summaryrefslogtreecommitdiff
path: root/demo/more/grid.ur
blob: 829fead0cf2a3e53010c53f06d29efb9c6eae23b (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
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}
                  
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}

functor Make(M : sig
                 type row
                 type key
                 val keyOf : row -> key

                 val list : transaction (list row)
                 val new : transaction row
                 val save : key -> row -> transaction unit
                 val delete : key -> transaction unit

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

                 val folder : folder cols

                 con aggregates :: {Type}
                 val aggregates : $(map (aggregateMeta row) aggregates)
                 val aggFolder : folder aggregates
             end) = struct
    style tabl
    style tr
    style th
    style td
    style agg

    fun make (row : M.row) [input] [filter] (m : colMeta' M.row input filter) : transaction input = m.Project row

    fun makeAll cols row = @@Monad.exec [transaction] _ [map snd3 M.cols]
                               (map2 [fst3] [colMeta M.row] [fn p => transaction (snd3 p)]
                                     (fn [p] data meta => make row [_] [_] (meta.Handlers data))
                                     [_] M.folder cols M.cols)
                               (@@Folder.mp [_] [_] M.folder)

    type grid = {Cols : $(map fst3 M.cols),
                 Rows : Dlist.dlist {Row : source M.row,
                                     Cols : source ($(map snd3 M.cols)),
                                     Updating : source bool,
                                     Selected : source bool},
                 Selection : source bool,
                 Filters : $(map thd3 M.cols),
                 Sort : source (option (M.row -> M.row -> bool))}

    fun newRow cols row =
        rowS <- source row;
        cols <- makeAll cols row;
        colsS <- source cols;
        ud <- source False;
        sd <- source False;
        return {Row = rowS,
                Cols = colsS,
                Updating = ud,
                Selected = sd}

    fun addRow cols rows row =
        r <- newRow cols row;
        Monad.ignore (Dlist.append rows r)

    val grid =
        cols <- Monad.mapR [colMeta M.row] [fst3]
                           (fn [nm :: Name] [p :: (Type * Type * Type)] meta => meta.Initialize)
                           [_] M.folder M.cols;

        filters <- Monad.mapR2 [colMeta M.row] [fst3] [thd3]
                               (fn [nm :: Name] [p :: (Type * Type * Type)] meta state =>
                                   (meta.Handlers state).CreateFilter)
                               [_] M.folder M.cols cols;

        rows <- Dlist.create;
        sel <- source False;
        sort <- source None;

        return {Cols = cols,
                Rows = rows,
                Selection = sel,
                Filters = filters,
                Sort = sort}

    fun sync {Cols = cols, Rows = rows, ...} =
        Dlist.clear rows;
        init <- rpc M.list;
        rs <- List.mapM (newRow cols) init;
        Dlist.replace rows rs

    fun render grid = <xml>
      <table class={tabl}>
        <tr class={tr}>
          <th/> <th/> <th/>
          {foldRX2 [fst3] [colMeta M.row] [_]
                   (fn [nm :: Name] [p :: (Type * Type * Type)] [rest :: {(Type * Type * Type)}] [[nm] ~ rest]
                                    data (meta : colMeta M.row p) =>
                       <xml><th class={th}>{[(meta.Handlers data).Header]}</th></xml>)
                   [_] M.folder grid.Cols M.cols}
        </tr>

        {Dlist.render (fn {Row = rowS, Cols = colsS, Updating = ud, Selected = sd} pos =>
                          let
                              val delete =
                                  Dlist.delete pos;
                                  row <- get rowS;
                                  rpc (M.delete (M.keyOf row))

                              val update = set ud True

                              val cancel =
                                  set ud False;
                                  row <- get rowS;
                                  cols <- makeAll grid.Cols row;
                                  set colsS cols
                                  
                              val save =
                                  cols <- get colsS;
                                  errors <- Monad.foldR3 [fst3] [colMeta M.row] [snd3] [fn _ => option string]
                                                         (fn [nm :: Name] [p :: (Type * Type * Type)] [rest :: {(Type * Type * Type)}]
                                                                          [[nm] ~ rest] data meta v errors =>
                                                             b <- current ((meta.Handlers data).Validate v);
                                                             return (if b then
                                                                         errors
                                                                     else
                                                                         case errors of
                                                                             None => Some ((meta.Handlers data).Header)
                                                                           | Some s => Some ((meta.Handlers data).Header
                                                                                             ^ ", " ^ s)))
                                                         None [_] M.folder grid.Cols M.cols cols;

                                  case errors of
                                      Some s => alert ("Can't save because the following columns have invalid values:\n"
                                                       ^ s)
                                    | None =>
                                      set ud False;
                                      row <- get rowS;
                                      row' <- Monad.foldR3 [fst3] [colMeta M.row] [snd3] [fn _ => M.row]
                                                           (fn [nm :: Name] [t :: (Type * Type * Type)]
                                                                            [rest :: {(Type * Type * Type)}]
                                                                            [[nm] ~ rest] data meta v row' =>
                                                               (meta.Handlers data).Update row' v)
                                                           row [_] M.folder grid.Cols M.cols cols;
                                      rpc (M.save (M.keyOf row) row');
                                      set rowS row';

