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helper.cpp
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helper.cpp
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#include "./helper.h"
#include "./fieldmapping.h"
#include <tagparser/diagnostics.h>
#include <tagparser/id3/id3v2tag.h>
#include <tagparser/matroska/matroskatag.h>
#include <tagparser/mediafileinfo.h>
#include <tagparser/mp4/mp4tag.h>
#include <tagparser/progressfeedback.h>
#include <tagparser/vorbis/vorbiscomment.h>
#include <c++utilities/application/argumentparser.h>
#include <c++utilities/conversion/stringbuilder.h>
#include <c++utilities/io/ansiescapecodes.h>
#include <unistd.h>
#include <csignal>
#include <cstring>
#include <iostream>
using namespace std;
using namespace std::placeholders;
using namespace CppUtilities;
using namespace CppUtilities::EscapeCodes;
using namespace TagParser;
using namespace Settings;
namespace Cli {
const std::vector<std::string_view> &id3v2CoverTypeNames()
{
static const auto t
= std::vector<std::string_view>{ "other"sv, "file-icon"sv, "other-file-icon"sv, "front-cover"sv, "back-cover"sv, "leaflet-page"sv, "media"sv,
"lead-performer"sv, "artist"sv, "conductor"sv, "band"sv, "composer"sv, "lyricist"sv, "recording-location"sv, "during-recording"sv,
"during-performance"sv, "movie-screen-capture"sv, "bright-colored-fish"sv, "illustration"sv, "artist-logotype"sv, "publisher"sv };
return t;
}
CoverType id3v2CoverType(std::string_view coverName)
{
static const auto mapping = [] {
const auto &names = id3v2CoverTypeNames();
auto map = std::map<std::string_view, CoverType>();
auto index = CoverType();
for (const auto name : names) {
map[name] = index++;
}
return map;
}();
if (const auto i = mapping.find(coverName); i != mapping.end()) {
return i->second;
} else {
return invalidCoverType;
}
}
std::string_view id3v2CoverName(CoverType coverType)
{
const auto &names = id3v2CoverTypeNames();
return coverType < names.size() ? names[coverType] : "?"sv;
}
CppUtilities::TimeSpanOutputFormat timeSpanOutputFormat = TimeSpanOutputFormat::WithMeasures;
/*!
* \class InterruptHandler
* \brief The InterruptHandler class allows to register an interrupt handler within a scope.
* \remarks Only one instance of the class can exist at a time.
*/
std::function<void()> InterruptHandler::s_handler;
bool InterruptHandler::s_handlerRegistered = false;
/*!
* \brief Registers the specified \a handler for SIGINT and SIGTERM as long as this object is alive.
* \remarks The specified \a handler should only call functions which are permitted to be used in signal handlers
* (eg. use POSIX write() instread of std::cout).
* \throws Throws std::runtime_error when attempting to create a 2nd instance.
*/
InterruptHandler::InterruptHandler(std::function<void()> handler)
{
// set handler function or throw if an instance has already been created
if (s_handler) {
throw runtime_error("Only one instance of InterruptHandler can exist at a time.");
}
s_handler = handler;
// register handler if not registered yet
if (!s_handlerRegistered) {
s_handlerRegistered = true;
signal(SIGINT, &InterruptHandler::handler);
signal(SIGTERM, &InterruptHandler::handler);
}
}
/*!
* \brief Unregisters the handler.
*/
InterruptHandler::~InterruptHandler()
{
s_handler = function<void()>();
}
/*!
* \brief Internal handler method.
