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Add Quest Participant Limit Feature #225

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Add Quest Participant Limit Feature #225

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52 changes: 52 additions & 0 deletions contracts/quest_chain/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,7 @@ pub struct QuestChain {
pub total_reward: i128,
pub start_time: Option<u64>, // None = no time limit
pub end_time: Option<u64>, // None = no time limit
pub max_participants: Option<u32>, // None = no participant limit
pub created_at: u64,
pub active: bool,
}
Expand Down Expand Up @@ -94,6 +95,7 @@ pub enum DataKey {
PlayerProgress(Address, u32), // PlayerProgress - (player, chain_id)
CompletionLeaderboard(u32), // Vec<CompletionRecord> - sorted by duration (fastest first)
ChainCompletions(u32), // u32 - total completions for chain
ChainParticipants(u32), // u32 - current participant count for chain
RewardPool(u32), // i128 - reward pool for chain (if using token rewards)
PendingRewards(Address, u32), // i128 - pending rewards for player in chain
}
Expand Down Expand Up @@ -170,6 +172,7 @@ impl QuestChainContract {
/// * `quests` - Vector of quests in the chain
/// * `start_time` - Optional start time (None for no time limit)
/// * `end_time` - Optional end time (None for no time limit)
/// * `max_participants` - Optional maximum participants (None for no limit)
pub fn create_chain(
env: Env,
admin: Address,
Expand All @@ -178,6 +181,7 @@ impl QuestChainContract {
quests: Vec<Quest>,
start_time: Option<u64>,
end_time: Option<u64>,
max_participants: Option<u32>,
) -> u32 {
admin.require_auth();
Self::assert_admin(&env, &admin);
Expand Down Expand Up @@ -221,6 +225,7 @@ impl QuestChainContract {
total_reward,
start_time,
end_time,
max_participants,
created_at: env.ledger().timestamp(),
active: true,
};
Expand All @@ -230,6 +235,9 @@ impl QuestChainContract {
env.storage()
.persistent()
.set(&DataKey::ChainCompletions(counter), &0u32);
env.storage()
.persistent()
.set(&DataKey::ChainParticipants(counter), &0u32);

// Initialize empty leaderboard
let leaderboard: Vec<CompletionRecord> = Vec::new(&env);
Expand Down Expand Up @@ -278,6 +286,18 @@ impl QuestChainContract {
}
}

// Check participant limit
if let Some(max) = chain.max_participants {
let current_participants: u32 = env
.storage()
.persistent()
.get(&DataKey::ChainParticipants(chain_id))
.unwrap_or(0);
if current_participants >= max {
panic!("Participant limit reached");
}
}

// Check if player already has progress
if env
.storage()
Expand All @@ -303,6 +323,17 @@ impl QuestChainContract {
env.storage()
.persistent()
.set(&DataKey::PlayerProgress(player.clone(), chain_id), &progress);

// Increment participant count
let mut participant_count: u32 = env
.storage()
.persistent()
.get(&DataKey::ChainParticipants(chain_id))
.unwrap_or(0);
participant_count += 1;
env.storage()
.persistent()
.set(&DataKey::ChainParticipants(chain_id), &participant_count);
}

/// Complete a quest in a chain
Expand Down Expand Up @@ -528,6 +559,19 @@ impl QuestChainContract {
.persistent()
.remove(&DataKey::PlayerProgress(player.clone(), chain_id));

// Decrement participant count
let mut participant_count: u32 = env
.storage()
.persistent()
.get(&DataKey::ChainParticipants(chain_id))
.unwrap_or(0);
if participant_count > 0 {
participant_count -= 1;
env.storage()
.persistent()
.set(&DataKey::ChainParticipants(chain_id), &participant_count);
}

// Clear pending rewards if any
if env
.storage()
Expand Down Expand Up @@ -589,6 +633,14 @@ impl QuestChainContract {
.unwrap_or(0)
}

/// Get current participant count for a chain
pub fn get_chain_participants(env: Env, chain_id: u32) -> u32 {
env.storage()
.persistent()
.get(&DataKey::ChainParticipants(chain_id))
.unwrap_or(0)
}

/// Get configuration
pub fn get_config(env: Env) -> ChainConfig {
env.storage().persistent().get(&DataKey::Config).unwrap()
Expand Down
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