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class-editor.dylan
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module: web-framework
author: Hannes Mehnert <[email protected]>
define open generic respond-to-get
(page, request :: <request>, response :: <response>, #key errors);
define open generic respond-to-post
(page, request :: <request>, response :: <response>);
define method check (object :: <object>, #key test-result = 0)
=> (res :: <boolean>)
#t;
end;
define method edit-form (object :: <object>, #key refer, xml) => (res)
with-xml()
form(action => "/edit", \method => "post")
{ div(class => "edit")
{ do(for (slot in data-slots(object.object-class))
let object = slot.slot-getter-method(object);
collect(with-xml() text(concatenate(slot.slot-name, ": ")) end);
//XXX check if slot is initialized?
collect(edit-slot(object, slot.slot-name));
collect(with-xml() br end);
end;
for (slot in reference-slots(object.object-class))
collect(with-xml() text(concatenate(slot.slot-name, ": ")) end);
//get slot, generate select, option field for each element
//of global list of elements...
collect(with-xml()
\select(name => slot.slot-name)
{ do(let chosen = slot.slot-getter-method(object);
let sel = #f;
for (ele in storage(slot.slot-type))
if (visible?(ele))
if (ele = chosen)
sel := #t;
collect(with-xml()
option(as(<string>, ele),
value => get-reference(ele),
selected => "selected")
end);
else
collect(with-xml()
option(as(<string>, ele),
value => get-reference(ele))
end)
end;
end if;
end;
unless(sel)
collect(with-xml()
option(as(<string>, chosen),
value => get-reference(chosen),
selected => "selected")
end);
end)
}
end);
collect(with-xml() br end);
end),
input(type => "hidden",
name => "parent-object",
value => get-reference(object)),
input(type => "hidden",
name => "action",
value => "save-object"),
input(type => "hidden",
name => "refer-to",
value => if (refer)
refer
else
get-url-from-type(object.object-class)
end),
do(if(xml) xml end),
input(type => "submit",
name => "save-button",
value => "Save")
}
}
end;
end;
//simple case for lists of strings....
define method add-form (type == <string>,
name :: <string>,
parent :: <object>,
#key fill-from-request,
refer,
xml) => (foo)
with-xml()
form(action => "/edit", \method => "post")
{ div(class => "edit")
{
input(type => "text",
name => "string"),
input(type => "hidden",
name => "parent-object",
value => get-reference(parent)),
input(type => "hidden",
name => "object-type",
value => get-reference(type)),
input(type => "hidden",
name => "action",
value => "add-object"),
do(if(xml) xml end),
do(if(refer)
with-xml()
input(type => "hidden",
name => "refer-to",
value => refer)
end
end),
input(type => "submit",
name => "add-button",
value => concatenate("Add to ", name))
}
}
end;
end;
define method add-form (object-type :: subclass(<object>),
name :: false-or(<string>),
parent :: <object>,
#key fill-from-request,
refer,
xml) => (foo) // :: <list> ?
with-xml()
form(action => "/edit", \method => "post")
{ div(class => "edit")
{ do(for (slot in data-slots(object-type))
collect(with-xml() text(concatenate(slot.slot-name, ": ")) end);
//here we should have at least a seperation between integer,
//strings and lists... or should we implement all lists with
//has-many?
let value = default(slot);
let query-value = get-query-value(slot.slot-name);
if (fill-from-request & (query-value & query-value ~= ""))
value := query-value;
end;
if (slot.slot-type = <boolean>)
collect(edit-slot(value, slot.slot-name));
else
if (value)
collect(edit-slot(value, slot.slot-name));
else
collect(with-xml() input(type => "text",
name => slot.slot-name)
end);
end if;
end;
if (slot.default-help-text)
collect(with-xml()
text(concatenate(" defaults to: ", slot.default-help-text))
end);
end;
collect(with-xml() br end);
end;
for (slot in reference-slots(object-type))
collect(with-xml() text(concatenate(slot.slot-name, ": ")) end);
//get slot, generate select, option field for each element
//of global list of elements...
