feat: finish the docker plugin (B15)

plugins/docker/src/backend/host-settings.ts

@@ -0,0 +1,70 @@
+import type { PluginContext } from "@termix/plugin-sdk/backend";
+import {
+  normalizeContainerRuntime,
+  type ContainerRuntime,
+} from "./container-runtime.js";
+
+export const PLUGIN_ID = "docker";
+
+export interface DockerHostSettings {
+  enabled: boolean;
+  runtime: ContainerRuntime;
+}
+
+export async function readDockerHostSettings(
+  ctx: PluginContext,
+  hostId: number,
+): Promise<DockerHostSettings> {
+  const values = await ctx.settings.getAll("host", hostId);
+  return {
+    enabled: values.enableDocker === true,
+    runtime: normalizeContainerRuntime(values.containerRuntime),
+  };
+}
+
+function asObject(value: unknown): Record<string, unknown> | undefined {
+  let parsed = value;
+  if (typeof value === "string") {
+    try {
+      parsed = JSON.parse(value);
+    } catch {
+      return undefined;
+    }
+  }
+  return parsed && typeof parsed === "object" && !Array.isArray(parsed)
+    ? (parsed as Record<string, unknown>)
+    : undefined;
+}
+
+function asBool(value: unknown): boolean | undefined {
+  if (typeof value === "boolean") return value;
+  if (value === 1 || value === "1" || value === "true") return true;
+  if (value === 0 || value === "0" || value === "false") return false;
+  return undefined;
+}
+
+/**
+ * The docker host settings in an imported or created host row: the nested
+ * `pluginSettings.docker` of a Termix export first, then the flat
+ * `enableDocker` and `dockerConfig.runtime` hosts had before 2.9.0 (older
+ * exports, proxmox guests marked as Docker hosts).
+ */
+export function normalizeImportedHost(
+  raw: Record<string, unknown>,
+): Record<string, unknown> | null {
+  const nested = asObject(asObject(raw.pluginSettings)?.[PLUGIN_ID]) ?? {};
+  const out: Record<string, unknown> = {};
+
+  const enabled = asBool(
+    nested.enableDocker !== undefined ? nested.enableDocker : raw.enableDocker,
+  );
+  if (enabled !== undefined) out.enableDocker = enabled;
+
+  const runtime =
+    nested.containerRuntime ?? asObject(raw.dockerConfig)?.runtime;
+  if (runtime === "docker" || runtime === "podman") {
+    out.containerRuntime = runtime;
+  }
+
+  return Object.keys(out).length > 0 ? out : null;
+}