summaryrefslogtreecommitdiff
path: root/demo/more/dbgrid.ur
blob: b6cd94aef41fb2b51730e3e3d7f00192be3e118e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
con rawMeta = fn t :: Type =>
                 {New : transaction t,
                  Inj : sql_injectable t}

con colMeta' = fn (row :: {Type}) (input :: Type) (filter :: Type) =>
                  {Header : string,
                   Project : $row -> transaction input,
                   Update : $row -> input -> transaction ($row),
                   Display : input -> xbody,
                   Edit : input -> xbody,
                   Validate : input -> signal bool,
                   CreateFilter : transaction filter,
                   DisplayFilter : filter -> xbody,
                   Filter : filter -> $row -> signal bool,
                   Sort : option ($row -> $row -> bool)}

con colMeta = fn (row :: {Type}) (global_input_filter :: (Type * Type * Type)) =>
                 {Initialize : transaction global_input_filter.1,
                  Handlers : global_input_filter.1 -> colMeta' row global_input_filter.2 global_input_filter.3}

con aggregateMeta = fn (row :: {Type}) (acc :: Type) =>
                       {Initial : acc,
                        Step : $row -> acc -> acc,
                        Display : acc -> xbody}

structure Direct = struct
    con metaBase = fn actual_input_filter :: (Type * Type * Type) =>
                  {Display : actual_input_filter.2 -> xbody,
                   Edit : actual_input_filter.2 -> xbody,
                   Initialize : actual_input_filter.1 -> transaction actual_input_filter.2,
                   Parse : actual_input_filter.2 -> signal (option actual_input_filter.1),
                   CreateFilter : transaction actual_input_filter.3,
                   DisplayFilter : actual_input_filter.3 -> xbody,
                   Filter : actual_input_filter.3 -> actual_input_filter.1 -> signal bool,
                   Sort : actual_input_filter.1 -> actual_input_filter.1 -> bool}

    datatype metaBoth actual input filter =
             NonNull of metaBase (actual, input, filter) * metaBase (option actual, input, filter)
           | Nullable of metaBase (actual, input, filter)

    con meta = fn global_actual_input_filter :: (Type * Type * Type * Type) =>
                  {Initialize : transaction global_actual_input_filter.1,
                   Handlers : global_actual_input_filter.1
                              -> metaBoth global_actual_input_filter.2 global_actual_input_filter.3
                                          global_actual_input_filter.4}

    con editableState (ts :: (Type * Type * Type * Type)) = (ts.1, ts.3, ts.4)
    fun editable [ts] [rest] [nm :: Name] [[nm] ~ rest] name (m : meta ts) : colMeta ([nm = ts.2] ++ rest)
                                                                                     (editableState ts) =
       let
           fun doMr mr = {Header = name,
                          Project = fn r => mr.Initialize r.nm,
                          Update = fn r s =>
                                      vo <- current (mr.Parse s);
                                      return (case vo of
                                                  None => r
                                                | Some v => r -- nm ++ {nm = v}),
                          Display = mr.Display,
                          Edit = mr.Edit,
                          Validate = fn s => vo <- mr.Parse s; return (Option.isSome vo),
                          CreateFilter = mr.CreateFilter,
                          DisplayFilter = mr.DisplayFilter,
                          Filter = fn i r => mr.Filter i r.nm,
                          Sort = Some (fn r1 r2 => mr.Sort r1.nm r2.nm)} 
       in
           {Initialize = m.Initialize,
            Handlers = fn data => case m.Handlers data of
                                  NonNull (mr, _) => doMr mr
                                | Nullable mr => doMr mr}
       end
        
    con readOnlyState (ts :: (Type * Type * Type * Type)) = (ts.1, ts.3, ts.4)
    fun readOnly [ts] [rest] [nm :: Name] [[nm] ~ rest] name (m : meta ts) : colMeta ([nm = ts.2] ++ rest)
                                                                                     (readOnlyState ts) =
       let
           fun doMr mr = {Header = name,
                          Project = fn r => mr.Initialize r.nm,
                          Update = fn r _ => return r,
                          Display = mr.Display,
                          Edit = mr.Display,
                          Validate = fn _ => return True,
                          CreateFilter = mr.CreateFilter,
                          DisplayFilter = mr.DisplayFilter,
                          Filter = fn i r => mr.Filter i r.nm,
                          Sort = Some (fn r1 r2 => mr.Sort r1.nm r2.nm)}
       in
           {Initialize = m.Initialize,
            Handlers = fn data => case m.Handlers data of
                                      NonNull (mr, _) => doMr mr
                                    | Nullable mr => doMr mr}
       end

