3 files changed, 49 insertions, 0 deletions
diff --git a/code/frontend/src/models/internal/FormError.ts b/code/frontend/src/models/internal/FormError.ts
new file mode 100644
index 0000000..f6d8978
--- /dev/null
+++ b/code/frontend/src/models/internal/FormError.ts
@@ -0,0 +1,24 @@
+import type { KnownProblem } from "./KnownProblem";
+
+export class FormError {
+    title: string;
+    subtitle: string;
+    constructor(title: string = "", subtitle: string = "") {
+        this.title = title;
+        this.title = subtitle;
+    }
+
+    set(title: string = "", subtitle: string = "") {
+        this.title = title;
+        this.subtitle = subtitle;
+    }
+
+    set_from_known_problem(knownProblem: KnownProblem) {
+        this.title = knownProblem.title ?? "";
+        this.subtitle = knownProblem.subtitle ?? "";
+    }
+
+    has_error() {
+        return this.title?.length > 0 || this.subtitle?.length > 0;
+    }
+}
+\ No newline at end of file
diff --git a/code/frontend/src/models/internal/IForm.ts b/code/frontend/src/models/internal/IForm.ts
new file mode 100644
index 0000000..c14b770
--- /dev/null
+++ b/code/frontend/src/models/internal/IForm.ts
@@ -0,0 +1,15 @@
+import type { FormError } from "./FormError";
+
+export interface IForm {
+    fields: Record<string, IFormField>;
+    error: FormError;
+    get_payload: Function;
+    submit_async: Function;
+    isLoading: boolean;
+    showError: boolean;
+}
+
+export interface IFormField {
+    value: any;
+    errors: Array<string>;
+}
diff --git a/code/frontend/src/models/internal/KnownProblem.ts b/code/frontend/src/models/internal/KnownProblem.ts
new file mode 100644
index 0000000..b6923d9
--- /dev/null
+++ b/code/frontend/src/models/internal/KnownProblem.ts
@@ -0,0 +1,10 @@
+export type KnownProblem = {
+    title: string,
+    subtitle: string,
+    errors: Record<string, string[]>,
+    traceId: string,
+}
+
+export function is_known_problem(response: Response): boolean {
+    return response.headers.has("X-IsKnownProblem");
+}
+\ No newline at end of file