*/
void InterruptHandler::handler(int signum)
{
// just exit if no custom handler has been defined
if (!s_handler) {
_exit(signum);
}
// finalize log and print warning, prevent using std::cout which could lead to undefined behaviour
if (!logLineFinalized) {
logLineFinalized = true;
write(STDOUT_FILENO, "\n", 1);
}
if (EscapeCodes::enabled) {
write(STDOUT_FILENO, "\e[1;33mWarning:\e[0m \e[1mSignal received, trying to abort ongoing process ...\e[0m\n", 82);
} else {
write(STDOUT_FILENO, "Warning: Signal received, trying to abort ongoing process ...\n", 63);
}
// call custom handler
s_handler();
}
string incremented(const string &str, unsigned int toIncrement)
{
string res;
res.reserve(str.size());
unsigned int value = 0;
bool hasValue = false;
for (const char &c : str) {
if (toIncrement && c >= '0' && c <= '9') {
value = value * 10 + static_cast<unsigned int>(c - '0');
hasValue = true;
} else {
if (hasValue) {
res += numberToString(value + 1);
hasValue = false;
--toIncrement;
}
res += c;
}
}
if (hasValue) {
res += numberToString(value + 1);
}
return res;
}
void printDiagMessages(const Diagnostics &diag, const char *head, bool beVerbose)
{
if (diag.empty()) {
return;
}
if (!beVerbose) {
for (const auto &message : diag) {
switch (message.level()) {
case DiagLevel::Debug:
case DiagLevel::Information:
break;
default:
goto printDiagMsg;
}
}
return;
}
printDiagMsg:
if (head) {
cout << " - " << head << endl;
}
for (const auto &message : diag) {
switch (message.level()) {
case DiagLevel::Debug:
if (!beVerbose) {
continue;
}
cout << " Debug ";
break;
case DiagLevel::Information:
if (!beVerbose) {
continue;
}
cout << " Information ";
break;
case DiagLevel::Warning:
setStyle(cout, Color::Yellow, ColorContext::Foreground, TextAttribute::Bold);
setStyle(cout, TextAttribute::Reset);
setStyle(cout, TextAttribute::Bold);
cout << " Warning ";
setStyle(cout, TextAttribute::Reset);
break;
case DiagLevel::Critical:
setStyle(cout, Color::Red, ColorContext::Foreground, TextAttribute::Bold);
setStyle(cout, TextAttribute::Reset);
setStyle(cout, TextAttribute::Bold);
cout << " Error ";
setStyle(cout, TextAttribute::Reset);
break;
default:;
}
cout << message.creationTime().toString(DateTimeOutputFormat::TimeOnly) << " ";
cout << message.context() << ": ";
cout << message.message() << '\n';
}
}
void printProperty(const char *propName, std::string_view value, const char *suffix, Indentation indentation)
{
if (value.empty()) {
return;
}
const auto propLen(strlen(propName));
cout << indentation << propName << Indentation(static_cast<unsigned char>(propLen < 30 ? 30 - propLen : 1)) << value;
if (suffix) {
cout << ' ' << suffix;
}
cout << '\n';
}
void printProperty(const char *propName, ElementPosition elementPosition, const char *suffix, Indentation indentation)
{
const char *pos = nullptr;
switch (elementPosition) {
case ElementPosition::BeforeData:
pos = "before data";
break;
case ElementPosition::AfterData:
pos = "after data";
break;
case ElementPosition::Keep:
pos = nullptr;
}
if (pos) {
printProperty(propName, pos, suffix, indentation);
}
}
void printFieldName(std::string_view fieldName)
{
cout << " " << fieldName;
// also write padding
if (fieldName.size() >= 18) {
// write at least one space
cout << ' ';
return;
}
for (auto i = fieldName.size(); i < 18; ++i) {
cout << ' ';
}
}
void printTagValue(const TagValue &value)
{
try {
cout << value.toString(TagTextEncoding::Utf8);
} catch (const ConversionException &) {
// handle case when value can not be displayed as string
cout << "can't display as string (see --extract)";
}
cout << '\n';
}
template <class TagType> static void printId3v2CoverValues(TagType *tag)
