feat: initial working version of project manager

app/src/lib/project-manager/ProjectManager.svelte

@@ -0,0 +1,85 @@
+<script lang="ts">
+  import type { Graph } from "$lib/types";
+  import { defaultPlant } from "$lib/graph-templates";
+  import type { ProjectManager } from "./project-manager.svelte";
+
+  const { projectManager } = $props<{ projectManager: ProjectManager }>();
+
+  let showNewProject = $state(false);
+  let newProjectName = $state("");
+
+  function handleCreate() {
+    projectManager.handleCreateProject(
+      defaultPlant as unknown as Graph,
+      newProjectName,
+    );
+    newProjectName = "";
+    showNewProject = false;
+  }
+</script>
+
+<header
+  class="flex justify-between px-4 h-[70px] border-b-1 border-[var(--outline)] items-center"
+>
+  <h3>Project</h3>
+  <button
+    class="px-3 py-1 bg-[var(--layer-0)] rounded"
+    onclick={() => (showNewProject = !showNewProject)}
+  >
+    New
+  </button>
+</header>
+
+{#if showNewProject}
+  <div
+    class="flex justify-between px-4 h-[70px] border-b-1 border-[var(--outline)] items-center gap-2"
+  >
+    <input
+      type="text"
+      bind:value={newProjectName}
+      placeholder="Project name"
+      class="flex-1 min-w-0 px-2 py-2 bg-gray-800 border border-gray-700 rounded"
+      onkeydown={(e) => e.key === "Enter" && handleCreate()}
+    />
+    <button class="cursor-pointer" onclick={() => handleCreate()}>
+      Create
+    </button>
+  </div>
+{/if}
+
+<div class="p-4 text-white min-h-screen">
+  {#if projectManager.loading}
+    <p>Loading...</p>
+  {/if}
+
+  <ul class="space-y-2">
+    {#each projectManager.projects as project (project.id)}
+      <li>
+        <div
+          class="w-full text-left px-3 py-2 rounded cursor-pointer {projectManager
+            .activeProjectId.value === project.id
+            ? 'bg-blue-600'
+            : 'bg-gray-800 hover:bg-gray-700'}"
+          onclick={() => projectManager.handleSelectProject(project.id!)}
+          role="button"
+          tabindex="0"
+          onkeydown={(e) =>
+            e.key === "Enter" &&
+            projectManager.handleSelectProject(project.id!)}
+        >
+          <div class="flex justify-between items-center">
+            <span>{project.meta?.title || "Untitled"}</span>
+            <button
+              class="text-red-400 hover:text-red-300"
+              onclick={() => {
+                projectManager.handleDeleteProject(project.id!);
+              }}
+            >
+              ×
+            </button>
+          </div>
+        </div>
+      </li>
+    {/each}
+  </ul>
+</div>

app/src/lib/project-manager/project-database.svelte.ts

@@ -0,0 +1,54 @@
+import type { Graph } from '@nodarium/types';
+import { type IDBPDatabase, openDB } from 'idb';
+
+export interface GraphDatabase {
+  projects: Graph;
+}
+
+const DB_NAME = 'nodarium-graphs';
+const DB_VERSION = 1;
+const STORE_NAME = 'graphs';
+
+let dbPromise: Promise<IDBPDatabase<GraphDatabase>> | null = null;
+
+export function getDB() {
+  if (!dbPromise) {
+    dbPromise = openDB<GraphDatabase>(DB_NAME, DB_VERSION, {
+      upgrade(db) {
+        if (!db.objectStoreNames.contains(STORE_NAME)) {
+          db.createObjectStore(STORE_NAME, { keyPath: 'id' });
+        }
+      }
+    });
+  }
+  return dbPromise;
+}
+
+export async function getGraph(id: number): Promise<Graph | undefined> {
+  const db = await getDB();
+  return db.get(STORE_NAME, id);
+}
+
+export async function saveGraph(graph: Graph): Promise<Graph> {
+  const db = await getDB();
+  graph.meta = { ...graph.meta, lastModified: new Date().toISOString() };
+  console.log('SAVING GRAPH', { graph });
+  await db.put(STORE_NAME, graph);
+  return graph;
+}
+
+export async function deleteGraph(id: number): Promise<void> {
+  const db = await getDB();
+  await db.delete(STORE_NAME, id);
+  console.log('DELETE GRAPH', { id });
+}
+
+export async function getGraphs(): Promise<Graph[]> {
+  const db = await getDB();
+  return db.getAll(STORE_NAME);
+}
+
+export async function clear(): Promise<void> {
+  const db = await getDB();
+  return db.clear(STORE_NAME);
+}

app/src/lib/project-manager/project-manager.svelte.ts

@@ -0,0 +1,93 @@
+import * as templates from '$lib/graph-templates';
+import { localState } from '$lib/helpers/localState.svelte';
+import type { Graph } from '@nodarium/types';
+import * as db from './project-database.svelte';
+
+export class ProjectManager {
+  public graph = $state<Graph>();
+  private projects = $state<Graph[]>([]);
+  private activeProjectId = localState<number | undefined>(
+    'node.activeProjectId',
+    undefined
+  );
+  public readonly loading = $derived(this.graph?.id !== this.activeProjectId.value);
+
+  constructor() {
+    this.init();
+  }
+
+  async saveGraph(g: Graph) {
+    db.saveGraph(g);
+  }
+
+  private async init() {
+    await db.getDB();
+    this.projects = await db.getGraphs();
+
+    console.log('PM: INIT', {
+      projects: this.projects,
+      activeProjectId: this.activeProjectId.value
+    });
+
+    if (this.activeProjectId.value !== undefined) {
+      let loadedGraph = await db.getGraph(this.activeProjectId.value);
+      console.log('PM: LOAD ACTIVE PROJECT', { loadedGraph });
+      if (loadedGraph) {
+        console.log('Load active project');
+        this.graph = loadedGraph;
+      }
+    }
+
+    if (!this.graph) {
+      console.log('Load first active project', { projectsAmount: this.projects.length });
+      if (this.projects?.length && this.projects[0]?.id !== undefined) {
+        this.graph = this.projects[0];
+        this.activeProjectId.value = this.graph.id;
+      }
+    }
+
+    if (!this.graph) {
+      console.log('Create default project');
+      this.handleCreateProject();
+    }
+  }
+
+  public handleCreateProject(
+    g: Graph = templates.defaultPlant as unknown as Graph,
+    title: string = 'New Project'
+  ) {
+    let id = g?.id || 0;
+    while (this.projects.find((p) => p.id === id)) {
+      id++;
+    }
+
+    console.log('CREATE PROJECT', { id, title });
+
+    g.id = id;
+    if (!g.meta) g.meta = {};
+    if (!g.meta.title) g.meta.title = title;
+
+    db.saveGraph(g);
+    this.projects = [...this.projects, g];
+    this.handleSelectProject(id);
+  }
+
+  public async handleDeleteProject(projectId: number) {
+    await db.deleteGraph(projectId);
+    if (this.projects.length === 1) {
+      this.graph = undefined;
+      this.projects = [];
+    } else {
+      this.projects = this.projects.filter((p) => p.id !== projectId);
+      this.handleSelectProject(this.projects[0].id);
+    }
+  }
+
+  public async handleSelectProject(id: number) {
+    if (this.activeProjectId.value !== id) {
+      const project = await db.getGraph(id);
+      this.graph = project;
+      this.activeProjectId.value = id;
+    }
+  }
+}