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return render functions to self-contained

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This commit is contained in:
Sky Johnson 2025-05-22 07:29:13 -05:00
parent bf1d05fc3c
commit 6aed56bef4
1 changed files with 42 additions and 32 deletions
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74
runner/lua/sandbox.lua
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@ -421,31 +421,13 @@ local csrf = {
-- TEMPLATE RENDER FUNCTIONS
-- ======================================================================
-- Shared utilities
local __template_util = {
escape_html = function(s)
local entities = {['&']='&amp;', ['<']='&lt;', ['>']='&gt;', ['"']='&quot;', ["'"]='&#039;'}
return (s:gsub([=[["><'&]]=], entities))
end,
build_output = function(chunks)
return table.concat(chunks)
end,
add_text = function(output, text)
if text and #text > 0 then
table.insert(output, text)
end
end,
add_value = function(output, value, escaped)
local str = tostring(value or "")
table.insert(output, escaped and __template_util.escape_html(str) or str)
end
}
-- Template processing with code execution
_G.render = function(template_str, env)
local function escape_html(s)
local entities = {['&']='&amp;', ['<']='&lt;', ['>']='&gt;', ['"']='&quot;', ["'"]='&#039;'}
return (s:gsub([=[["><'&]]=], entities))
end
local function get_line(s, ln)
for line in s:gmatch("([^\n]*)\n?") do
if ln == 1 then return line end
@ -534,7 +516,7 @@ _G.render = function(template_str, env)
setfenv(fn, runtime_env)
local output_buffer = {}
fn(tostring, __template_util.escape_html, output_buffer, 0)
fn(tostring, escape_html, output_buffer, 0)
return table.concat(output_buffer)
end
@ -553,16 +535,30 @@ _G.parse = function(template_str, env)
elseif unescaped_start then
next_pos, placeholder_end, name, escaped = unescaped_start, unescaped_end, unescaped_name, false
else
__template_util.add_text(output, template_str:sub(pos))
local text = template_str:sub(pos)
if text and #text > 0 then
table.insert(output, text)
end
break
end
__template_util.add_text(output, template_str:sub(pos, next_pos - 1))
__template_util.add_value(output, env[name], escaped)
local text = template_str:sub(pos, next_pos - 1)
if text and #text > 0 then
table.insert(output, text)
end
local value = env[name]
local str = tostring(value or "")
if escaped then
local entities = {['&']='&amp;', ['<']='&lt;', ['>']='&gt;', ['"']='&quot;', ["'"]='&#039;'}
str = str:gsub([=[["><'&]]=], entities)
end
table.insert(output, str)
pos = placeholder_end + 1
end
return __template_util.build_output(output)
return table.concat(output)
end
-- Indexed placeholder processing
@ -580,17 +576,31 @@ _G.iparse = function(template_str, values)
elseif unescaped_start then
next_pos, placeholder_end, escaped = unescaped_start, unescaped_end, false
else
__template_util.add_text(output, template_str:sub(pos))
local text = template_str:sub(pos)
if text and #text > 0 then
table.insert(output, text)
end
break
end
__template_util.add_text(output, template_str:sub(pos, next_pos - 1))
__template_util.add_value(output, values[value_index], escaped)
local text = template_str:sub(pos, next_pos - 1)
if text and #text > 0 then
table.insert(output, text)
end
local value = values[value_index]
local str = tostring(value or "")
if escaped then
local entities = {['&']='&amp;', ['<']='&lt;', ['>']='&gt;', ['"']='&quot;', ["'"]='&#039;'}
str = str:gsub([=[["><'&]]=], entities)
end
table.insert(output, str)
pos = placeholder_end + 1
value_index = value_index + 1
end
return __template_util.build_output(output)
return table.concat(output)
end
-- ======================================================================