{
const auto &fields = tag->fields();
const auto id = tag->fieldId(KnownField::Cover);
for (auto range = fields.equal_range(id); range.first != range.second; ++range.first) {
const auto &field = range.first->second;
printFieldName(argsToString("Cover (", id3v2CoverName(static_cast<CoverType>(field.typeInfo())), ")"));
printTagValue(field.value());
}
}
void printField(const FieldScope &scope, const Tag *tag, TagType tagType, bool skipEmpty)
{
const auto fieldName = std::string_view(scope.field.name());
try {
if (scope.field.knownFieldForTag(tag, tagType) == KnownField::Cover) {
if (tagType == TagType::Id3v2Tag) {
printId3v2CoverValues(static_cast<const Id3v2Tag *>(tag));
} else {
printId3v2CoverValues(static_cast<const VorbisComment *>(tag));
}
return;
}
// parse field denotation
const auto &values = scope.field.values(tag, tagType);
// skip values if format-specific field ID used which is not applicable for the current tag
if (!values.second) {
return;
}
// skip empty values (unless prevented)
if (skipEmpty && values.first.empty()) {
return;
}
// print empty value (if not prevented)
if (values.first.empty()) {
printFieldName(fieldName);
cout << "none\n";
return;
}
// print values
for (const auto &value : values.first) {
printFieldName(fieldName);
printTagValue(*value);
}
} catch (const ConversionException &e) {
// handle conversion error which might happen when parsing field denotation
printFieldName(fieldName);
cout << "unable to parse - " << e.what() << '\n';
}
}
template <typename ConcreteTag> void printNativeFields(const Tag *tag)
{
const auto *const concreteTag = static_cast<const ConcreteTag *>(tag);
for (const auto &field : concreteTag->fields()) {
// skip all fields which are supported anyways
if (concreteTag->knownField(field.first) != KnownField::Invalid) {
continue;
}
const auto fieldId(ConcreteTag::FieldType::fieldIdToString(field.first));
printFieldName(fieldId);
printTagValue(field.second.value());
}
}
void printNativeFields(const Tag *tag)
{
switch (tag->type()) {
case TagType::Id3v2Tag:
printNativeFields<Id3v2Tag>(tag);
break;
case TagType::Mp4Tag:
printNativeFields<Mp4Tag>(tag);
break;
case TagType::MatroskaTag:
printNativeFields<MatroskaTag>(tag);
break;
case TagType::VorbisComment:
case TagType::OggVorbisComment:
printNativeFields<VorbisComment>(tag);
break;
default:;
}
}
TimeSpanOutputFormat parseTimeSpanOutputFormat(const Argument &timeSpanFormatArg, TimeSpanOutputFormat defaultFormat)
{
if (timeSpanFormatArg.isPresent()) {
const auto &val = timeSpanFormatArg.values().front();
if (!strcmp(val, "measures")) {
return TimeSpanOutputFormat::WithMeasures;
} else if (!strcmp(val, "colons")) {
return TimeSpanOutputFormat::Normal;
} else if (!strcmp(val, "seconds")) {
return TimeSpanOutputFormat::TotalSeconds;
} else {
cerr << Phrases::Error << "The specified time span format \"" << val << "\" is invalid." << Phrases::End
<< "note: Valid formats are measures, colons and seconds." << endl;
exit(-1);
}
}
return defaultFormat;
}
TagUsage parseUsageDenotation(const Argument &usageArg, TagUsage defaultUsage)
{
if (usageArg.isPresent()) {
const auto &val = usageArg.values().front();
if (!strcmp(val, "never")) {
return TagUsage::Never;
} else if (!strcmp(val, "keepexisting")) {
return TagUsage::KeepExisting;
} else if (!strcmp(val, "always")) {
return TagUsage::Always;
} else {
cerr << Phrases::Error << "The specified tag usage \"" << val << "\" is invalid." << Phrases::End
<< "note: Valid values are never, keepexisting and always." << endl;
exit(-1);
}
}
return defaultUsage;
}
TagTextEncoding parseEncodingDenotation(const Argument &encodingArg, TagTextEncoding defaultEncoding)
