exercise.cairo

// starknet3.cairo
// Joe liked Jill's work very much. He really likes how useful storage can be.
// Now they decided to write a contract to track the number of exercises they
// complete successfully. Jill says they can use the owner code and allow
// only the owner to update the contract, they agree.
// Can you help them write this contract?

// I AM NOT DONE

use starknet::ContractAddress;
#[starknet::interface]
trait IProgressTracker<TContractState>{
  fn set_progress(ref self:TContractState, user:ContractAddress, new_progress: u16);
  fn get_progress(self:@TContractState ,user: ContractAddress) -> u16;
  fn get_contract_owner(self:@TContractState) -> ContractAddress;
}

#[starknet::contract]
mod ProgressTracker {
    use starknet::ContractAddress;
    use starknet::get_caller_address; // Required to use get_caller_address function

    #[storage]
    struct Storage {
        contract_owner: ContractAddress,
        // TODO: Set types for LegacyMap
        progress: LegacyMap<ContractAddress, u16>
    }

    #[constructor]
    fn constructor(ref self:ContractState,owner: ContractAddress) {
       self.contract_owner.write(owner);
    }

   
    #[external(v0)]
      impl ProgressTrackerImpl of super::IProgressTracker<ContractState>{

      fn set_progress(ref self: ContractState, user: ContractAddress, new_progress: u16) {
      // TODO: assert owner is calling
      let caller = get_caller_address();
      assert(caller == self.contract_owner.read(), 'not_owner');
      // TODO: set new_progress for user,
      self.progress.write(user, new_progress);
      }

      fn get_progress(self:@ContractState ,user: ContractAddress) -> u16 {
          // Get user progress
          self.progress.read(user)
      }

        fn get_contract_owner(self:@ContractState) -> ContractAddress{
          self.contract_owner.read()
        }
      }
}

#[cfg(test)]
mod test {
    use starknet::ContractAddress;
    use array::ArrayTrait;
    use array::SpanTrait;
    use debug::PrintTrait;
    use traits::TryInto;
    use starknet::syscalls::deploy_syscall;
    use core::result::ResultTrait;

    use starknet::Felt252TryIntoContractAddress;
    use option::OptionTrait;
    use super::IProgressTrackerDispatcher;
    use super::IProgressTrackerDispatcherTrait;
    use super::ProgressTracker;

    #[test]
    #[available_gas(2000000000)]
    fn test_owner() {
      let owner: ContractAddress = 'Sensei'.try_into().unwrap();
      let dispatcher = deploy_contract();
      assert(owner == dispatcher.get_contract_owner(), 'Mr. Sensei should be the owner');
    }

    #[test]
    #[available_gas(2000000000)]
    fn test_set_progress() {
        let owner = util_felt_addr('Sensei');
        let dispatcher = deploy_contract();

        // Call contract as owner
        starknet::testing::set_caller_address(owner);
        let owner = dispatcher.get_contract_owner();
        owner.print();

        // Set progress
        dispatcher.set_progress('Joe'.try_into().unwrap(), 20);
        dispatcher.set_progress('Jill'.try_into().unwrap(), 25);

        let joe_score = dispatcher.get_progress('Joe'.try_into().unwrap());
        assert(joe_score == 20, 'Joe\'s progress should be 20');
    }

    #[test]
    #[should_panic]
    #[available_gas(2000000000)]
    fn test_set_progress_fail() {
       let dispatcher = deploy_contract();

        let jon_doe = util_felt_addr('JonDoe');
        // Caller not owner
        starknet::testing::set_caller_address(jon_doe);

        // Try to set progress, should panic to pass test!
        dispatcher.set_progress('Joe'.try_into().unwrap(), 20);
    }

    fn util_felt_addr(addr_felt: felt252) -> ContractAddress {
        addr_felt.try_into().unwrap()
    }

     fn deploy_contract() -> IProgressTrackerDispatcher {
        let owner: felt252 = 'Sensei';
        let mut calldata = ArrayTrait::new();
        calldata.append(owner);
        let (address0, _) = deploy_syscall(
            ProgressTracker::TEST_CLASS_HASH.try_into().unwrap(), 0, calldata.span(), false
        ).unwrap();
        let contract0 = IProgressTrackerDispatcher { contract_address: address0 };
        contract0
    }
}