static bool RenderVariable(Writer *out,
const char *content, size_t content_len,
bool escaped,
Seq *hash_stack)
{
JsonElement *var = NULL;
if (strncmp(content, ".", content_len) == 0)
{
var = SeqAt(hash_stack, SeqLength(hash_stack) - 1);
}
else
{
var = LookupVariable(hash_stack, content, content_len);
}
if (!var)
{
return true;
}
switch (JsonGetElementType(var))
{
case JSON_ELEMENT_TYPE_PRIMITIVE:
return RenderVariablePrimitive(out, var, escaped);
case JSON_ELEMENT_TYPE_CONTAINER:
assert(false);
return false;
}
assert(false);
return false;
}
static bool RenderVariable(Buffer *out,
const char *content, size_t content_len,
TagType conversion,
Seq *hash_stack)
{
JsonElement *var = NULL;
bool escape = conversion == TAG_TYPE_VAR;
bool serialize = conversion == TAG_TYPE_VAR_SERIALIZED;
bool serialize_compact = conversion == TAG_TYPE_VAR_SERIALIZED_COMPACT;
const bool item_mode = strncmp(content, ".", content_len) == 0;
const bool key_mode = strncmp(content, "@", content_len) == 0;
if (item_mode || key_mode)
{
var = SeqAt(hash_stack, SeqLength(hash_stack) - 1);
}
else
{
var = LookupVariable(hash_stack, content, content_len);
}
if (!var)
{
return true;
}
switch (JsonGetElementType(var))
{
case JSON_ELEMENT_TYPE_PRIMITIVE:
// note that this also covers 'serialize' on primitives
return RenderVariablePrimitive(out, var, escape, key_mode);
case JSON_ELEMENT_TYPE_CONTAINER:
if (serialize || serialize_compact)
{
return RenderVariableContainer(out, var, serialize_compact);
}
else
{
assert(false);
return false;
}
}
assert(false);
return false;
}
static bool Render(Buffer *out, const char *start, const char *input, Seq *hash_stack,
char *delim_start, size_t *delim_start_len,
char *delim_end, size_t *delim_end_len,
bool skip_content,
const char *section,
const char **section_end)
{
while (true)
{
if (!input)
{
Log(LOG_LEVEL_ERR, "Unexpected end to Mustache template");
return false;
}
Mustache tag = NextTag(input, delim_start, *delim_start_len, delim_end, *delim_end_len);
{
const char *line_begin = NULL;
const char *line_end = NULL;
if (!IsTagTypeRenderable(tag.type) && IsTagStandalone(start, tag.begin, tag.end, &line_begin, &line_end))
{
RenderContent(out, input, line_begin - input, false, skip_content);
input = line_end;
}
else
{
RenderContent(out, input, tag.begin - input, false, skip_content);
input = tag.end;
}
}
switch (tag.type)
{
case TAG_TYPE_ERR:
return false;
case TAG_TYPE_DELIM:
if (!SetDelimiters(tag.content, tag.content_len,
delim_start, delim_start_len,
delim_end, delim_end_len))
{
return false;
}
continue;
case TAG_TYPE_COMMENT:
continue;
case TAG_TYPE_NONE:
return true;
case TAG_TYPE_VAR_SERIALIZED:
case TAG_TYPE_VAR_SERIALIZED_COMPACT:
case TAG_TYPE_VAR_UNESCAPED:
case TAG_TYPE_VAR:
if (!skip_content)
{
if (tag.content_len > 0)
{
if (!RenderVariable(out, tag.content, tag.content_len, tag.type, hash_stack))
{
return false;
}
}
else
{
RenderContent(out, delim_start, *delim_start_len, false, false);
RenderContent(out, delim_end, *delim_end_len, false, false);
}
}
continue;
case TAG_TYPE_INVERTED:
case TAG_TYPE_SECTION:
{
char *section = xstrndup(tag.content, tag.content_len);
JsonElement *var = LookupVariable(hash_stack, tag.content, tag.content_len);
SeqAppend(hash_stack, var);
if (!var)
{
const char *cur_section_end = NULL;
if (!Render(out, start, input, hash_stack, delim_start, delim_start_len, delim_end, delim_end_len,
skip_content || tag.type != TAG_TYPE_INVERTED, section, &cur_section_end))
{
free(section);
return false;
}
free(section);
input = cur_section_end;
continue;
}
switch (JsonGetElementType(var))
{
case JSON_ELEMENT_TYPE_PRIMITIVE:
switch (JsonGetPrimitiveType(var))
{
case JSON_PRIMITIVE_TYPE_BOOL:
{
bool skip = skip_content || (!JsonPrimitiveGetAsBool(var) ^ (tag.type == TAG_TYPE_INVERTED));
const char *cur_section_end = NULL;
if (!Render(out, start, input, hash_stack, delim_start, delim_start_len, delim_end, delim_end_len,
skip, section, &cur_section_end))
{
free(section);
return false;
}
free(section);
input = cur_section_end;
}
continue;
default:
Log(LOG_LEVEL_WARNING, "Mustache sections can only take a boolean or a container (array or map) value, but section '%s' isn't getting one of those.",
section);
return false;
}
break;
case JSON_ELEMENT_TYPE_CONTAINER:
switch (JsonGetContainerType(var))
{
case JSON_CONTAINER_TYPE_OBJECT:
case JSON_CONTAINER_TYPE_ARRAY:
if (JsonLength(var) > 0)
{
const char *cur_section_end = NULL;
for (size_t i = 0; i < JsonLength(var); i++)
{
JsonElement *child_hash = JsonAt(var, i);
SeqAppend(hash_stack, child_hash);
if (!Render(out, start, input,
hash_stack,
delim_start, delim_start_len, delim_end, delim_end_len,
skip_content || tag.type == TAG_TYPE_INVERTED, section, &cur_section_end))
{
free(section);
return false;
}
}
input = cur_section_end;
free(section);
}
else
{
const char *cur_section_end = NULL;
if (!Render(out, start, input, hash_stack, delim_start, delim_start_len, delim_end, delim_end_len,
tag.type != TAG_TYPE_INVERTED, section, &cur_section_end))
{
free(section);
return false;
}
free(section);
input = cur_section_end;
}
break;
}
break;
}
}
continue;
case TAG_TYPE_SECTION_END:
if (!section)
{
char *varname = xstrndup(tag.content, tag.content_len);
Log(LOG_LEVEL_WARNING, "Unknown section close in mustache template '%s'", varname);
free(varname);
return false;
}
else
{
SeqRemove(hash_stack, SeqLength(hash_stack) - 1);
*section_end = input;
return true;
}
break;
default:
assert(false);
return false;
}
}
assert(false);
}
bool cGenreParseInfo::DoVarSubstitution( TSTRING &rval ) //throw( eParserHelper )
{
cDebug d("cConfigFile::DoVarSubst()");
d.TraceDebug("ORIG: %s\n", rval.c_str());
// walk through string
// look for $(
// find matching )
// pick out subset
// look up in symbol table
// substitute subset
// continue iterating
// step through string
// iterate to (slen-1), because we are looking for a two-character sentinel "$("
bool fEscaping = false;
for (TSTRING::size_type i = 0; i < rval.size(); i++)
{
TCHAR c = rval[i];
// is it the "$(" sentinel? (an escaped '$' is not a variable)
if (c == '$' && ! fEscaping )
{
c = rval[i+1];
if (c == '(')
{
// ooh, wow! it's a variable! find the end
bool found = false;
TSTRING::size_type j;
for (j = i+1; j < rval.size(); j++)
{
if (rval[j] == ')')
{
found = true;
break;
}
}
// did we find it?
if (!found)
{
// TODO: throw error
return false;
}
// otherwise, cut out the variable name
TSTRING::size_type begin = i + 2;
TSTRING::size_type size = j - i - 2;
TSTRING varname;
varname = rval.substr(begin, size);
d.TraceDebug("symbol = %s\n", varname.c_str());
// look up in symbol table
TSTRING varvalue;
if ( ! LookupVariable( varname, varvalue ) )
throw eParserUseUndefVar( varname );
// replace varname with varvalue
rval.replace(begin-2, size+3, varvalue);
d.TraceDebug("POST: %s\n", rval.c_str());
// no no no
// we should exit function, and get called again
// update counters
// we should bump the cursor over by the length of the
// varvalue (minus one, to compensate for post-increment of index)
i += varvalue.size() - 1;
goto nextchar;
}
}
else if (c == '\\')
{
fEscaping = ! fEscaping;
}
else
{
fEscaping = false;
}
nextchar:
;
}
d.TraceDebug("DONE: %s\n", rval.c_str());
// switch around
return true;
}