{
if (encodingArg.isPresent()) {
const auto &val = encodingArg.values().front();
if (!strcmp(val, "utf8")) {
return TagTextEncoding::Utf8;
} else if (!strcmp(val, "latin1")) {
return TagTextEncoding::Latin1;
} else if (!strcmp(val, "utf16be")) {
return TagTextEncoding::Utf16BigEndian;
} else if (!strcmp(val, "utf16le")) {
return TagTextEncoding::Utf16LittleEndian;
} else if (!strcmp(val, "auto")) {
} else {
cerr << Phrases::Error << "The specified encoding \"" << val << "\" is invalid." << Phrases::End
<< "note: Valid encodings are utf8, latin1, utf16be, utf16le and auto." << endl;
exit(-1);
}
}
return defaultEncoding;
}
ElementPosition parsePositionDenotation(const Argument &posArg, const Argument &valueArg, ElementPosition defaultPos)
{
if (posArg.isPresent()) {
const char *val = valueArg.values(0).front();
if (!strcmp(val, "front")) {
return ElementPosition::BeforeData;
} else if (!strcmp(val, "back")) {
return ElementPosition::AfterData;
} else if (!strcmp(val, "keep")) {
return ElementPosition::Keep;
} else {
cerr << Phrases::Error << "The specified position \"" << val << "\" is invalid." << Phrases::End
<< "note: Valid positions are front, back and keep." << endl;
exit(-1);
}
}
return defaultPos;
}
std::uint64_t parseUInt64(const Argument &arg, std::uint64_t defaultValue)
{
if (arg.isPresent()) {
try {
if (*arg.values().front() == '0' && *(arg.values().front() + 1) == 'x') {
return stringToNumber<std::uint64_t>(arg.values().front() + 2, 16);
} else {
return stringToNumber<std::uint64_t>(arg.values().front());
}
} catch (const ConversionException &) {
cerr << Phrases::Error << "The specified value \"" << arg.values().front() << "\" is no valid unsigned integer." << Phrases::EndFlush;
exit(-1);
}
}
return defaultValue;
}
TagTarget::IdContainerType parseIds(const std::string &concatenatedIds)
{
auto splittedIds = splitString(concatenatedIds, ",", EmptyPartsTreat::Omit);
TagTarget::IdContainerType convertedIds;
convertedIds.reserve(splittedIds.size());
for (const auto &id : splittedIds) {
try {
convertedIds.push_back(stringToNumber<TagTarget::IdType>(id));
} catch (const ConversionException &) {
cerr << Phrases::Error << "The specified ID \"" << id << "\" is invalid." << Phrases::End << "note: IDs must be unsigned integers."
<< endl;
exit(-1);
}
}
return convertedIds;
}
bool applyTargetConfiguration(TagTarget &target, const std::string &configStr)
{
if (!configStr.empty()) {
if (configStr.compare(0, 13, "target-level=") == 0) {
try {
target.setLevel(stringToNumber<std::uint64_t>(configStr.substr(13)));
} catch (const ConversionException &) {
cerr << Phrases::Error << "The specified target level \"" << configStr.substr(13) << "\" is invalid." << Phrases::End
<< "note: The target level must be an unsigned integer." << endl;
exit(-1);
}
} else if (configStr.compare(0, 17, "target-levelname=") == 0) {
target.setLevelName(configStr.substr(17));
} else if (configStr.compare(0, 14, "target-tracks=") == 0) {
target.tracks() = parseIds(configStr.substr(14));
} else if (configStr.compare(0, 16, "target-chapters=") == 0) {
target.chapters() = parseIds(configStr.substr(16));
} else if (configStr.compare(0, 16, "target-editions=") == 0) {
target.editions() = parseIds(configStr.substr(16));
} else if (configStr.compare(0, 19, "target-attachments=") == 0) {
target.attachments() = parseIds(configStr.substr(17));
} else if (configStr.compare(0, 13, "target-reset=") == 0) {
if (*(configStr.data() + 13)) {
cerr << Phrases::Error << "Invalid assignment " << (configStr.data() + 13) << " for target-reset." << Phrases::EndFlush;
exit(-1);
}
target.clear();
