adamc@421: con colMeta = fn t_formT :: (Type * Type) => {
adamc@421:                  Nam : string,
adamc@421:                  Show : t_formT.1 -> xbody,
adamc@421:                  Widget : nm :: Name -> xml form [] [nm = t_formT.2],
adamc@421:                  WidgetPopulated : nm :: Name -> t_formT.1 -> xml form [] [nm = t_formT.2],
adamc@421:                  Parse : t_formT.2 -> t_formT.1,
adamc@421:                  Inject : sql_injectable t_formT.1
adamc@421:                  }
adamc@421: con colsMeta = fn cols :: {(Type * Type)} => $(Top.mapT2T colMeta cols)
adamc@421: 
adamc@421: fun default (t ::: Type) (sh : show t) (rd : read t) (inj : sql_injectable t)
adamc@421:             name : colMeta (t, string) =
adamc@421:     {Nam = name,
adamc@421:      Show = txt,
adamc@421:      Widget = fn nm :: Name => <xml><textbox{nm}/></xml>,
adamc@421:      WidgetPopulated = fn (nm :: Name) n =>
adamc@421:                           <xml><textbox{nm} value={show n}/></xml>,
adamc@421:      Parse = readError,
adamc@421:      Inject = _}
adamc@421: 
adamc@421: val int = default
adamc@421: val float = default
adamc@421: val string = default
adamc@421: 
adamc@421: fun bool name = {Nam = name,
adamc@421:                  Show = txt,
adamc@421:                  Widget = fn nm :: Name => <xml><checkbox{nm}/></xml>,
adamc@421:                  WidgetPopulated = fn (nm :: Name) b =>
adamc@421:                                       <xml><checkbox{nm} checked={b}/></xml>,
adamc@421:                  Parse = fn x => x,
adamc@421:                  Inject = _}
adamc@421: 
adamc@421: functor Make(M : sig
adamc@421:                  con cols :: {(Type * Type)}
adamc@421:                  constraint [Id] ~ cols
adamc@421:                  val tab : sql_table ([Id = int] ++ mapT2T fstTT cols)
adamc@421: 
adamc@421:                  val title : string
adamc@421: 
adamc@421:                  val cols : colsMeta cols
adamc@421:              end) = struct
adamc@421: 
adamc@421:     open constraints M
adamc@421:     val tab = M.tab
adamc@421: 
adamc@421:     sequence seq
adamc@421: 
adamc@421:     fun list () =
adamc@421:         rows <- queryX (SELECT * FROM tab AS T)
adamc@421:                        (fn (fs : {T : $([Id = int] ++ mapT2T fstTT M.cols)}) => <xml>
adamc@421:                          <tr>
adamc@421:                            <td>{[fs.T.Id]}</td>
adamc@421:                            {foldT2RX2 [fstTT] [colMeta] [tr]
adamc@421:                                       (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@421:                                                        [[nm] ~ rest] v col => <xml>
adamc@421:                                                          <td>{col.Show v}</td>
adamc@421:                                                        </xml>)
adamc@421:                                       [M.cols] (fs.T -- #Id) M.cols}
adamc@421:                            <td>
adamc@421:                              <a link={upd fs.T.Id}>[Update]</a>
adamc@421:                              <a link={confirm fs.T.Id}>[Delete]</a>
adamc@421:                            </td>
adamc@421:                          </tr>
adamc@421:                        </xml>);
adamc@421:         return <xml>
adamc@421:           <table border={1}>
adamc@421:             <tr>
adamc@421:               <th>ID</th>
adamc@421:               {foldT2RX [colMeta] [tr]
adamc@421:                         (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@421:                                          [[nm] ~ rest] col => <xml>
adamc@421:                                            <th>{cdata col.Nam}</th>
adamc@421:                                          </xml>)
adamc@421:                         [M.cols] M.cols}
adamc@421:             </tr>
adamc@421:             {rows}
adamc@421:           </table>
adamc@421: 
adamc@421:           <br/><hr/><br/>
adamc@421: 
adamc@421:           <form>
adamc@421:             {foldT2R [colMeta] [fn cols :: {(Type * Type)} => xml form [] (mapT2T sndTT cols)]
adamc@421:                      (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@421:                                       [[nm] ~ rest] (col : colMeta t) (acc : xml form [] (mapT2T sndTT rest)) => <xml>
adamc@421:                                         <li> {cdata col.Nam}: {col.Widget [nm]}</li>
adamc@421:                                         {useMore acc}
adamc@421:                                       </xml>)
adamc@421:                      <xml/>
adamc@421:                      [M.cols] M.cols}
