Function setId3v2CoverValues

cli/scriptapi.cpp:541–572

/// \brief Sets the first of the specified \a values as front-cover with no description replacing any existing cover values.
template <class TagType> static void setId3v2CoverValues(TagType *tag, std::vector<TagParser::TagValue> &&values)
{
    auto &fields = tag->fields();
    const auto id = tag->fieldId(TagParser::KnownField::Cover);
    const auto range = fields.equal_range(id);
    const auto first = range.first;

    constexpr auto coverType = CoverType(3); // assume front cover
    constexpr auto description = std::optional<std::string_view>(); // assume no description

    for (auto &tagValue : values) {
        // check whether there is already a tag value with the current type and description
        auto pair = std::find_if(first, range.second, std::bind(&fieldPredicate<TagType>, coverType, description, std::placeholders::_1));
        if (pair != range.second) {
            // there is already a tag value with the current type and description
            // -> update this value
            pair->second.setValue(tagValue);
            // check whether there are more values with the current type and description
            while ((pair = std::find_if(++pair, range.second, std::bind(&fieldPredicate<TagType>, coverType, description, std::placeholders::_1)))
                != range.second) {
                // -> remove these values as we only support one value of a type/description in the same tag
                pair->second.setValue(TagParser::TagValue());
            }
        } else if (!tagValue.isEmpty()) {
            using FieldType = typename TagType::FieldType;
            auto newField = FieldType(id, tagValue);
            newField.setTypeInfo(static_cast<typename FieldType::TypeInfoType>(coverType));
            fields.insert(std::pair(id, std::move(newField)));
        }
        break; // allow only setting one value for now
    }
}

void TagObject::applyChanges()
{