} else if (configStr == "target-reset") {
target.clear();
} else {
return false;
}
return true;
} else {
return false;
}
}
FieldDenotations parseFieldDenotations(const Argument &fieldsArg, bool readOnly)
{
FieldDenotations fields;
if (!fieldsArg.isPresent()) {
return fields;
}
const vector<const char *> &fieldDenotations = fieldsArg.values();
FieldScope scope;
for (const char *fieldDenotationString : fieldDenotations) {
// check for tag or target specifier
const auto fieldDenotationLen = strlen(fieldDenotationString);
if (!strncmp(fieldDenotationString, "tag=", 4)) {
if (fieldDenotationLen == 4) {
cerr << Phrases::Error << "The \"tag\"-specifier has been used with no value(s)." << Phrases::End
<< "note: Possible values are id3,id3v1,id3v2,itunes,vorbis,matroska and all." << endl;
exit(-1);
} else {
TagType tagType = TagType::Unspecified;
for (const auto &part : splitString(fieldDenotationString + 4, ",", EmptyPartsTreat::Omit)) {
if (part == "id3v1") {
tagType |= TagType::Id3v1Tag;
} else if (part == "id3v2") {
tagType |= TagType::Id3v2Tag;
} else if (part == "id3") {
tagType |= TagType::Id3v1Tag | TagType::Id3v2Tag;
} else if (part == "itunes" || part == "mp4") {
tagType |= TagType::Mp4Tag;
} else if (part == "vorbis") {
tagType |= TagType::VorbisComment | TagType::OggVorbisComment;
} else if (part == "matroska") {
tagType |= TagType::MatroskaTag;
} else if (part == "all" || part == "any") {
tagType = TagType::Unspecified;
break;
} else {
cerr << Phrases::Error << "The value \"" << part << " for the \"tag\"-specifier is invalid." << Phrases::End
<< "note: Possible values are id3,id3v1,id3v2,itunes,vorbis,matroska and all." << endl;
exit(-1);
}
}
scope.tagType = tagType;
scope.allTracks = false;
scope.trackIds.clear();
}
continue;
} else if (applyTargetConfiguration(scope.tagTarget, fieldDenotationString)) {
continue;
} else if (!strncmp(fieldDenotationString, "track-id=", 9)) {
const vector<string> parts = splitString<vector<string>>(fieldDenotationString + 9, ",", EmptyPartsTreat::Omit);
bool allTracks = false;
vector<std::uint64_t> trackIds;
trackIds.reserve(parts.size());
for (const auto &part : parts) {
if (part == "all" || part == "any") {
allTracks = true;
break;
}
try {
trackIds.emplace_back(stringToNumber<std::uint64_t>(part));
} catch (const ConversionException &) {
cerr << Phrases::Error << "The value provided with the \"track\"-specifier is invalid." << Phrases::End
<< "note: It must be a comma-separated list of track IDs." << endl;
exit(-1);
}
}
scope.allTracks = allTracks;
scope.trackIds = move(trackIds);
continue;
}
// check whether field name starts with + indicating an additional value
bool additionalValue = *fieldDenotationString == '+';
if (additionalValue) {
++fieldDenotationString;
}
// read field name
const auto equationPos = strchr(fieldDenotationString, '=');
size_t fieldNameLen = equationPos ? static_cast<size_t>(equationPos - fieldDenotationString) : strlen(fieldDenotationString);
// field name might denote increment ("+") or path disclosure (">")
DenotationType type = DenotationType::Normal;
if (fieldNameLen && equationPos) {
switch (*(equationPos - 1)) {
case '+':
type = DenotationType::Increment;
--fieldNameLen;
break;
case '>':
type = DenotationType::File;
--fieldNameLen;
break;
default:;
}
}
// field name might specify a file index
unsigned int fileIndex = 0, mult = 1;
for (const char *digitPos = fieldDenotationString + fieldNameLen - 1; fieldNameLen && isDigit(*digitPos);
--fieldNameLen, --digitPos, mult *= 10) {
fileIndex += static_cast<unsigned int>(*digitPos - '0') * mult;
}
if (!fieldNameLen) {
