Add script to extract a layer from a theme

scripts/extractLayer.ts

@@ -0,0 +1,53 @@
+import {LayoutConfigJson} from "../Models/ThemeConfig/Json/LayoutConfigJson";
+import {LayerConfigJson} from "../Models/ThemeConfig/Json/LayerConfigJson";
+import {existsSync, mkdirSync, readFileSync, writeFileSync} from "fs";
+
+function main(args: string[]){
+    if(args.length === 0){
+        console.log("Extracts an inline layer from a theme and places it in it's own layer directory.")
+        console.log("USAGE: ts-node scripts/extractLayerFromTheme.ts <themeid> <layerid>")
+        console.log("(Invoke with only the themename to see which layers can be extracted)")
+    }
+    const themeId = args[0]
+    const layerId = args[1]
+
+    const themePath = "./assets/themes/"+themeId+"/"+themeId+".json"
+    const contents = <LayoutConfigJson> JSON.parse(readFileSync(themePath, "UTF-8"))
+    const layers = <LayerConfigJson[]> contents.layers.filter(l => {
+        if(typeof l === "string"){
+            return false
+        }
+        if(l["override"] !== undefined){
+            return false
+        }
+        return true
+    })
+
+    if(layers.length === 0){
+        console.log("No layers can be extracted from this theme. The "+contents.layers.length+" layers are already substituted layers")
+        return
+    }
+
+    const layerConfig = layers.find(l => l.id === layerId)
+    if(layerId === undefined || layerConfig === undefined){
+        if(layerConfig === undefined){
+            console.error( "Layer "+layerId+" not found as inline layer")
+        }
+        console.log("Layers available for extraction are:")
+        console.log(layers.map(l => l.id).join("\n"))
+        return
+    }
+
+
+    const dir = "./assets/layers/"+layerId
+    if(!existsSync(dir)){
+        mkdirSync(dir)
+    }
+    writeFileSync(dir+"/"+layerId+".json", JSON.stringify(layerConfig, null, "  "))
+
+    const index = contents.layers.findIndex(l => l["id"] === layerId)
+    contents.layers[index] = layerId
+    writeFileSync(themePath, JSON.stringify(contents, null, "  "))
+}
+
+main(process.argv.slice(2))