util/dataforms.lua

   1 local setmetatable = setmetatable;
   2 local pairs, ipairs = pairs, ipairs;
   3 local st = require "util.stanza";
   4
   5 module "dataforms"
   6
   7 local xmlns_forms = 'jabber:x:data';
   8
   9 local form_t = {};
  10 local form_mt = { __index = form_t };
  11
  12 function new(layout)
  13         return setmetatable(layout, form_mt);
  14 end
  15
  16 local form_x_attr = { xmlns = xmlns_forms };
  17
  18 function form_t.form(layout, data)
  19         local form = st.stanza("x", form_x_attr);
  20         if layout.title then
  21                 form:tag("title"):text(layout.title):up();
  22         end
  23         if layout.instructions then
  24                 form:tag("instructions"):text(layout.instructions):up();
  25         end
  26         for n, field in ipairs(layout) do
  27                 local field_type = field.type or "text-single";
  28                 -- Add field tag
  29                 form:tag("field", { type = field_type, var = field.name, label = field.label });
  30
  31                 local value = data[field.name];
  32
  33                 -- Add value, depending on type
  34                 if field_type == "hidden" then
  35                         if type(value) == "table" then
  36                                 -- Assume an XML snippet
  37                                 form:add_child(value);
  38                         elseif value then
  39                                 form:text(tostring(value));
  40                         end
  41                 elseif field_type == "boolean" then
  42                         form:tag("value"):text((value and "1") or "0");
  43                 elseif field_type == "fixed" then
  44
  45                 elseif field_type == "jid-multi" then
  46                         for _, jid in ipairs(value) do
  47                                 form:tag("value"):text(jid):up();
  48                         end
  49                 elseif field_type == "jid-single" then
  50                         form:tag("value"):text(value):up();
  51                 elseif field_type == "text-single" or field_type == "text-private" then
  52                         form:tag("value"):text(value):up();
  53                 elseif field_type == "text-multi" then
  54                         -- Split into multiple <value> tags, one for each line
  55                         for line in value:gmatch("([^\r\n]+)\r?\n*") do
  56                                 form:tag("value"):text(line):up();
  57                         end
  58                 end
  59
  60                 -- Jump back up to list of fields
  61                 form:up();
  62         end
  63         return form;
  64 end
  65
  66 function form_t.data(layout, stanza)
  67
  68 end
  69
  70 return _M;
  71
  72
  73 --[=[
  74
  75 Layout:
  76 {
  77
  78         title = "MUC Configuration",
  79         instructions = [[Use this form to configure options for this MUC room.]],
  80
  81         { name = "FORM_TYPE", type = "hidden", required = true };
  82         { name = "field-name", type = "field-type", required = false };
  83 }
  84
  85
  86 --]=]