Playtime: Add a simple Playtime main preset for generic grid controllers

resources/main-presets/factory/generic/grid/playtime.preset.luau

@@ -0,0 +1,70 @@
+--- name: Generic grid controller - Playtime
+--- realearn_version: 2.16.0-pre.8
+--- author: helgoboss
+--- description: |
+---     This main preset turns any grid-like controller into a device for doing very basic clip launching via Playtime.
+---
+---     This generic preset is intended to be used as fallback if no device-specific preset exists. It lacks features because it can't take advantage
+---     of device-specific features.
+--- used_schemes: [grid]
+--- required_features: [playtime]
+
+--!strict
+
+-- Configuration
+
+-- Requires
+
+local realearn = require("realearn")
+
+-- Constants
+
+-- TODO This should be parameterized from the controller preset. One more reason to allow script parameterization :)
+
+local column_count = 4
+local row_count = 4
+
+-- Mappings
+
+local mappings = {}
+
+-- For each slot
+for col = 0, column_count - 1 do
+    for row = 0, row_count - 1 do
+        local mapping = realearn.Mapping {
+            name = `Trigger slot {col + 1}/{row + 1}`,
+            source = realearn.Source.Virtual {
+                character = "Button",
+                id = `col{col + 1}/row{row + 1}/pad`,
+            },
+            glue = {
+                feedback = realearn.Feedback.Text {
+                    text_expression = "{{ target.slot_state.id }}",
+                    color = realearn.VirtualColor {
+                        prop = "target.slot.color",
+                    },
+                },
+            },
+            target = realearn.Target.PlaytimeSlotTransportAction {
+                slot = realearn.PlaytimeSlotDescriptor.Dynamic {
+                    column_expression = `control_unit_column_index + {col}`,
+                    row_expression = `control_unit_row_index + {row}`,
+                },
+                action = "Trigger",
+            },
+        }
+        table.insert(mappings, mapping)
+    end
+end
+
+return realearn.Compartment {
+    mappings = mappings :: any,
+    custom_data = {
+        playtime = {
+            control_unit = {
+                column_count = column_count,
+                row_count = row_count,
+            },
+        },
+    },
+}