    con metaBasic = fn actual_input_filter :: (Type * Type * Type) =>
                       {Display : actual_input_filter.2 -> xbody,
                        Edit : source actual_input_filter.2 -> xbody,
                        Initialize : actual_input_filter.1 -> actual_input_filter.2,
                        InitializeNull : actual_input_filter.2,
                        IsNull : actual_input_filter.2 -> bool,
                        Parse : actual_input_filter.2 -> option actual_input_filter.1,
                        CreateFilter : actual_input_filter.3,
                        DisplayFilter : source actual_input_filter.3 -> xbody,
                        Filter : actual_input_filter.3 -> actual_input_filter.1 -> bool,
                        FilterIsNull : actual_input_filter.3 -> bool,
                        Sort : actual_input_filter.1 -> actual_input_filter.1 -> bool}

    con basicState = source
    con basicFilter = source
    fun basic [ts ::: (Type * Type * Type)] (m : metaBasic ts) : meta (unit, ts.1, basicState ts.2, basicFilter ts.3) =
        {Initialize = return (),
         Handlers = fn () => NonNull (
                             {Display = fn s => <xml><dyn signal={v <- signal s; return (m.Display v)}/></xml>,
                              Edit = m.Edit,
                              Initialize = fn v => source (m.Initialize v),
                              Parse = fn s => v <- signal s; return (m.Parse v),
                              CreateFilter = source m.CreateFilter,
                              DisplayFilter = m.DisplayFilter,
                              Filter = fn f v => f <- signal f;
                                          return (if m.FilterIsNull f then
                                                      True
                                                  else
                                                      m.Filter f v),
                              Sort = m.Sort},
                             {Display = fn s => <xml><dyn signal={v <- signal s; return (m.Display v)}/></xml>,
                              Edit = m.Edit,
                              Initialize = fn v => source (case v of
                                                       None => m.InitializeNull
                                                     | Some v => m.Initialize v),
                              Parse = fn s => v <- signal s;
                                         return (if m.IsNull v then
                                                     Some None
                                                 else
                                                     case m.Parse v of
                                                         None => None
                                                       | Some v' => Some (Some v')),
                              CreateFilter = source m.CreateFilter,
                              DisplayFilter = m.DisplayFilter,
                              Filter = fn f v => f <- signal f;
                                          return (if m.FilterIsNull f then
                                                      True
                                                  else
                                                      case v of
                                                          None => False
                                                        | Some v => m.Filter f v),
                              Sort = fn x y =>
                                        case (x, y) of
                                            (None, _) => True
                                          | (Some x', Some y') => m.Sort x' y'
                                          | _ => False})}

    fun nullable [global] [actual] [input] [filter] (m : meta (global, actual, input, filter)) =
        {Initialize = m.Initialize,
         Handlers = fn d => case m.Handlers d of
                                Nullable _ => error <xml>Don't stack calls to Direct.nullable!</xml>
                              | NonNull (_, ho) => Nullable ho}

    type intGlobal = unit
    type intInput = basicState string
    type intFilter = basicFilter string
    val int : meta (intGlobal, int, intInput, intFilter) =
        basic {Display = fn s => <xml>{[s]}</xml>,
               Edit = fn s => <xml><ctextbox size={5} source={s}/></xml>,
               Initialize = fn n => show n,
               InitializeNull = "",
               IsNull = eq "",
               Parse = fn v => read v,
               CreateFilter = "",
               DisplayFilter = fn s => <xml><ctextbox size={5} source={s}/></xml> : xbody,
               Filter = fn s n =>
                           case read s of
                               None => True
                             | Some n' => n' = n,
               FilterIsNull = eq "",
               Sort = le}

    type stringGlobal = unit
    type stringInput = basicState string
    type stringFilter = basicFilter string
    val string : meta (stringGlobal, string, stringInput, stringFilter) =
        basic {Display = fn s => <xml>{[s]}</xml>,
               Edit = fn s => <xml><ctextbox source={s}/></xml>,
               Initialize = fn s => s,
               InitializeNull = "",
               IsNull = eq "",
               Parse = fn s => Some s,
               CreateFilter = "",
               DisplayFilter = fn s => <xml><ctextbox source={s}/></xml> : xbody,
               Filter = fn s n =>
                           case read s of
                               None => True
                             | Some n' => n' = n,
               FilterIsNull = eq "",
               Sort = le}