let value = get-object(get-query-value(slot.slot-name));
collect(with-xml()
\select(name => slot.slot-name)
{ do(let sel = #t;
for (ele in storage(slot.slot-type))
if (visible?(ele))
if (fill-from-request & (ele = value))
sel := #f;
collect(with-xml()
option(as(<string>, ele),
value => get-reference(ele),
selected => "selected")
end);
else
collect(with-xml()
option(as(<string>, ele),
value => get-reference(ele))
end);
end;
end;
end;
if (slot.default & sel)
collect(with-xml()
option(as(<string>, slot.default),
value => get-reference(slot.default),
selected => "selected")
end);
end)
}
end);
collect(with-xml() br end);
end),
input(type => "hidden",
name => "parent-object",
value => get-reference(parent)),
input(type => "hidden",
name => "object-type",
value => get-reference(object-type)),
input(type => "hidden",
name => "refer-to",
value => if (refer) refer else get-url-from-type(object-type) end),
input(type => "hidden",
name => "action",
value => "add-object"),
do(if(xml) xml end),
input(type => "submit",
name => "add-button",
value => if (name) concatenate("Add to ", name) else "Add" end)
}
}
end;
end;
define method remove-form (object :: <object>, parent :: <object>,
#key url :: <string> = "edit",
xml)
with-xml()
form(action => "/edit", \method => "post")
{ div(class => "edit")
{
input(type => "hidden",
name => "refer-to",
value => url),
input(type => "hidden",
name => "parent-object",
value => get-reference(parent)),
input(type => "hidden",
name => "remove-this",
value => get-reference(object)),
input(type => "hidden",
name => "action",
value => "remove-object"),
do(if(xml) xml end),
input(type => "submit",
name => "remove-button",
value => "Remove")
}
}
end;
end;
define method list-forms (obj :: <object>) => (res)
let res = make(<stretchy-vector>);
for (slot in list-reference-slots(obj.object-class))
let object = slot.slot-getter-method(obj);
res := add!(res, with-xml()
text(concatenate(slot.slot-name, ": "))
end);
res := add!(res, with-xml() br end);
for (ele in object)
res := add!(res, with-xml()
a(as(<string>, ele),
href => concatenate("/edit?obj=",
get-reference(ele)))
end);
res := add!(res, remove-form(ele, object));
res := add!(res, with-xml() br end);
end;
res := add!(res, add-form(slot.slot-type, slot.slot-name, object));
end;
res;
end;
define generic edit-slot (object :: <object>, slot-name :: <string>);
define method edit-slot (object :: <object>, slot-name :: <string>)
with-xml()
input(type => "text",
size => "60",
name => slot-name,
value => as(<string>, object))
end;
end;
define method edit-slot (object :: <string>, slot-name :: <string>)
with-xml()
input(type => "text",
name => slot-name,
value => object)
end;
end;
define method edit-slot (object :: <integer>, slot-name :: <string>)
with-xml()
input(type => "text",
name => slot-name,
value => integer-to-string(object))
end;
end;
define method edit-slot (object :: <boolean>, slot-name :: <string>)
if (object)
with-xml()
input(type => "checkbox",
name => slot-name,
value => slot-name,
checked => "checked")
end;
else
with-xml()
input(type => "checkbox",
name => slot-name,
value => slot-name)
end;
end;
end;
define constant *debug* = #t;
define method respond-to-post
(page == #"edit",
request :: <request>,
response :: <response>)
let errors = #();
let action = as(<symbol>, get-query-value("action"));
let object-string = get-query-value("parent-object");
let object = get-object(object-string);
let handler <web-form-warning>
= method(e :: <web-form-warning>, next-handler :: <function>)
errors := add!(errors, e);
end;
block(return)
//add, save, remove... we may not need this here...
unless (object)
signal(make(<web-error>,
error: concatenate("Unknown object: ", object-string)));
end;
select (action)
#"add-object" => add-object(object, request);
#"remove-object" => remove-object(object, request);
#"save-object" => save-object(object, request);
otherwise => signal(make(<web-error>,
error: concatenate("Unknown action: ",
as(<string>, action))));
end select;
dump-data(); //yes, this is a bit ugly :(
exception (e :: <web-error>)
errors := add!(errors, e);
if (*debug*)
break()
end;
return();
exception (e :: <error>)
errors := add!(errors, make(<web-error>,
error: format-to-string("%=", e)));
if (*debug*)
break()
end;
return();
end;
let referer = get-query-value("refer-to");
let elements = split(referer, '-');
block(return)
unless ((elements.size = 2) & elements[1] = "detail")
if ((action = #"add-object")
& (any?(rcurry(instance?, <web-error>), errors)))
respond-to-get(#"add", request, response, errors: errors);
return();
end;
end;
referer := if (referer)
as(<symbol>, referer);
else
#"edit";
end;
respond-to-get(referer, request, response, errors: if (errors.size > 0) errors else #f end);
end;
end;
define method add-object (parent-object :: <object>, request :: <request>)
//look what type of object needs to be generated
let object-type = get-object(get-query-value("object-type"));
//XXX: hmm, make should probably only be done when all slots
//are successfully parsed and then use init-keywords...
