]
(fn [nm ::_] [r ::_] [[nm] ~ r] name => <xml>
<coption>First {[name]}</coption>
<coption>Last {[name]}</coption>
</xml>)
gfl grades}
</cselect>
<button class="btn btn-sm glyphicon glyphicon-ok"
onclick={fn _ =>
set rb None;
rbv <- get rbs;
case String.split rbv #" " of
None =>
grs <- get allRanges;
let
val ars' = List.filter (fn (min, _, _) => min <> sm) grs
in
set allRanges ars';
rpc (setRanges ars')
end
| Some (which, g) =>
case @Variant.fromString gfl grades g of
None => error <xml>FinalGrades: Unknown grade string</xml>
| Some g =>
case which of
"Last" =>
ar <- get allRanges;
let
fun setFirst' ranges =
case ranges of
[] => (sm, sm, g) :: []
| (min, max, g') :: ranges' =>
if min < sm then
(sm, sm, g) :: ranges
else
(min, max, g') :: setFirst' ranges'
fun setFirst ranges acc =
case ranges of
[] => setFirst' ar
| (min, max, g') :: ranges' =>
if g' = g then
List.revAppend acc ((sm, max, g) :: ranges')
else
setFirst ranges' ((min, max, g') :: acc)
val ar' = setFirst ar []
in
set allRanges ar';
rpc (setRanges ar')
end
| "First" =>
ar <- get allRanges;
let
fun setLast' ranges =
case ranges of
[] => (sm, sm, g) :: []
| (min, max, g') :: ranges' =>
if min < sm then
(sm, sm, g) :: ranges
else
(min, max, g') :: setLast' ranges'
fun setLast ranges acc =
case ranges of
[] => setLast' ar
| (min, max, g') :: ranges' =>
if g' = g then
List.revAppend acc ((min, sm, g) :: ranges')
else
setLast ranges' ((min, max, g') :: acc)
val ar' = setLast ar []
in
set allRanges ar';
rpc (setRanges ar')
end
| _ => error <xml>FinalGrades: Unknown bound spec</xml>}/>
<button class="btn btn-sm glyphicon glyphicon-remove"
onclick={fn _ => set rb None}/>
</xml>
| None =>
let
val rng =
case ranges of
[] => ""
| (min, max, g) :: _ =>
if sm = max && (case keys' of
(_, sm', _, _, _) :: _ => sm' <> sm
| [] => True) then
"First " ^ @Record.select [fn _ => string] [fn _ => unit]
gfl (fn [t] (lab : string) () => lab)
grades g
else if sm = min && lastSm <> Some sm then
"Last " ^ @Record.select [fn _ => string] [fn _ => unit]
gfl (fn [t] (lab : string) () => lab)
grades g
else
""
in
<xml>
{[rng]}
<button class="btn btn-sm glyphicon glyphicon-pencil"
onclick={fn _ =>
s <- source rng;
set rb (Some s)}/>
</xml>
end)}/>
</td>
<td>
<dyn signal={newgrv <- signal newgr;
case newgrv of
None =>
grv <- signal gr;
return (case grv of
Some g =>
let
val text = @Record.select [fn _ => string] [fn _ => unit]
gfl (fn [t] (lab : string) () => lab)
grades g
in
<xml>
*{[text]}
<button class="btn btn-sm glyphicon glyphicon-pencil"
onclick={fn _ =>
s <- source text;
set newgr (Some s)}/>
</xml>
end
| None =>
case ranges of
[] => <xml>
-
<button class="btn btn-sm glyphicon glyphicon-pencil"
onclick={fn _ =>
s <- source "";
set newgr (Some s)}/>
</xml>
| (min, max, g) :: _ =>
if min <= sm && sm <= max then
let
val text = @Record.select [fn _ => string] [fn _ => unit]
gfl (fn [t] (lab : string) () => lab)
grades g
in
<xml>
{[text]}
<button class="btn btn-sm glyphicon glyphicon-pencil"
onclick={fn _ =>
s <- source text;
set newgr (Some s)}/>
</xml>
end
else
<xml>
-
<button class="btn btn-sm glyphicon glyphicon-pencil"
onclick={fn _ =>
s <- source "";
set newgr (Some s)}/>
</xml>)
| Some gs =>
grv <- signal gr;
return <xml>
<cselect source={gs}>
<coption></coption>
{@mapUX [string] [_]
(fn [nm ::_] [r ::_] [[nm] ~ r] name => <xml>
<coption>{[name]}</coption>
</xml>)
gfl grades}
</cselect>
<button class="btn btn-sm glyphicon glyphicon-ok"
onclick={fn _ =>
set newgr None;
g <- get gs;
g <- return (@Variant.fromString gfl grades g);
set gr g;
rpc (setSpecialCase key g)}/>
<button class="btn btn-sm glyphicon glyphicon-remove"
onclick={fn _ => set newgr None}/>
</xml>}/>
</td>
<td>{[sm]}</td>
<td>{[key]}</td>
</tr>{render' allRanges (Some sm) ranges keys'}</xml>
end
fun render ctx (a : a) = <xml>
<table class="bs3-table table-striped">
<tr>
<th>Range?</th>
<th>{[gradeLabel]}</th>
<th>{[summaryLabel]}</th>
<th>{[keyLabel]}</th>
</tr>
<dyn signal={ranges <- signal a.Ranges;
return (render' a.Ranges None ranges a.Entries)}/>
</table>
</xml>
fun ui sms = {Create = create sms,
Onload = onload,
Render = render}
fun grades sms =
ranges <- queryL1 (SELECT *
FROM ranges
ORDER BY ranges.Min DESC, ranges.Max DESC);
List.mapQuery ({{{sql_query1 [[]]
{Distinct = False,
From = @@sql_left_join [[]]
[[Tab = key ++ rest]]
[[SpecialCase = map (fn t => (t, option t)) (key ++ [Grade = serialized grade])]]
! ! !
{SpecialCase = @Top.mp [sql_injectable_prim] [fn t => nullify t (option t)]
@@nullify_prim (@Folder.concat ! (_ : folder [Grade = _]) fl)
(_ ++ inj)}
(FROM tab) (FROM specialCase)
(WHERE {@@Sql.easy_join [#Tab] [#SpecialCase]
[key] [rest] [[Grade = _]]
[[]] [[]] [[]]
! ! ! ! fl}),
Where = sql_exp_weaken filter,
GroupBy = sql_subset_all [_],
Having = (WHERE TRUE),
SelectFields = sql_subset [[Tab = (key, _),
SpecialCase = ([Grade = _], _)]],
SelectExps = {}} }}}
ORDER BY {{{@Sql.order_by fl
(@Sql.some_fields [#Tab] [key] ! ! fl)
sql_asc}}})
(fn r =>
let
val sm = summary sms r.Tab
fun tryRanges ranges =
case ranges of
[] => error <xml>No grade chosen yet for {[r.Tab]}</xml>
| r :: ranges' =>
if r.Min <= sm && sm <= r.Max then
deserialize r.Grade
else
tryRanges ranges'
in
(r.Tab, case r.SpecialCase.Grade of
None => tryRanges ranges
| Some g => deserialize g)
end)
end