adamc@421:             
adamc@421:             <submit action={create}/>
adamc@421:           </form>
adamc@421:         </xml>
adamc@421: 
adamc@421:     and create (inputs : $(mapT2T sndTT M.cols)) =
adamc@421:         id <- nextval seq;
adamc@421:         () <- dml (insert tab
adamc@421:                           (foldT2R2 [sndTT] [colMeta]
adamc@421:                                     [fn cols => $(mapT2T (fn t :: (Type * Type) =>
adamc@421:                                                              sql_exp [] [] [] t.1) cols)]
adamc@421:                                     (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@421:                                                      [[nm] ~ rest] =>
adamc@421:                                      fn input col acc => acc with nm = @sql_inject col.Inject (col.Parse input))
adamc@421:                                     {} [M.cols] inputs M.cols
adamc@421:                            with #Id = (SQL {id})));
adamc@421:         ls <- list ();
adamc@421:         return <xml><body>
adamc@421:           <p>Inserted with ID {[id]}.</p>
adamc@421: 
adamc@421:           {ls}
adamc@421:         </body></xml>
adamc@421: 
adamc@421:     and save (id : int) (inputs : $(mapT2T sndTT M.cols)) =
adamc@421:         () <- dml (update [mapT2T fstTT M.cols]
adamc@421:                           (foldT2R2 [sndTT] [colMeta]
adamc@421:                                     [fn cols => $(mapT2T (fn t :: (Type * Type) =>
adamc@421:                                                              sql_exp [T = [Id = int]
adamc@421:                                                                               ++ mapT2T fstTT M.cols]
adamc@421:                                                                      [] [] t.1) cols)]
adamc@421:                                     (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@421:                                                      [[nm] ~ rest] =>
adamc@421:                                      fn input col acc => acc with nm =
adamc@421:                                                                   @sql_inject col.Inject (col.Parse input))
adamc@421:                                     {} [M.cols] inputs M.cols)
adamc@421:                           tab (WHERE T.Id = {id}));
adamc@421:         ls <- list ();
adamc@421:         return <xml><body>
adamc@421:           <p>Saved!</p>
adamc@421: 
adamc@421:           {ls}
adamc@421:         </body></xml>
adamc@421: 
adamc@421:     and upd (id : int) =
adamc@421:         fso <- oneOrNoRows (SELECT tab.{{mapT2T fstTT M.cols}} FROM tab WHERE tab.Id = {id});
adamc@421:         case fso : (Basis.option {Tab : $(mapT2T fstTT M.cols)}) of
adamc@421:             None => return <xml><body>Not found!</body></xml>
adamc@421:           | Some fs => return <xml><body><form>
adamc@421:             {foldT2R2 [fstTT] [colMeta] [fn cols :: {(Type * Type)} => xml form [] (mapT2T sndTT cols)]
adamc@421:                       (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@421:                                        [[nm] ~ rest] (v : t.1) (col : colMeta t)
adamc@421:                                        (acc : xml form [] (mapT2T sndTT rest)) =>
adamc@421:                           <xml>
adamc@421:                             <li> {cdata col.Nam}: {col.WidgetPopulated [nm] v}</li>
adamc@421:                             {useMore acc}
adamc@421:                           </xml>)
adamc@421:                       <xml/>
adamc@421:                       [M.cols] fs.Tab M.cols}
adamc@421: 
adamc@421:             <submit action={save id}/>
adamc@421:           </form></body></xml>
adamc@421: 
adamc@421:     and delete (id : int) =
adamc@421:         () <- dml (DELETE FROM tab WHERE Id = {id});
adamc@421:         ls <- list ();
adamc@421:         return <xml><body>
adamc@421:           <p>The deed is done.</p>
adamc@421: 
adamc@421:           {ls}
adamc@421:         </body></xml>
adamc@421: 
adamc@421:     and confirm (id : int) = return <xml><body>
adamc@421:       <p>Are you sure you want to delete ID #{[id]}?</p>
adamc@421: 
adamc@421:       <p><a link={delete id}>I was born sure!</a></p>
adamc@421:     </body></xml>
adamc@421: 
adamc@421:     and main () =
adamc@421:         ls <- list ();
adamc@421:         return <xml><head>
adamc@421:           <title>{cdata M.title}</title>
adamc@421:         </head><body>
adamc@421: 
adamc@421:           <h1>{cdata M.title}</h1>
adamc@421: 
adamc@421:           {ls}
adamc@421:         </body></xml>
adamc@421: 
adamc@421: end