Have got text transformations working

frontend/wailsjs/go/main/App.d.ts

@@ -1,4 +1,5 @@
 // Cynhyrchwyd y ffeil hon yn awtomatig. PEIDIWCH Â MODIWL
 // This file is automatically generated. DO NOT EDIT
+import {main} from '../models';
 
-export function Greet(arg1:string):Promise<string>;
+export function ProcessText(arg1:main.ProcessTextRequest):Promise<void>;

frontend/wailsjs/go/main/App.js

@@ -2,6 +2,6 @@
 // Cynhyrchwyd y ffeil hon yn awtomatig. PEIDIWCH Â MODIWL
 // This file is automatically generated. DO NOT EDIT
 
-export function Greet(arg1) {
-  return window['go']['main']['App']['Greet'](arg1);
+export function ProcessText(arg1) {
+  return window['go']['main']['App']['ProcessText'](arg1);
 }

frontend/wailsjs/go/models.ts

@@ -0,0 +1,53 @@
+export namespace main {
+	
+	export class TextSpan {
+	    text: string;
+	    pos: number;
+	    len: number;
+	
+	    static createFrom(source: any = {}) {
+	        return new TextSpan(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.text = source["text"];
+	        this.pos = source["pos"];
+	        this.len = source["len"];
+	    }
+	}
+	export class ProcessTextRequest {
+	    action: string;
+	    input: TextSpan[];
+	
+	    static createFrom(source: any = {}) {
+	        return new ProcessTextRequest(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.action = source["action"];
+	        this.input = this.convertValues(source["input"], TextSpan);
+	    }
+	
+		convertValues(a: any, classs: any, asMap: boolean = false): any {
+		    if (!a) {
+		        return a;
+		    }
+		    if (a.slice && a.map) {
+		        return (a as any[]).map(elem => this.convertValues(elem, classs));
+		    } else if ("object" === typeof a) {
+		        if (asMap) {
+		            for (const key of Object.keys(a)) {
+		                a[key] = new classs(a[key]);
+		            }
+		            return a;
+		        }
+		        return new classs(a);
+		    }
+		    return a;
+		}
+	}
+
+}
+