Object property key same as another property value javaScript

Question

I have this object

            Memory.creepsConf = {
            //The role by which we will refer to the creep
            roles: {
                harvester: "Harvester",//Harvests energy and gives it to the spawn
                upgrader: "Upgrader",//Harvests energy and gives it to the Controller
                builder: "Builder",// Harvests energy and builds stuff
                healer: "Healer"// Harvests energy and heals
            },
            //the maximum number of creeps. Used by ControllerCreeps
            maximum: {
                harvester: 100,
                upgrader: 100,
                builder: 100,
                healer: 100
            },
            //The bare minimum needed. Used by ControllerCreeps
            minimum: {
                harvester: 20,
                upgrader: 10,
                builder: 5,
                healer: 2,
            },
            //Since not all creeps roles will be filled the Colony needs to know
            //which creeps are a priority.
            priority: {
                harvester: 10,
                upgrader: 20,
                builder: 8,
                healer: 7
            },
            build: {
                harvester: [CARRY,WORK,MOVE],
                upgrader: [CARRY,WORK,MOVE],
                builder: [CARRY,WORK,MOVE],
                healer: [MOVE,HEAL,MOVE]
            }
        }

As you can notice in roles I define the roles and in other parts I refer to each creep by role.

Another thing you can notice is that I am always using the key defined in roles and never the value. This is a problem, because if somebody provides me with "Harvester" i need to get the key out of roles and then use the key...making the value obsolete.

What I want to do is instead of saying harvester which is a key in roles I want to call the value of that key as a key in other objects

Something like this

            Memory.creepsConf = {
            //The role by which we will refer to the creep
            roles: {
                harvester: "Harvester",//Harvests energy and gives it to the spawn
                upgrader: "Upgrader",//Harvests energy and gives it to the Controller
                builder: "Builder",// Harvests energy and builds stuff
                healer: "Healer"// Harvests energy and heals
            },
            //the maximum number of creeps. Used by ControllerCreeps
            maximum: {
                Memory.creepsConf.roles.harvester: 100,
                Memory.creepsConf.roles.upgrader: 100,
                Memory.creepsConf.roles.builder: 100,
                Memory.creepsConf.roles.healer: 100
            },
            //The bare minimum needed. Used by ControllerCreeps
            minimum: {
                Memory.creepsConf.roles.harvester: 20,
                Memory.creepsConf.roles.upgrader: 10,
                Memory.creepsConf.roles.builder: 5,
                Memory.creepsConf.roles.healer: 2,
            },
            //Since not all creeps roles will be filled the Colony needs to know
            //which creeps are a priority.
            priority: {
                Memory.creepsConf.roles.harvester: 10,
                Memory.creepsConf.roles.upgrader: 20,
                Memory.creepsConf.roles.builder: 8,
                Memory.creepsConf.roles.healer: 7
            },
            build: {
                Memory.creepsConf.roles.harvester: [CARRY,WORK,MOVE],
                Memory.creepsConf.roles.upgrader: [CARRY,WORK,MOVE],
                Memory.creepsConf.roles.builder: [CARRY,WORK,MOVE],
                Memory.creepsConf.roles.healer: [MOVE,HEAL,MOVE]
            }
        }

What I want to end up with is the value of Memory.creepsConf.roles.* as a key represented in other objects so that if somebody provides me with the value Harvester I can actually use it as a key to get all needed information.

However this second piece of code doesn't work. I get

Unexpected token .

Is there a way to use the value of Memory.creepsConf.roles.* as a key in Memory.creepsConf.maximum, Memory.creepsConf.minimum, Memory.creepsConf.priority and Memory.creepsConf.build ?

In case this example is too big and hard to follow I will try to simplify it

var obj = {
    foo:"Foooo",
    obj.foo: "Wohooo"
}

This object now should have a key which is Foooo and obj['Foooo'] should return "Wohooo"

Answer 1

Why not use the roles as keys of the main configuration object:

Memory.config.creeps = {
    "Harvester": {
        maximum: 100, 
        minimum: 20, 
        priority: 10, 
        build: [CARRY, WORK, MOVE]
    }, {
    "Upgrader": {
        maximum: 100, 
        minimum: 10, 
        priority: 20, 
        build: [CARRY, WORK, MOVE]
    }
    ///...
};

Now you can just access the properties like this:

function getMinimumForRole(role){
    if (role in Memory.config) {
        return Memory.config[role].minimum;
    }
    throw "role " + role + " not found";
}

If you still want to go on the way you were working, then you could do it with two assignments using some ES6 syntax features:

const roles = { // temporary variable for keeping the rest short
    harvester: "Harvester",
    upgrader: "Upgrader",
    builder: "Builder",
    healer: "Healer"
};
Memory.creepsConf = {
    roles, // ES6 short notation
    maximum: {
        [roles.harvester]: 100, // ES6 computed property syntax
        [roles.upgrader]: 100,
        [roles.builder]: 100,
        [roles.healer]: 100
    },
    // ...etc
};