prototype.structures.js

// This is called during global reset to set up structure memory,
// because it doesn't need to be called often.
if(!Memory.structures) {
    console.log('[Memory] Initializing structure memory');
    Memory.structures = {};
}

// Adds structure memory to OwnedStructure things.
// Easier to reason about garbage collection in this implementation.
Object.defineProperty(OwnedStructure.prototype, "memory", {
    get: function () {
        if(!Memory.structures[this.id]) {
            Memory.structures[this.id] = {};
        }
        return Memory.structures[this.id];
    },
    set: function(v) {
        return _.set(Memory, 'structures.' + this.id, v);
    },
    configurable: true,
    enumerable: false
});

// Call this periodically to garbage collect structure memory
// (I find once every 10k ticks is fine)
global.GCStructureMemory = function() {
    for (var id in Memory.structures ) {
        if(!Game.structures[id]) {
            console.log("Garbage collecting structure " + id + ', ' + JSON.stringify(Memory.structures[id]));
            delete Memory.structures[id];
        }
    }
}