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local setmetatable = setmetatable;
local pairs, ipairs = pairs, ipairs;
local tostring, type = tostring, type;
local t_concat = table.concat;
local st = require "util.stanza";
module "dataforms"
local xmlns_forms = 'jabber:x:data';
local form_t = {};
local form_mt = { __index = form_t };
function new(layout)
return setmetatable(layout, form_mt);
end
local form_x_attr = { xmlns = xmlns_forms };
function form_t.form(layout, data)
local form = st.stanza("x", form_x_attr);
if layout.title then
form:tag("title"):text(layout.title):up();
end
if layout.instructions then
form:tag("instructions"):text(layout.instructions):up();
end
for n, field in ipairs(layout) do
local field_type = field.type or "text-single";
-- Add field tag
form:tag("field", { type = field_type, var = field.name, label = field.label });
local value = data[field.name];
-- Add value, depending on type
if field_type == "hidden" then
if type(value) == "table" then
-- Assume an XML snippet
form:tag("value")
:add_child(value)
:up();
elseif value then
form:tag("value"):text(tostring(value)):up();
end
elseif field_type == "boolean" then
form:tag("value"):text((value and "1") or "0"):up();
elseif field_type == "fixed" then
elseif field_type == "jid-multi" then
for _, jid in ipairs(value) do
form:tag("value"):text(jid):up();
end
elseif field_type == "jid-single" then
form:tag("value"):text(value):up();
elseif field_type == "text-single" or field_type == "text-private" then
form:tag("value"):text(value):up();
elseif field_type == "text-multi" then
-- Split into multiple <value> tags, one for each line
for line in value:gmatch("([^\r\n]+)\r?\n*") do
form:tag("value"):text(line):up();
end
end
if field.required then
form:tag("required"):up();
end
-- Jump back up to list of fields
form:up();
end
return form;
end
local field_readers = {};
function form_t.data(layout, stanza)
local data = {};
for field_tag in stanza:childtags() do
local field_type = field_tag.attr.type;
local reader = field_readers[field_type];
if reader then
data[field_tag.attr.var] = reader(field_tag);
end
end
return data;
end
field_readers["text-single"] =
function (field_tag)
local value = field_tag:child_with_name("value");
if value then
return value[1];
end
end
field_readers["text-private"] =
field_readers["text-single"];
field_readers["text-multi"] =
function (field_tag)
local result = {};
for value_tag in field_tag:childtags() do
if value_tag.name == "value" then
result[#result+1] = value_tag[1];
end
end
return t_concat(result, "\n");
end
field_readers["boolean"] =
function (field_tag)
local value = field_tag:child_with_name("value");
if value then
if value[1] == "1" or value[1] == "true" then
return true;
else
return false;
end
end
end
field_readers["hidden"] =
function (field_tag)
local value = field_tag:child_with_name("value");
if value then
return value[1];
end
end
return _M;
--[=[
Layout:
{
title = "MUC Configuration",
instructions = [[Use this form to configure options for this MUC room.]],
{ name = "FORM_TYPE", type = "hidden", required = true };
{ name = "field-name", type = "field-type", required = false };
}
--]=]
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