cerr << Phrases::Error << "The field denotation \"" << fieldDenotationString << "\" has no field name." << Phrases::EndFlush;
exit(-1);
}
// parse the denoted field ID
try {
if (scope.isTrack()) {
scope.field = FieldId::fromTrackDenotation(fieldDenotationString, fieldNameLen);
} else {
scope.field = FieldId::fromTagDenotation(fieldDenotationString, fieldNameLen);
}
} catch (const ConversionException &e) {
// unable to parse field ID denotation -> discard the field denotation
cerr << Phrases::Error << "The field denotation \"" << string(fieldDenotationString, fieldNameLen)
<< "\" could not be parsed: " << e.what() << Phrases::EndFlush;
exit(-1);
}
// read cover always from file
if (scope.field.knownField() == KnownField::Cover) {
type = DenotationType::File;
}
// add field denotation scope
auto &fieldValues = fields[scope];
// add value to the scope (if present)
if (equationPos) {
if (readOnly) {
cerr << Phrases::Error << "A value has been specified for \"" << string(fieldDenotationString, fieldNameLen) << "\"." << Phrases::End
<< "note: This is only possible when the \"set\"-operation is used." << endl;
exit(-1);
} else {
// file index might have been specified explicitely
// if not (mult == 1) use the index of the last value and increase it by one if the value is not an additional one
// if there are no previous values, just use the index 0
fieldValues.allValues.emplace_back(type,
mult == 1 ? (fieldValues.allValues.empty() ? 0 : fieldValues.allValues.back().fileIndex + (additionalValue ? 0 : 1)) : fileIndex,
equationPos + 1);
}
}
if (additionalValue && readOnly) {
cerr << Phrases::Error << "Indication of an additional value for \"" << string(fieldDenotationString, fieldNameLen) << "\" is invalid."
<< Phrases::End << "note: This is only possible when the \"set\"-operation is used." << endl;
exit(-1);
}
}
return fields;
}
template <class ConcreteTag, TagType tagTypeMask = ConcreteTag::tagType>
static std::pair<std::vector<const TagValue *>, bool> valuesForNativeField(std::string_view idString, const Tag *tag, TagType tagType)
{
auto res = make_pair<std::vector<const TagValue *>, bool>({}, false);
if (!(tagType & tagTypeMask)) {
return res;
}
res.first = static_cast<const ConcreteTag *>(tag)->values(ConcreteTag::FieldType::fieldIdFromString(idString));
res.second = true;
return res;
}
template <class ConcreteTag, TagType tagTypeMask = ConcreteTag::tagType>
static bool setValuesForNativeField(std::string_view idString, Tag *tag, TagType tagType, const std::vector<TagValue> &values)
{
if (!(tagType & tagTypeMask)) {
return false;
}
return static_cast<ConcreteTag *>(tag)->setValues(ConcreteTag::FieldType::fieldIdFromString(idString), values);
}
template <class ConcreteTag, TagType tagTypeMask = ConcreteTag::tagType>
static KnownField knownFieldForNativeField(std::string_view idString, const Tag *tag, TagType tagType)
{
if (!(tagType & tagTypeMask)) {
return KnownField::Invalid;
}
try {
return static_cast<const ConcreteTag *>(tag)->knownField(ConcreteTag::FieldType::fieldIdFromString(idString));
} catch (const ConversionException &) {
return KnownField::Invalid;
}
}
inline FieldId::FieldId(std::string_view nativeField, GetValuesForNativeFieldType &&valuesForNativeField,
SetValuesForNativeFieldType &&setValuesForNativeField, KnownFieldForNativeFieldType &&knownFieldForNativeField)
: m_knownField(KnownField::Invalid)
, m_nativeField(nativeField)
, m_valuesForNativeField(std::move(valuesForNativeField))
, m_setValuesForNativeField(std::move(setValuesForNativeField))
, m_knownFieldForNativeField(std::move(knownFieldForNativeField))
{
}
/// \remarks This wrapper is required because specifying c'tor template args is not possible.