    type boolGlobal = unit
    type boolInput = basicState bool
    type boolFilter = basicFilter string
    val bool : meta (boolGlobal, bool, boolInput, boolFilter) =
        basic {Display = fn b => <xml>{[b]}</xml>,
               Edit = fn s => <xml><ccheckbox source={s}/></xml>,
               Initialize = fn b => b,
               InitializeNull = False,
               IsNull = fn _ => False,
               Parse = fn b => Some b,
               CreateFilter = "",
               DisplayFilter = fn s => <xml><cselect source={s}>
                 <coption/>
                 <coption value="0">False</coption>
                 <coption value="1">True</coption>
               </cselect></xml> : xbody,
               Filter = fn s b =>
                           case s of
                               "0" => b = False
                             | "1" => b = True
                             | _ => True,
               FilterIsNull = eq "",
               Sort = le}

    functor Foreign (M : sig
                         con row :: {Type}
                         con t :: Type
                         val show_t : show t
                         val read_t : read t
                         val eq_t : eq t
                         val ord_t : ord t
                         val inj_t : sql_injectable t
                         con nm :: Name
                         constraint [nm] ~ row
                         table tab : ([nm = t] ++ row)
                         val render : $([nm = t] ++ row) -> string
                     end) = struct
        open M

        type global = list (t * string)
        type input = source string * option (t * $row)
        type filter = source string

        val getChoices = List.mapQuery (SELECT * FROM tab AS T)
                                       (fn r => (r.T.nm, render r.T))

        fun getChoice k =
            r <- oneRow (SELECT T.{{row}} FROM tab AS T WHERE T.{nm} = {[k]});
            return r.T

        val meta : meta (global, M.t, input, filter) =
            {Initialize = getChoices,
             Handlers = fn choices =>
                           NonNull (
                           {Display = fn (_, kr) => case kr of
                                                          None => error <xml>Unexpected Foreign null</xml>
                                                        | Some (k, r) => <xml>{[render ({nm = k} ++ r)]}</xml>,
                            Edit = fn (s, kr) => 
                                      <xml><cselect source={s}>
                                        {List.mapX (fn (k', rend) =>
                                                       <xml><coption value={show k'} selected={case kr of
                                                                                                   None => False
                                                                                                 | Some (k, _) =>
                                                                                                   k' = k}>{[rend]}</coption>
                                                       </xml>)
                                                   choices}
                                      </cselect></xml>,
                            Initialize = fn k => s <- source (show k);
                                            r <- rpc (getChoice k);
                                            return (s, Some (k, r)),
                            Parse = fn (s, _) => k <- signal s; return (read k : option t),
                            CreateFilter = source "",
                            DisplayFilter = fn s => 
                                               <xml><cselect source={s}>
                                                 <coption/>
                                                 {List.mapX (fn (k, rend) =>
                                                                <xml><coption value={show k}>{[rend]}</coption></xml>)
                                                            choices}
                                               </cselect></xml> : xbody,
                            Filter = fn s k => s <- signal s;
                                        return (case read s : option t of
                                                    None => True
                                                  | Some k' => k' = k),
                            Sort = le},
                           {Display = fn (_, kr) => case kr of
                                                          None => <xml>NULL</xml>
                                                        | Some (k, r) => <xml>{[render ({nm = k} ++ r)]}</xml>,
                            Edit = fn (s, kr) => 
                                      <xml><cselect source={s}>
                                        <coption value="" selected={case kr of
                                                                        None => True
                                                                      | _ => False}>NULL</coption>
                                        {List.mapX (fn (k', rend) =>
                                                       <xml><coption value={show k'} selected={case kr of
                                                                                                   None => False
                                                                                                 | Some (k, _) =>
                                                                                                   k' = k}>{[rend]}</coption>
                                                       </xml>)
                                                   choices}
                                      </cselect></xml>,
                            Initialize = fn k => case k of
                                                     None =>
                                                     s <- source "";
                                                     return (s, None)
                                                   | Some k =>
                                                     s <- source (show k);
                                                     r <- rpc (getChoice k);
                                                     return (s, Some (k, r)),
                            Parse = fn (s, _) => ks <- signal s;
                                       return (case ks of
                                                   "" => Some None
                                                 | _ => case read ks : option t of
                                                            None => None
                                                          | Some k => Some (Some k)),
                            CreateFilter = source "",
                            DisplayFilter = fn s => 
                                               <xml><cselect source={s}>
                                                 <coption/>
                                                 <coption value="0">NULL</coption>
                                                 {List.mapX (fn (k, rend) =>
                                                                <xml><coption value={"1" ^ show k}>{[rend]}</coption>
                                                                </xml>)
                                                            choices}
                                               </cselect></xml> : xbody,
                            Filter = fn s ko => s <- signal s;
                                        return (case s of
                                                    "" => True
                                                  | "0" => ko = None
                                                  | _ =>
                                                    case read (String.substring s {Start = 1,
                                                                                   Len = String.length s - 1})
                                                         : option t of
                                                        None => True
                                                      | Some k => ko = Some k),
                            Sort = le})}
    end
end

