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/* News.cpp
Copyright (c) 2017 by Michael Zahniser
Endless Sky is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later version.
Endless Sky is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "News.h"
#include "DataNode.h"
#include "Random.h"
#include "image/SpriteSet.h"
#include <algorithm>
using namespace std;
void News::Load(const DataNode &node, const ConditionsStore *playerConditions,
const set<const System *> *visitedSystems, const set<const Planet *> *visitedPlanets)
{
for(const DataNode &child : node)
{
const bool add = (child.Token(0) == "add");
const bool remove = (child.Token(0) == "remove");
if((add || remove) && child.Size() < 2)
{
child.PrintTrace("Skipping " + child.Token(0) + " with no key given:");
continue;
}
// Get the key and value (if any).
const string &tag = child.Token((add || remove) ? 1 : 0);
const int valueIndex = (add || remove) ? 2 : 1;
const bool hasValue = child.Size() > valueIndex;
if(tag == "location")
{
if(add && !location.IsEmpty())
child.PrintTrace("Error: Cannot \"add\" to an existing location filter:");
else if(remove)
{
location = LocationFilter{};
if(child.HasChildren())
child.PrintTrace("Warning: Removing full location filter; partial removal is not supported:");
}
else
location.Load(child, visitedSystems, visitedPlanets);
}
else if(tag == "name")
{
if(remove)
{
speakerNames = Phrase{};
if(child.HasChildren())
child.PrintTrace("Warning: Removing all names; removal of individual names is not supported:");
}
else
speakerNames.Load(child);
}
else if(tag == "portrait")
{
if(remove && !hasValue)
portraits.clear();
else if(remove)
{
// Collect all values to be removed.
auto toRemove = set<const Sprite *>{};
for(int i = valueIndex; i < child.Size(); ++i)
toRemove.emplace(SpriteSet::Get(child.Token(i)));
// Erase them in unison.
portraits.erase(remove_if(portraits.begin(), portraits.end(),
[&toRemove](const Sprite *sprite) { return toRemove.find(sprite) != toRemove.end(); }),
portraits.end());
}
else
{
for(int i = valueIndex; i < child.Size(); ++i)
portraits.push_back(SpriteSet::Get(child.Token(i)));
for(const DataNode &grand : child)
portraits.push_back(SpriteSet::Get(grand.Token(0)));
}
}
else if(tag == "message")
{
if(remove)
{
messages = Phrase{};
if(child.HasChildren())
child.PrintTrace("Warning: Removing all messages; removal of single messages is not supported:");
}
else
messages.Load(child);
}
else if(tag == "to" && hasValue && child.Token(valueIndex) == "show")
{
if(add && !toShow.IsEmpty())
child.PrintTrace("Error: Cannot \"add\" to an existing condition set:");
else if(remove)
{
toShow = ConditionSet{};
if(child.HasChildren())
child.PrintTrace("Warning: Removing all conditions; removal of condition subsets is not supported:");
}
else
toShow.Load(child, playerConditions);
}
else
child.PrintTrace("Skipping unrecognized attribute:");
}
}
bool News::IsEmpty() const
{
return messages.IsEmpty() || speakerNames.IsEmpty();
}
// Check if this news item is available given the player's planet.
bool News::Matches(const Planet *planet) const
{
// If no location filter is specified, it should never match. This can be
// used to create news items that are never shown until an event "activates"
// them by specifying their location.
// Similarly, by updating a news item with "remove location", it can be deactivated.
return location.IsEmpty() ? false : (location.Matches(planet) && toShow.Test());
}
// Get the speaker's name.
string News::SpeakerName() const
{
return speakerNames.Get();
}
// Pick a portrait at random out of the possible options.
const Sprite *News::Portrait() const
{
return portraits.empty() ? nullptr : portraits[Random::Int(portraits.size())];
}
// Get the speaker's message, chosen randomly.
string News::Message() const
{
return messages.Get();
}
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