added priority modules

src/main/java/de/ellpeck/prettypipes/Registry.java

@@ -1,6 +1,7 @@
 package de.ellpeck.prettypipes;
 
 import de.ellpeck.prettypipes.items.ModuleItem;
+import de.ellpeck.prettypipes.pipe.modules.LowPriorityModuleItem;
 import de.ellpeck.prettypipes.pipe.modules.SpeedModuleItem;
 import de.ellpeck.prettypipes.pipe.modules.extraction.ExtractionModuleContainer;
 import de.ellpeck.prettypipes.pipe.modules.extraction.ExtractionModuleGui;
@@ -84,6 +85,7 @@ public final class Registry {
         registry.registerAll(createTieredModule("extraction_module", ExtractionModuleItem::new));
         registry.registerAll(createTieredModule("filter_module", FilterModuleItem::new));
         registry.registerAll(createTieredModule("speed_module", SpeedModuleItem::new));
+        registry.registerAll(createTieredModule("low_priority_module", LowPriorityModuleItem::new));
 
         ForgeRegistries.BLOCKS.getValues().stream()
                 .filter(b -> b.getRegistryName().getNamespace().equals(PrettyPipes.ID))

src/main/java/de/ellpeck/prettypipes/network/PipeNetwork.java

@@ -1,5 +1,6 @@
 package de.ellpeck.prettypipes.network;
 
+import com.google.common.collect.Lists;
 import com.google.common.collect.Streams;
 import de.ellpeck.prettypipes.PrettyPipes;
 import de.ellpeck.prettypipes.Registry;
@@ -255,22 +256,20 @@ public class PipeNetwork implements ICapabilitySerializable<CompoundNBT>, GraphL
         return ret;
     }
 
+    public void clearDestinationCache(BlockPos... nodes) {
+        this.startProfile("clear_node_cache");
+        this.nodeToConnectedNodes.values().removeIf(cached -> Arrays.stream(nodes).anyMatch(cached::contains));
+        this.endProfile();
+    }
+
     @Override
     public void edgeAdded(GraphEdgeChangeEvent<BlockPos, NetworkEdge> e) {
-        this.edgeModified(e);
+        this.clearDestinationCache(e.getEdgeSource(), e.getEdgeTarget());
     }
 
     @Override
     public void edgeRemoved(GraphEdgeChangeEvent<BlockPos, NetworkEdge> e) {
-        this.edgeModified(e);
+        this.clearDestinationCache(e.getEdgeSource(), e.getEdgeTarget());
-    }
-
-    private void edgeModified(GraphEdgeChangeEvent<BlockPos, NetworkEdge> e) {
-        // uncache all connection infos that contain the removed edge's vertices
-        this.startProfile("clear_node_cache");
-        this.nodeToConnectedNodes.values().removeIf(
-                nodes -> nodes.stream().anyMatch(n -> n.equals(e.getEdgeSource()) || n.equals(e.getEdgeTarget())));
-        this.endProfile();
     }
 
     @Override

src/main/java/de/ellpeck/prettypipes/pipe/PipeTileEntity.java

@@ -4,6 +4,7 @@ import de.ellpeck.prettypipes.PrettyPipes;
 import de.ellpeck.prettypipes.Registry;
 import de.ellpeck.prettypipes.items.IModule;
 import de.ellpeck.prettypipes.network.PipeItem;
+import de.ellpeck.prettypipes.network.PipeNetwork;
 import de.ellpeck.prettypipes.pipe.modules.containers.MainPipeContainer;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.entity.player.PlayerInventory;
@@ -50,6 +51,7 @@ public class PipeTileEntity extends TileEntity implements INamedContainerProvide
         }
     };
     public final List<PipeItem> items = new ArrayList<>();
+    private int priority;
 
     public PipeTileEntity() {
         super(Registry.pipeTileEntity);
@@ -89,7 +91,18 @@ public class PipeTileEntity extends TileEntity implements INamedContainerProvide
         IProfiler profiler = this.world.getProfiler();
 