con computedState = (unit, xbody, unit)
fun computed [row] [t] (_ : show t) name (f : $row -> t) : colMeta row computedState =
    {Initialize = return (),
     Handlers = fn () => {Header = name,
                          Project = fn r => return <xml>{[f r]}</xml>,
                          Update = fn r _ => return r,
                          Display = fn x => x,
                          Edit = fn _ => <xml>...</xml>,
                          Validate = fn _ => return True,
                          CreateFilter = return (),
                          DisplayFilter = fn _ => <xml/>,
                          Filter = fn _ _ => return True,
                          Sort = None}}
fun computedHtml [row] name (f : $row -> xbody) : colMeta row computedState =
    {Initialize = return (),
     Handlers = fn () => {Header = name,
                          Project = fn r => return (f r),
                          Update = fn r _ => return r,
                          Display = fn x => x,
                          Edit = fn _ => <xml>...</xml>,
                          Validate = fn _ => return True,
                          CreateFilter = return (),
                          DisplayFilter = fn _ => <xml/>,
                          Filter = fn _ _ => return True,
                          Sort = None}}

functor Make(M : sig
                 con key :: {Type}
                 con row :: {Type}
                 constraint key ~ row
                 table tab : (key ++ row)

                 val raw : $(map rawMeta (key ++ row))

                 con cols :: {(Type * Type * Type)}
                 val cols : $(map (colMeta (key ++ row)) cols)

                 val keyFolder : folder key
                 val rowFolder : folder row
                 val colsFolder : folder cols

                 con aggregates :: {Type}
                 val aggregates : $(map (aggregateMeta (key ++ row)) aggregates)
                 val aggFolder : folder aggregates

                 val pageLength : option int
             end) = struct
    open Grid.Make(struct
                       fun keyOf r = r --- M.row

                       val list = query (SELECT * FROM {{M.tab}} AS T) (fn r rs => return (r.T :: rs)) []

                       val wholeRow = @Folder.concat ! M.keyFolder M.rowFolder

                       fun ensql [env] (r : $(M.key ++ M.row)) =
                           @map2 [rawMeta] [id] [sql_exp env [] []]
                            (fn [t] meta v => @sql_inject meta.Inj v)
                            wholeRow M.raw r

                       val new =
                           row <- @Monad.mapR _ [rawMeta] [id]
                                   (fn [nm :: Name] [t :: Type] meta => meta.New)
                                   wholeRow M.raw;
                           dml (insert M.tab (ensql row));
                           return row

                       fun selector (r : $M.key) : sql_exp [T = M.key ++ M.row] [] [] bool =
                         @foldR2 [rawMeta] [id]
                          [fn key => rest :: {Type} -> [rest ~ key] => sql_exp [T = key ++ rest] [] [] bool]
                          (fn [nm :: Name] [t :: Type] [key :: {Type}] [[nm] ~ key]
                                           (meta : rawMeta t) (v : t)
                                           (exp : rest :: {Type} -> [rest ~ key] => sql_exp [T = key ++ rest] [] [] bool)
                                           [rest :: {Type}] [rest ~ [nm = t] ++ key] =>
                              (WHERE T.{nm} = {@sql_inject meta.Inj v} AND {exp [[nm = t] ++ rest] !}))
                          (fn [rest :: {Type}] [rest ~ []] => (WHERE TRUE))
                          M.keyFolder (M.raw --- map rawMeta M.row) r
                          [_] !

                       fun save key row =
                           dml (update [M.key ++ M.row]
                                       (ensql row)
                                       M.tab
                                       (selector key))

                       fun delete key =
                           dml (Basis.delete M.tab (selector key))

                       val cols = M.cols

                       val folder = M.colsFolder

                       val aggregates = M.aggregates

                       val aggFolder = M.aggFolder

                       val pageLength = M.pageLength
                   end)
end