template <class ConcreteTag, TagType tagTypeMask> FieldId FieldId::fromNativeField(std::string_view nativeFieldId)
{
return FieldId(nativeFieldId, std::bind(&valuesForNativeField<ConcreteTag, tagTypeMask>, nativeFieldId, _1, _2),
std::bind(&setValuesForNativeField<ConcreteTag, tagTypeMask>, nativeFieldId, _1, _2, _3),
std::bind(&knownFieldForNativeField<ConcreteTag, tagTypeMask>, nativeFieldId, _1, _2));
}
FieldId FieldId::fromTagDenotation(const char *denotation, size_t denotationSize)
{
// check for native, format-specific denotation
if (!strncmp(denotation, "mkv:", 4)) {
return FieldId::fromNativeField<MatroskaTag>(std::string_view(denotation + 4, denotationSize - 4));
} else if (!strncmp(denotation, "mp4:", 4)) {
return FieldId::fromNativeField<Mp4Tag>(std::string_view(denotation + 4, denotationSize - 4));
} else if (!strncmp(denotation, "vorbis:", 7)) {
return FieldId::fromNativeField<VorbisComment, TagType::VorbisComment | TagType::OggVorbisComment>(
std::string_view(denotation + 7, denotationSize - 7));
} else if (!strncmp(denotation, "id3:", 7)) {
return FieldId::fromNativeField<Id3v2Tag>(std::string_view(denotation + 4, denotationSize - 4));
} else if (!strncmp(denotation, "generic:", 8)) {
// allow prefix 'generic:' for consistency
denotation += 8, denotationSize -= 8;
}
// determine KnownField for generic denotation
const auto knownField(FieldMapping::knownField(denotation, denotationSize));
if (knownField == KnownField::Invalid) {
throw ConversionException("generic field name is unknown");
}
return FieldId(knownField, nullptr, 0);
}
FieldId FieldId::fromTrackDenotation(const char *denotation, size_t denotationSize)
{
return FieldId(KnownField::Invalid, denotation, denotationSize);
}
std::pair<std::vector<const TagValue *>, bool> FieldId::values(const Tag *tag, TagType tagType) const
{
auto res = make_pair<std::vector<const TagValue *>, bool>({}, false);
if (!m_nativeField.empty()) {
res = m_valuesForNativeField(tag, tagType);
} else {
res.first = tag->values(m_knownField);
res.second = true;
}
return res;
}
bool FieldId::setValues(Tag *tag, TagType tagType, const std::vector<TagValue> &values) const
{
if (!m_nativeField.empty()) {
return m_setValuesForNativeField(tag, tagType, values);
} else {
return tag->setValues(m_knownField, values);
}
}
KnownField FieldId::knownFieldForTag(const Tag *tag, TagType tagType) const
{
if (!m_nativeField.empty()) {
return m_knownFieldForNativeField(tag, tagType);
} else {
return m_knownField;
}
}
string tagName(const Tag *tag)
{
stringstream ss;
const TagType tagType = tag->type();
// write tag name and target, eg. MP4/iTunes tag
ss << tag->typeName();
if (tagType == TagType::Id3v2Tag) {
// version only interesting for ID3v2 tags?
ss << " (version " << tag->version() << ')';
}
if (tagType == TagType::MatroskaTag || !tag->target().isEmpty()) {
ss << " targeting \"" << tag->targetString() << '\"';
}
return ss.str();
}
bool stringToBool(const string &str)
{
if (str == "yes" || str == "true" || str == "on" || str == "1") {
return true;
} else if (str == "no" || str == "false" || str == "off" || str == "0") {
return false;
}
throw ConversionException(argsToString('\"', str, "\" is not yes or no"));
}
bool logLineFinalized = true;
static string lastStep;
void logNextStep(const AbortableProgressFeedback &progress)
{
// finalize previous step
if (!logLineFinalized) {
cout << "\r - [100%] " << lastStep << endl;
logLineFinalized = true;
}
// print line for next step
lastStep = progress.step();
cout << "\r - [" << setw(3) << static_cast<unsigned int>(progress.stepPercentage()) << "%] " << lastStep << flush;
logLineFinalized = false;
}
void logStepPercentage(const TagParser::AbortableProgressFeedback &progress)
{
cout << "\r - [" << setw(3) << static_cast<unsigned int>(progress.stepPercentage()) << "%] " << lastStep << flush;
}
void finalizeLog()
{
if (logLineFinalized) {
return;
}
cout << "\r - [100%] " << lastStep << '\n';
logLineFinalized = true;
lastStep.clear();
}
} // namespace Cli