         profiler.startSection("ticking_modules");
-        this.streamModules().forEach(m -> m.getRight().tick(m.getLeft(), this));
+        int prio = 0;
+        Iterator<Pair<ItemStack, IModule>> modules = this.streamModules().iterator();
+        while (modules.hasNext()) {
+            Pair<ItemStack, IModule> module = modules.next();
+            module.getRight().tick(module.getLeft(), this);
+            prio += module.getRight().getPriority(module.getLeft(), this);
+        }
+        if (prio != this.priority) {
+            this.priority = prio;
+            // clear the cache so that it's reevaluated based on priority
+            PipeNetwork.get(this.world).clearDestinationCache(this.pos);
+        }
         profiler.endSection();
 
         profiler.startSection("ticking_items");
@@ -119,7 +132,7 @@ public class PipeTileEntity extends TileEntity implements INamedContainerProvide
     }
 
     public int getPriority() {
-        return this.streamModules().mapToInt(m -> m.getRight().getPriority(m.getLeft(), this)).max().orElse(0);
+        return this.priority;
     }
 
     public float getItemSpeed() {

src/main/java/de/ellpeck/prettypipes/pipe/modules/LowPriorityModuleItem.java

@@ -0,0 +1,31 @@
+package de.ellpeck.prettypipes.pipe.modules;
+
+import de.ellpeck.prettypipes.items.IModule;
+import de.ellpeck.prettypipes.items.ModuleItem;
+import de.ellpeck.prettypipes.items.ModuleTier;
+import de.ellpeck.prettypipes.pipe.PipeTileEntity;
+import net.minecraft.item.ItemStack;
+
+public class LowPriorityModuleItem extends ModuleItem {
+    private final int priority;
+
+    public LowPriorityModuleItem(String name, ModuleTier tier) {
+        super(name);
+        this.priority = tier.forTier(-50, -100, -200);
+    }
+
+    @Override
+    public int getPriority(ItemStack module, PipeTileEntity tile) {
+        return this.priority;
+    }
+
+    @Override
+    public boolean isCompatible(ItemStack module, PipeTileEntity tile, IModule other) {
+        return !(other instanceof LowPriorityModuleItem);
+    }
+
+    @Override
+    public boolean hasContainer(ItemStack module, PipeTileEntity tile) {
+        return false;
+    }
+}

src/main/resources/assets/prettypipes/lang/en_us.json

@@ -9,9 +9,13 @@
     "item.prettypipes.low_speed_module": "Low Speed Increase Module",
     "item.prettypipes.medium_speed_module": "Medium Speed Increase Module",
     "item.prettypipes.high_speed_module": "High Speed Increase Module",
+    "item.prettypipes.low_low_priority_module": "Low Priority Module",
+    "item.prettypipes.medium_low_priority_module": "Lower Priority Module",
+    "item.prettypipes.high_low_priority_module": "Lowest Priority Module",
     "info.prettypipes.extraction_module": "Pulls items from adjacent inventories\nFilters and pull rates vary by tier",
     "info.prettypipes.filter_module": "Restricts flow from pipes into adjacent inventories\nFilter amount varies by tier",
     "info.prettypipes.speed_module": "Increases speed of items exiting adjacent inventories\nSpeed varies by tier",
+    "info.prettypipes.low_priority_module": "Decreases the reception priority of adjacent inventories\nLower priority means items will prefer other inventories",
     "block.prettypipes.pipe": "Pipe",
     "itemGroup.prettypipes": "Pretty Pipes",
     "container.prettypipes.pipe": "Pipe",

src/main/resources/assets/prettypipes/models/item/high_low_priority_module.json

@@ -0,0 +1,6 @@
+{
+    "parent": "item/generated",
+    "textures": {
+        "layer0": "prettypipes:item/high_low_priority_module"
+    }
+}

src/main/resources/assets/prettypipes/models/item/low_low_priority_module.json

@@ -0,0 +1,6 @@
+{
+    "parent": "item/generated",
+    "textures": {
+        "layer0": "prettypipes:item/low_low_priority_module"
+    }
+}

src/main/resources/assets/prettypipes/models/item/medium_low_priority_module.json

@@ -0,0 +1,6 @@
+{
+    "parent": "item/generated",
+    "textures": {
+        "layer0": "prettypipes:item/medium_low_priority_module"
+    }
+}