//let object = make(object-type);
if (object-type = <string>)
let value = get-query-value("string");
parent-object := add!(parent-object, value);
else
let init = make(<stretchy-vector>);
//more complex objects:
//data-slots ref-slots needs to be read and sanity checked
let deferred-slot-setter = make(<stretchy-vector>);
for (slot in data-slots(object-type))
let value = parse(slot.slot-name, slot.slot-type);
//then set slots of object
if ((slot.slot-type = <boolean>) | value)
add!(init, as(<symbol>, slot.slot-name));
add!(init, value);
else
add!(deferred-slot-setter, slot);
end;
//slot.slot-setter-method(value, object);
end;
for (slot in reference-slots(object-type))
let value = get-object(get-query-value(slot.slot-name));
add!(init, as(<symbol>, slot.slot-name));
add!(init, value);
//slot.slot-setter-method(value, object);
end;
let object = apply(make, object-type, as(<vector>, init));
for (slot in deferred-slot-setter)
let value = slot.default-function(object);
unless (value)
signal(make(<web-error>,
error: concatenate("Please specify ",
slot.slot-name,
" correctly!")));
end unless;
slot.slot-setter-method(value, object);
end;
unless(object.object-class = object-type)
for (slot in data-slots(object.object-class))
unless(member?(as(<symbol>, slot.slot-name), init))
let value = slot.default | slot.default-function(object);
unless (slot.slot-type = <boolean> | value)
signal(make(<web-error>,
error: concatenate("Please specify ",
slot.slot-name,
" correctly!")));
end unless;
slot.slot-setter-method(value, object);
end;
end;
end;
let command = make(<add-command>,
arguments: list(object, parent-object));
redo(command);
let change = make(<change>,
command: command);
save(change);
signal(make(<web-success>,
warning: concatenate("Added ",
get-url-from-type(object-type),
": ", show(object))));
end;
end;
define method remove-object (parent-object :: <object>, request :: <request>)
//read object value, get it from $obj-table
let object = get-object(get-query-value("remove-this"));
//sanity type-check
let command = make(<remove-command>,
arguments: list(object, parent-object));
let change = make(<change>,
command: command);
save(change);
redo(command);
signal(make(<web-success>,
warning: concatenate("Removed ",
get-url-from-type(object.object-class),
": ", show(object))));
end;
define method parse (name, type)
let value = get-query-value(name);
if (type = <boolean>)
if (value = name)
#t;
else
#f;
end;
else
if (value & (value ~= ""))
if (type = <string>)
value;
elseif (type = <integer>)
string-to-integer(value)
else
as(type, value);
end;
else
#f;
end;
end;
end;
define method save-object (object :: <object>, request :: <request>)
//data-slots and ref-slots may have changed...
let slots = #();
for (slot in data-slots(object.object-class))
//maybe use another generic function, not as in parse?
let value = parse(slot.slot-name, slot.slot-type);
//can't check for if(value) here, because value can be #f and valid...
if (value ~= slot.slot-getter-method(object))
slots := add!(slots,
make(<triple>,
slot-name: slot.slot-name,
new-value: value,
old-value: slot.slot-getter-method(object)));
end;
end;
//now something completely different
for (slot in reference-slots(object.object-class))
//get new value via reference
let value = get-object(get-query-value(slot.slot-name));
//error check it!
let current-object = slot.slot-getter-method(object);
if (value & (value ~= current-object))
slots := add!(slots,
make(<triple>,
slot-name: slot.slot-name,
new-value: value,
old-value: slot.slot-getter-method(object)));
end;
end;
if (slots.size > 0)
let command = make(<edit-command>,
arguments: list(object, slots));
redo(command);
//check world, if broken, do a rollback!
let change = make(<change>,
command: command);
save(change);
let slot-names = apply(concatenate,
map(method(x)
concatenate(x.slot-name, " to ",
show(x.new-value), " ")
end, slots));
signal(make(<web-success>,
warning: concatenate("Saved \"",
get-url-from-type(object.object-class),
"\", ",
show(object),
" changed slots: ",
slot-names)));
end;
end;