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Fix trainer buy packet and grey out unmet prerequisites

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CMSG_TRAINER_BUY_SPELL was missing the trainerId field — server expects
guid(8) + trainerId(4) + spellId(4) = 16 bytes, not 12. Spells with
unmet prerequisites (chainNode1/2/3), insufficient level, or already
known are now greyed out with disabled Train buttons. Tooltips show
prerequisite status in green/red.
This commit is contained in:
Kelsi 2026-02-08 15:03:43 -08:00
parent ee155c3367
commit eb92a71b71
4 changed files with 39 additions and 13 deletions
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42
src/ui/game_screen.cpp
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@ -3566,8 +3566,10 @@ void GameScreen::renderTrainerWindow(game::GameHandler& gameHandler) {
// Known spells for checking
const auto& knownSpells = gameHandler.getKnownSpells();
auto isKnown = [&](uint32_t id) {
if (id == 0) return true;
return std::find(knownSpells.begin(), knownSpells.end(), id) != knownSpells.end();
};
uint32_t playerLevel = gameHandler.getPlayerLevel();
// Renders spell rows into the current table
auto renderSpellRows = [&](const std::vector<const game::TrainerSpell*>& spells) {
@ -3575,12 +3577,19 @@ void GameScreen::renderTrainerWindow(game::GameHandler& gameHandler) {
ImGui::TableNextRow();
ImGui::PushID(static_cast<int>(spell->spellId));
// Check prerequisites client-side
bool prereqsMet = isKnown(spell->chainNode1)
&& isKnown(spell->chainNode2)
&& isKnown(spell->chainNode3);
bool levelMet = (spell->reqLevel == 0 || playerLevel >= spell->reqLevel);
bool alreadyKnown = (spell->state == 0) || isKnown(spell->spellId);
ImVec4 color;
const char* statusLabel;
if (spell->state == 0 || isKnown(spell->spellId)) {
if (alreadyKnown) {
color = ImVec4(0.3f, 0.9f, 0.3f, 1.0f);
statusLabel = "Known";
} else if (spell->state == 1) {
} else if (spell->state == 1 && prereqsMet && levelMet) {
color = ImVec4(1.0f, 1.0f, 1.0f, 1.0f);
statusLabel = "Available";
} else {
@ -3608,13 +3617,24 @@ void GameScreen::renderTrainerWindow(game::GameHandler& gameHandler) {
if (!rank.empty()) ImGui::TextColored(ImVec4(0.7f, 0.7f, 0.7f, 1.0f), "%s", rank.c_str());
}
ImGui::Text("Status: %s", statusLabel);
if (spell->reqLevel > 0) ImGui::Text("Required Level: %u", spell->reqLevel);
if (spell->reqSkill > 0) ImGui::Text("Required Skill: %u (value %u)", spell->reqSkill, spell->reqSkillValue);
if (spell->chainNode1 > 0) {
const std::string& prereq = gameHandler.getSpellName(spell->chainNode1);
if (!prereq.empty()) ImGui::Text("Requires: %s", prereq.c_str());
else ImGui::Text("Requires: Spell #%u", spell->chainNode1);
if (spell->reqLevel > 0) {
ImVec4 lvlColor = levelMet ? ImVec4(0.7f, 0.7f, 0.7f, 1.0f) : ImVec4(1.0f, 0.3f, 0.3f, 1.0f);
ImGui::TextColored(lvlColor, "Required Level: %u", spell->reqLevel);
}
if (spell->reqSkill > 0) ImGui::Text("Required Skill: %u (value %u)", spell->reqSkill, spell->reqSkillValue);
auto showPrereq = [&](uint32_t node) {
if (node == 0) return;
bool met = isKnown(node);
const std::string& pname = gameHandler.getSpellName(node);
ImVec4 pcolor = met ? ImVec4(0.3f, 0.9f, 0.3f, 1.0f) : ImVec4(1.0f, 0.3f, 0.3f, 1.0f);
if (!pname.empty())
ImGui::TextColored(pcolor, "Requires: %s%s", pname.c_str(), met ? " (known)" : "");
else
ImGui::TextColored(pcolor, "Requires: Spell #%u%s", node, met ? " (known)" : "");
};
showPrereq(spell->chainNode1);
showPrereq(spell->chainNode2);
showPrereq(spell->chainNode3);
ImGui::EndTooltip();
}
@ -3635,9 +3655,11 @@ void GameScreen::renderTrainerWindow(game::GameHandler& gameHandler) {
ImGui::TextColored(color, "Free");
}
// Train button
// Train button - only enabled if available, affordable, prereqs met
ImGui::TableSetColumnIndex(3);
bool canTrain = (spell->state == 1) && (money >= spell->spellCost);
bool canTrain = !alreadyKnown && spell->state == 1
&& prereqsMet && levelMet
&& (money >= spell->spellCost);
if (!canTrain) ImGui::BeginDisabled();
if (ImGui::SmallButton("Train")) {
gameHandler.trainSpell(spell->spellId);