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#include "opml.h"
#include <algorithm>
#include <cinttypes>
#include <cstring>
#include <sstream>
#include "logger.h"
#include "rssfeed.h"
namespace newsboat {
xmlDocPtr opml::generate(const FeedContainer& feedcontainer, bool version2)
{
xmlDocPtr root = xmlNewDoc((const xmlChar*)"1.0");
xmlNodePtr opml_node =
xmlNewDocNode(root, nullptr, (const xmlChar*)"opml", nullptr);
xmlSetProp(opml_node,
(const xmlChar*)"version",
(const xmlChar*)(version2 ? "2.0" : "1.0"));
xmlDocSetRootElement(root, opml_node);
xmlNodePtr head = xmlNewTextChild(
opml_node, nullptr, (const xmlChar*)"head", nullptr);
xmlNewTextChild(head,
nullptr,
(const xmlChar*)"title",
(const xmlChar*)PROGRAM_NAME " - Exported Feeds");
xmlNodePtr body = xmlNewTextChild(
opml_node, nullptr, (const xmlChar*)"body", nullptr);
for (const auto& feed : feedcontainer.get_all_feeds()) {
if (!utils::is_special_url(feed->rssurl())) {
std::string rssurl = feed->rssurl();
std::string link = feed->link();
std::string title = feed->title();
xmlNodePtr outline = xmlNewTextChild(body,
nullptr,
(const xmlChar*)"outline",
nullptr);
xmlSetProp(outline,
(const xmlChar*)"type",
(const xmlChar*)"rss");
xmlSetProp(outline,
(const xmlChar*)"xmlUrl",
(const xmlChar*)rssurl.c_str());
xmlSetProp(outline,
(const xmlChar*)"htmlUrl",
(const xmlChar*)link.c_str());
xmlSetProp(outline,
(const xmlChar*)"title",
(const xmlChar*)title.c_str());
xmlSetProp(outline,
(const xmlChar*)"text",
(const xmlChar*)title.c_str());
if (version2) {
// OPML 2.0 supports including tags
std::vector<std::string> tags = feed->get_tags();
std::string opml_tags;
bool first_tag = true;
for (auto t : tags) {
utils::trim(t);
t = utils::replace_all(t, ",", "_");
if (first_tag) {
first_tag = false;
} else {
opml_tags.append(",");
}
opml_tags.append(t);
}
xmlSetProp(outline,
(const xmlChar*)"category",
(const xmlChar*)opml_tags.c_str());
}
}
}
return root;
}
void rec_find_rss_outlines(
FileUrlReader& urlcfg,
xmlNode* node,
std::string tag)
{
while (node) {
std::string newtag = tag;
if (strcmp((const char*)node->name, "outline") == 0) {
char* url_p = (char*)xmlGetProp(
node, (const xmlChar*)"xmlUrl");
if (!url_p) {
url_p = (char*)xmlGetProp(
node, (const xmlChar*)"url");
}
if (url_p) {
const std::string url(url_p);
xmlFree(url_p);
LOG(Level::DEBUG,
"opml::import: found RSS outline with "
"url = "
"%s",
url);
std::string nurl = std::string(url);
// Liferea uses a pipe to signal feeds read from
// the output of a program in its OPMLs. Convert
// them to our syntax.
if (url.length() >= 1 && url[0] == '|') {
nurl = strprintf::fmt(
"exec:%s", url.substr(1));
LOG(Level::DEBUG,
"opml::import: liferea-style "
"url %s converted to %s",
url,
nurl);
}
// Handle OPML filters.
char* filtercmd = (char*)xmlGetProp(
node, (const xmlChar*)"filtercmd");
if (filtercmd) {
LOG(Level::DEBUG,
"opml::import: adding filter "
"command %s to url %s",
filtercmd,
nurl);
nurl.insert(0,
strprintf::fmt("filter:%s:",
filtercmd));
xmlFree(filtercmd);
}
// Filters and scripts may have arguments, so,
// quote them when needed.
const std::string quoted_url = utils::quote_if_necessary(nurl);
LOG(Level::DEBUG,
"opml::import: size = %" PRIu64,
static_cast<uint64_t>(urlcfg.get_urls().size()));
auto& urls = urlcfg.get_urls();
if (std::find(urls.begin(), urls.end(), quoted_url) == urls.end()) {
LOG(Level::DEBUG, "opml::import: added url = %s", quoted_url);
urls.push_back(quoted_url);
if (tag.length() > 0) {
LOG(Level::DEBUG,
"opml::import: appending tag %s to url %s",
tag,
quoted_url);
urlcfg.get_tags(quoted_url).push_back(tag);
}
} else {
LOG(Level::DEBUG,
"opml::import: url = %s is already in list",
quoted_url);
}
// Add tags
std::string token;
std::istringstream ss;
char* category = (char*)xmlGetProp(node, (const xmlChar*)"category");
if (category) {
ss = std::istringstream(category);
}
auto& urltags = urlcfg.get_tags(quoted_url);
while (std::getline(ss, token, ',')) {
if (std::find(urltags.begin(), urltags.end(), token) == urltags.end()) {
urltags.push_back(token);
}
}
xmlFree(category);
} else {
char* text = (char*)xmlGetProp(
node, (const xmlChar*)"text");
if (!text) {
text = (char*)xmlGetProp(
node, (const xmlChar*)"title");
}
if (text) {
if (newtag.length() > 0) {
newtag.append("/");
}
newtag.append(text);
xmlFree(text);
}
}
}
rec_find_rss_outlines(urlcfg, node->children, newtag);
node = node->next;
}
}
nonstd::optional<std::string> opml::import(
const Filepath& filename,
FileUrlReader& urlcfg)
{
xmlDoc* doc = xmlReadFile(filename.to_locale_string().c_str(), nullptr, 0);
if (doc == nullptr) {
return strprintf::fmt(_("Error: failed to parse OPML file \"%s\""), filename);
}
nonstd::optional<std::string> error_message;
xmlNode* root = xmlDocGetRootElement(doc);
for (xmlNode* node = root->children; node != nullptr;
node = node->next) {
if (strcmp((const char*)node->name, "body") == 0) {
LOG(Level::DEBUG, "opml::import: found body");
rec_find_rss_outlines(urlcfg, node->children, "");
error_message = urlcfg.write_config();
if (error_message.has_value()) {
break;
}
}
}
xmlFreeDoc(doc);
return error_message;
}
} // namespace newsboat
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