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@622: con colsMeta = fn cols :: {(Type * Type)} => $(map 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@632:                  val fl : folder cols
adamc@632: 
adamc@637:                  val tab : sql_table ([Id = int] ++ map fst 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@637:                        (fn (fs : {T : $([Id = int] ++ map fst M.cols)}) => <xml>
adamc@421:                          <tr>
adamc@421:                            <td>{[fs.T.Id]}</td>
adamc@637:                            {foldRX2 [fst] [colMeta] [tr]
adamc@632:                                     (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@632:                                                      [[nm] ~ rest] v col => <xml>
adamc@632:                                                        <td>{col.Show v}</td>
adamc@632:                                                      </xml>)
adamc@632:                                     [M.cols] M.fl (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@632:               {foldRX [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@632:                         [M.cols] M.fl M.cols}
adamc@421:             </tr>
adamc@421:             {rows}
adamc@421:           </table>
adamc@421: 
adamc@421:           <br/><hr/><br/>
adamc@421: 
adamc@421:           <form>
adamc@637:             {foldR [colMeta] [fn cols :: {(Type * Type)} => xml form [] (map snd cols)]
adamc@632:                    (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@637:                                     [[nm] ~ rest] (col : colMeta t) (acc : xml form [] (map snd rest)) => <xml>
adamc@632:                                       <li> {cdata col.Nam}: {col.Widget [nm]}</li>
adamc@632:                                       {useMore acc}
adamc@632:                                     </xml>)
adamc@421:                      <xml/>
adamc@632:                      [M.cols] M.fl M.cols}
adamc@421:             
adamc@421:             <submit action={create}/>
adamc@421:           </form>
adamc@421:         </xml>
adamc@421: 
adamc@637:     and create (inputs : $(map snd M.cols)) =
adamc@421:         id <- nextval seq;
adamc@434:         dml (insert tab
adamc@637:                     (foldR2 [snd] [colMeta]
adamc@632:                             [fn cols => $(map (fn t :: (Type * Type) =>
adamc@632:                                                   sql_exp [] [] [] t.1) cols)]
adamc@632:                             (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@632:                                              [[nm] ~ rest] =>
adamc@632:                              fn input col acc => acc ++ {nm = @sql_inject col.Inject (col.Parse input)})
adamc@632:                             {} [M.cols] M.fl inputs M.cols
adamc@471:                      ++ {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@499:     and upd (id : int) =
adamc@499:         let
adamc@637:             fun save (inputs : $(map snd M.cols)) =
adamc@637:                 dml (update [map fst M.cols] !
adamc@637:                             (foldR2 [snd] [colMeta]
adamc@632:                                     [fn cols => $(map (fn t :: (Type * Type) =>
adamc@632:                                                           sql_exp [T = [Id = int]
adamc@637:                                                                            ++ map fst M.cols]
adamc@632:                                                                   [] [] t.1) cols)]
adamc@632:                                     (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@632:                                                      [[nm] ~ rest] =>
adamc@632:                                      fn input col acc => acc ++ {nm =
adamc@632:                                                                  @sql_inject col.Inject (col.Parse input)})
adamc@632:                                     {} [M.cols] M.fl inputs M.cols)
adamc@499:                             tab (WHERE T.Id = {[id]}));
adamc@499:                 ls <- list ();
adamc@499:                 return <xml><body>
adamc@499:                   <p>Saved!</p>
adamc@421: 
adamc@499:                   {ls}
adamc@499:                 </body></xml>
adamc@499:         in
adamc@637:             fso <- oneOrNoRows (SELECT tab.{{map fst M.cols}} FROM tab WHERE tab.Id = {[id]});
adamc@637:             case fso : (Basis.option {Tab : $(map fst M.cols)}) of
adamc@499:                 None => return <xml><body>Not found!</body></xml>
adamc@499:               | Some fs => return <xml><body><form>
adamc@637:                 {foldR2 [fst] [colMeta] [fn cols :: {(Type * Type)} => xml form [] (map snd cols)]
adamc@632:                         (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@632:                                          [[nm] ~ rest] (v : t.1) (col : colMeta t)
adamc@637:                                          (acc : xml form [] (map snd rest)) =>
adamc@632:                             <xml>
adamc@632:                               <li> {cdata col.Nam}: {col.WidgetPopulated [nm] v}</li>
adamc@632:                               {useMore acc}
adamc@632:                             </xml>)
adamc@632:                         <xml/>
adamc@632:                         [M.cols] M.fl fs.Tab M.cols}
adamc@421: 
adamc@499:                 <submit action={save}/>
adamc@499:               </form></body></xml>
adamc@499:         end
adamc@421: 
adamc@499:     and confirm (id : int) =
adamc@499:         let
adamc@499:             fun delete () =
adamc@499:                 dml (DELETE FROM tab WHERE Id = {[id]});
adamc@499:                 ls <- list ();
adamc@499:                 return <xml><body>
adamc@499:                   <p>The deed is done.</p>
adamc@499:                   
adamc@499:                   {ls}
adamc@499:                 </body></xml>
adamc@499:         in
adamc@499:             return <xml><body>
adamc@499:               <p>Are you sure you want to delete ID #{[id]}?</p>
adamc@499:               
adamc@499:               <p><a link={delete ()}>I was born sure!</a></p>
adamc@499:             </body></xml>
adamc@499:         end    
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