eliasdb/examples/game/res/scripts/main.ecal

import "./templates.ecal" as tmpl
import "./const.ecal" as const
import "./helper.ecal" as hlp
import "./engine.ecal" as engine

/*
 Get details of a game world.

 Endpoint: /db/ecal/game
*/
sink GetGameWorld
    kindmatch ["db.web.ecal"]
    statematch {"path" : "game", "method" : "GET"}
    priority 10
{
    let gameWorld

    try {
        gameName := event.state.query.gameName[0]

        if gameName != "main" {
            raise(const.Errors.EntityNotFound, "Game world {{gameName}} not found")
        }

        gameWorld := tmpl.newGameWorld(gameName)

        if db.fetchNode(gameName, gameName, const.NodeKinds.ConfigurationObject) == null {
            db.storeNode(gameName, gameWorld)

            sprite := tmpl.newSpriteNode("asteroid", 300, 300, 40, 20, 0.01)
            db.storeNode(gameName, sprite)
        }
    } except e {
        error(e)
        db.raiseWebEventHandled({"code" : const.ErrorCodes[e.type], "body" : {"error" : e.type}})
    } otherwise {
        db.raiseWebEventHandled({"code" : 200, "body" : {"result" : "success", "gameworld" : gameWorld}})
    }
}


/*
 Register a new player.

 Endpoint: /db/ecal/player
*/
sink RegisterNewPlayer
    kindmatch ["db.web.ecal"]
    statematch {"path" : "player", "method" : "POST"}
    priority 10
{
    let sprite
    let gameWorld

    try {
        let playerName := event.state.bodyJSON.player
        let gameName := event.state.bodyJSON.gameName

        gameWorld := tmpl.DefaultGameWorld

        if db.fetchNode(gameName, playerName, const.NodeKinds.GameWorldObject) == null {
            sprite := tmpl.newSpriteNode(event.state.bodyJSON.player, 21, 21)
            db.storeNode(gameName, sprite)
        }

        log("Registered player: ", playerName, " for game:", gameName)
    } except e {
        error(e)
        db.raiseWebEventHandled({"code" : const.ErrorCodes["InternalError"], "body" : {"error" : const.Errors.InternalError}})
    } otherwise {
        db.raiseWebEventHandled({"code" : 200, "body" : {
                "result" : "success",
                "sprite" : sprite,
                "gameworld" : gameWorld
        }})
    }
}


/*
 Process player input.

 Endpoint: /db/ecal/input
*/
sink PlayerInput
    kindmatch ["db.web.ecal"]
    statematch {"path" : "input", "method" : "POST"}
    priority 10
{
    let sprite
    let gameWorld

    try {
        let playerName := event.state.bodyJSON.player
        let gameName := event.state.bodyJSON.gameName
        let state := event.state.bodyJSON.state

        state["key"] := playerName
        state["kind"] := const.NodeKinds.GameWorldObject

        db.updateNode(gameName, state)

        log("Updated player: ", playerName, " for game:", gameName, " with state:", state)
    } except e {
        error(e)
        db.raiseWebEventHandled({"code" : const.ErrorCodes["InternalError"], "body" : {"error" : const.Errors.InternalError}})
    } otherwise {
        db.raiseWebEventHandled({"code" : 200, "body" : {
                "result" : "success",
                "sprite" : sprite,
                "gameworld" : gameWorld
        }})
    }
}


/*
 Object for main game engine.
*/
MainGameEngine := new(engine.GameEngine, "main", tmpl.DefaultGameWorld)

/*
 GameLoop sink.
*/
sink MainGameLoop
    kindmatch ["main.gameloop"]
    priority 100
{
    try {
        MainGameEngine.moveLoop()
    } except e {
        error("Gameloop:", e)
    }
}


/*
 Trigger the main game loop in a set interval (microseconds). The interval here
 must always be greater than the total time of the move loop (see the time_total_move
 stat recorded in engine.ecal).

 55000 - 55 milli seconds - smooth animation calculated in the backend, frontend only needs to display

*/
setPulseTrigger(55000, "Main Game Loop", "main.gameloop")