                                      cols <- makeAll grid.Cols row';
                                      set colsS cols
                          in
                              <xml><tr class={tr}>
                                <td>
                                  <dyn signal={b <- signal grid.Selection;
                                               return (if b then
                                                           <xml><ccheckbox source={sd}/></xml>
                                                       else
                                                           <xml/>)}/>
                                </td>

                                <td>
                                  <dyn signal={b <- signal ud;
                                               return (if b then
                                                           <xml><button value="Save" onclick={save}/></xml>
                                                       else
                                                           <xml><button value="Update" onclick={update}/></xml>)}/>
                                </td>

                                <td><dyn signal={b <- signal ud;
                                                 return (if b then
                                                             <xml><button value="Cancel" onclick={cancel}/></xml>
                                                         else
                                                             <xml><button value="Delete" onclick={delete}/></xml>)}/>
                                </td>

                                <dyn signal={cols <- signal colsS;
                                             return (foldRX3 [fst3] [colMeta M.row] [snd3] [_]
                                                             (fn [nm :: Name] [t :: (Type * Type * Type)]
                                                                              [rest :: {(Type * Type * Type)}]
                                                                              [[nm] ~ rest] data meta v =>
                                                                 <xml><td class={td}>
                                                                   <dyn signal={b <- signal ud;
                                                                                return (if b then
                                                                                            (meta.Handlers data).Edit v
                                                                                        else
                                                                                            (meta.Handlers data).Display
                                                                                                                v)}/>
                                                                   <dyn signal={b <- signal ud;
                                                                                if b then
                                                                                    valid <-
                                                                                    (meta.Handlers data).Validate v;
                                                                                    return (if valid then
                                                                                                <xml/>
                                                                                            else
                                                                                                <xml>!</xml>)
                                                                                else
                                                                                    return <xml/>}/>
                                                                 </td></xml>)
                                                             [_] M.folder grid.Cols M.cols cols)}/>
                                </tr></xml>
                          end)
                      {Filter = fn all =>
                                   row <- signal all.Row;
                                   foldR3 [colMeta M.row] [fst3] [thd3] [fn _ => M.row -> signal bool]
                                          (fn [nm :: Name] [p :: (Type * Type * Type)]
                                                           [rest :: {(Type * Type * Type)}] [[nm] ~ rest]
                                                           meta state filter combinedFilter row =>
                                              previous <- combinedFilter row;
                                              this <- (meta.Handlers state).Filter filter row;
                                              return (previous && this))
                                          (fn _ => return True)
                                          [_] M.folder M.cols grid.Cols grid.Filters row,
                       Sort = f <- signal grid.Sort;
                              return (Option.mp (fn f r1 r2 => r1 <- signal r1.Row;
                                                    r2 <- signal r2.Row;
                                                    return (f r1 r2)) f)}
                      grid.Rows}

            <dyn signal={rows <- Dlist.foldl (fn row => Monad.mapR2 [aggregateMeta M.row] [id] [id]
                                                                    (fn [nm :: Name] [t :: Type] meta acc =>
                                                                        Monad.mp (fn v => meta.Step v acc)
                                                                                 (signal row.Row))
                                                                    [_] M.aggFolder M.aggregates)
                                 (mp [aggregateMeta M.row] [id]
                                  (fn [t] meta => meta.Initial)
                                  [_] M.aggFolder M.aggregates) grid.Rows;
                         return <xml><tr>
                           <th colspan={3}>Aggregates</th>
                           {foldRX2 [aggregateMeta M.row] [id] [_]
                                    (fn [nm :: Name] [t :: Type] [rest :: {Type}] [[nm] ~ rest] meta acc =>
                                        <xml><td class={agg}>{meta.Display acc}</td></xml>)
                                    [_] M.aggFolder M.aggregates rows}
                         </tr></xml>}/>

              <tr><th colspan={3}>Filters</th>
                {foldRX3 [colMeta M.row] [fst3] [thd3] [_]
                 (fn [nm :: Name] [p :: (Type * Type * Type)] [rest :: {(Type * Type * Type)}] [[nm] ~ rest]
                                  meta state filter => <xml><td>{(meta.Handlers state).DisplayFilter filter}</td></xml>)
                 [_] M.folder M.cols grid.Cols grid.Filters}
              </tr>
          </table>
          
          <button value="New row" onclick={row <- rpc M.new;
                                           addRow grid.Cols grid.Rows row}/>
          <button value="Refresh" onclick={sync grid}/>
    </xml>

    fun showSelection grid = grid.Selection

    fun selection grid = Dlist.foldl (fn {Row = rowS, Selected = sd, ...} ls =>
                                         sd <- signal sd;
                                         if sd then
                                             row <- signal rowS;
                                             return (row :: ls)
                                         else
                                             return ls) [] grid.Rows
end