Finished fourth tutorial

screeps.com/tutorial-4/main.js

@@ -0,0 +1,41 @@
+var roleHarvester = require('role.harvester');
+var roleUpgrader = require('role.upgrader');
+
+module.exports.loop = function () {
+
+    for(var name in Memory.creeps) {
+        if(!Game.creeps[name]) {
+            delete Memory.creeps[name];
+            console.log('Clearing non-existing creep memory:', name);
+        }
+    }
+
+    var harvesters = _.filter(Game.creeps, (creep) => creep.memory.role == 'harvester');
+    console.log('Harvesters: ' + harvesters.length);
+
+    if(harvesters.length < 2) {
+        var newName = 'Harvester' + Game.time;
+        console.log('Spawning new harvester: ' + newName);
+        Game.spawns['Spawn1'].spawnCreep([WORK,CARRY,MOVE], newName, 
+            {memory: {role: 'harvester'}});
+    }
+    
+    if(Game.spawns['Spawn1'].spawning) { 
+        var spawningCreep = Game.creeps[Game.spawns['Spawn1'].spawning.name];
+        Game.spawns['Spawn1'].room.visual.text(
+            '🛠️' + spawningCreep.memory.role,
+            Game.spawns['Spawn1'].pos.x + 1, 
+            Game.spawns['Spawn1'].pos.y, 
+            {align: 'left', opacity: 0.8});
+    }
+
+    for(var name in Game.creeps) {
+        var creep = Game.creeps[name];
+        if(creep.memory.role == 'harvester') {
+            roleHarvester.run(creep);
+        }
+        if(creep.memory.role == 'upgrader') {
+            roleUpgrader.run(creep);
+        }
+    }
+}

screeps.com/tutorial-4/role.harvester.js

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+var roleHarvester = {
+
+    /** @param {Creep} creep **/
+    run: function(creep) {
+	    if(creep.store.getFreeCapacity() > 0) {
+            var sources = creep.room.find(FIND_SOURCES);
+            if(creep.harvest(sources[0]) == ERR_NOT_IN_RANGE) {
+                creep.moveTo(sources[0], {visualizePathStyle: {stroke: '#ffaa00'}});
+            }
+        }
+        else {
+            var targets = creep.room.find(FIND_STRUCTURES, {
+                    filter: (structure) => {
+                        return (structure.structureType == STRUCTURE_EXTENSION || structure.structureType == STRUCTURE_SPAWN) &&
+                            structure.store.getFreeCapacity(RESOURCE_ENERGY) > 0;
+                    }
+            });
+            if(targets.length > 0) {
+                if(creep.transfer(targets[0], RESOURCE_ENERGY) == ERR_NOT_IN_RANGE) {
+                    creep.moveTo(targets[0], {visualizePathStyle: {stroke: '#ffffff'}});
+                }
+            }
+        }
+	}
+};
+
+module.exports = roleHarvester;

screeps.com/tutorial-4/role.upgrader.js

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+var roleUpgrader = {
+
+    /** @param {Creep} creep **/
+    run: function(creep) {
+
+        if(creep.memory.upgrading && creep.store[RESOURCE_ENERGY] == 0) {
+            creep.memory.upgrading = false;
+            creep.say('🔄 harvest');
+	    }
+	    if(!creep.memory.upgrading && creep.store.getFreeCapacity() == 0) {
+	        creep.memory.upgrading = true;
+	        creep.say('⚡ upgrade');
+	    }
+
+	    if(creep.memory.upgrading) {
+            if(creep.upgradeController(creep.room.controller) == ERR_NOT_IN_RANGE) {
+                creep.moveTo(creep.room.controller, {visualizePathStyle: {stroke: '#ffffff'}});
+            }
+        }
+        else {
+            var sources = creep.room.find(FIND_SOURCES);
+            if(creep.harvest(sources[0]) == ERR_NOT_IN_RANGE) {
+                creep.moveTo(sources[0], {visualizePathStyle: {stroke: '#ffaa00'}});
+            }
+        }
+	}
+};
+
+module.exports = roleUpgrader;