util/dataforms.lua

   1 local setmetatable = setmetatable;
   2 local pairs, ipairs = pairs, ipairs;
   3 local tostring, type = tostring, type;
   4 local t_concat = table.concat;
   5
   6 local st = require "util.stanza";
   7
   8 module "dataforms"
   9
  10 local xmlns_forms = 'jabber:x:data';
  11
  12 local form_t = {};
  13 local form_mt = { __index = form_t };
  14
  15 function new(layout)
  16         return setmetatable(layout, form_mt);
  17 end
  18
  19 local form_x_attr = { xmlns = xmlns_forms };
  20
  21 function form_t.form(layout, data)
  22         local form = st.stanza("x", form_x_attr);
  23         if layout.title then
  24                 form:tag("title"):text(layout.title):up();
  25         end
  26         if layout.instructions then
  27                 form:tag("instructions"):text(layout.instructions):up();
  28         end
  29         for n, field in ipairs(layout) do
  30                 local field_type = field.type or "text-single";
  31                 -- Add field tag
  32                 form:tag("field", { type = field_type, var = field.name, label = field.label });
  33
  34                 local value = data[field.name];
  35
  36                 -- Add value, depending on type
  37                 if field_type == "hidden" then
  38                         if type(value) == "table" then
  39                                 -- Assume an XML snippet
  40                                 form:tag("value")
  41                                         :add_child(value)
  42                                         :up();
  43                         elseif value then
  44                                 form:tag("value"):text(tostring(value)):up();
  45                         end
  46                 elseif field_type == "boolean" then
  47                         form:tag("value"):text((value and "1") or "0"):up();
  48                 elseif field_type == "fixed" then
  49
  50                 elseif field_type == "jid-multi" then
  51                         for _, jid in ipairs(value) do
  52                                 form:tag("value"):text(jid):up();
  53                         end
  54                 elseif field_type == "jid-single" then
  55                         form:tag("value"):text(value):up();
  56                 elseif field_type == "text-single" or field_type == "text-private" then
  57                         form:tag("value"):text(value):up();
  58                 elseif field_type == "text-multi" then
  59                         -- Split into multiple <value> tags, one for each line
  60                         for line in value:gmatch("([^\r\n]+)\r?\n*") do
  61                                 form:tag("value"):text(line):up();
  62                         end
  63                 end
  64
  65                 if field.required then
  66                         form:tag("required"):up();
  67                 end
  68
  69                 -- Jump back up to list of fields
  70                 form:up();
  71         end
  72         return form;
  73 end
  74
  75 function form_t.data(layout, stanza)
  76
  77 end
  78
  79 return _M;
  80
  81
  82 --[=[
  83
  84 Layout:
  85 {
  86
  87         title = "MUC Configuration",
  88         instructions = [[Use this form to configure options for this MUC room.]],
  89
  90         { name = "FORM_TYPE", type = "hidden", required = true };
  91         { name = "field-name", type = "field-type", required = false };
  92 }
  93
  94
  95 --]=]