Canvas: Organize back and front components

Change-Id: I0f2c0bbe47b2693127a367a72321b24eb1af7796
diff --git a/apps/canvas/back/index.ts b/apps/canvas/back/index.ts
new file mode 100644
index 0000000..b103756
--- /dev/null
+++ b/apps/canvas/back/index.ts
@@ -0,0 +1,158 @@
+import { PrismaClient } from "@prisma/client";
+import express, { response } from "express";
+import { env } from "node:process";
+import axios from "axios";
+
+const db = new PrismaClient();
+
+const handleProjectCreate: express.Handler = async (req, resp) => {
+    try {
+        const { id } = await db.project.create({
+            data: {
+                userId: "gio", // req.get("x-forwarded-userid")!,
+                name: req.body.name,
+            },
+        });
+        resp.status(200);
+        resp.header("Content-Type", "application/json");
+        resp.write(JSON.stringify({
+            id,
+        }))
+    } catch (e) {
+        console.log(e);
+        resp.status(500);
+    } finally {
+        resp.end();
+    }
+};
+
+const handleProjectAll: express.Handler = async (req, resp) => {
+    try {
+        const r = await db.project.findMany({
+            where: {
+                userId: "gio", // req.get("x-forwarded-userid")!,
+            },
+        });
+        resp.status(200);
+        resp.header("Content-Type", "application/json");
+        resp.write(JSON.stringify(r.map((p) => ({
+            id: p.id.toString(),
+            name: p.name,
+        }))))
+    } catch (e) {
+        console.log(e);
+        resp.status(500);
+    } finally {
+        resp.end();
+    }
+};
+
+const handleSave: express.Handler = async (req, resp) => {
+    try {
+        await db.project.update({
+            where: {
+                id: Number(req.params["projectId"]),
+            },
+            data: {
+                draft: Buffer.from(JSON.stringify(req.body)),
+            },
+        });
+        resp.status(200);
+    } catch (e) {
+        console.log(e);
+        resp.status(500)
+    } finally {
+        resp.end();
+    }
+};
+
+const handleSavedGet: express.Handler = async (req, resp) => {
+    try {
+        const r = await db.project.findUnique({
+            where: {
+                id: Number(req.params["projectId"]),
+            },
+            select: {
+                state: true,
+                draft: true,
+            }
+        });
+        if (r == null) {
+            resp.status(404);
+        } else {
+            resp.status(200);
+            resp.header("content-type", "application/json");
+            console.log(r);
+            if (r.draft == null) {
+                if (r.state == null) {
+                    resp.send({
+                        nodes: [], 
+                        edges: [],
+                        viewport: { x: 0, y: 0, zoom: 1},
+                    });    
+                } else {
+                    resp.send(JSON.parse(r.state.toString()));
+                }
+            } else {
+                resp.send(JSON.parse(Buffer.from(r.state!).toString("utf8")));
+            }
+        }
+    } catch (e) {
+        console.log(e);
+        resp.status(500);
+    } finally {
+        resp.end();
+    }
+};
+
+const handleDeploy: express.Handler = async (req, resp) => {
+    try {
+        console.log(req.params);
+        const state = Buffer.from(JSON.stringify(req.body.state));
+        await db.project.update({
+            where: {
+                id: Number(req.params["projectId"]),
+            },
+            data: {
+                draft: state,
+            },
+        });
+        const r = await axios.post("http://appmanager.hgrz-appmanager.svc.cluster.local/api/dodo-app", { config: req.body.config });
+        if (r.status === 200) {
+            const d = r.data as { id: string, deployKey: string };
+            await db.project.update({
+                where: {
+                    id: Number(req.params["projectId"]),
+                },
+                data: {
+                    state,
+                    draft: null,
+                    instanceId: d.id,
+                    deployKey: d.deployKey,
+                },
+            });
+        }
+    } catch (e) {
+        console.log(e);
+        resp.status(500);
+    } finally {
+        resp.end();
+    }
+};
+
+async function start() {
+    await db.$connect();
+    const app = express();
+    app.use(express.json());
+    app.post("/api/project/:projectId/saved", handleSave);
+    app.get("/api/project/:projectId/saved", handleSavedGet);
+    app.post("/api/project/:projectId/deploy", handleDeploy);
+    app.get("/api/project", handleProjectAll);
+    app.post("/api/project", handleProjectCreate);
+    app.use("/", express.static("../front/dist"));
+    app.listen(env.DODO_PORT_WEB, () => {
+        console.log("started");
+    });
+}
+
+start();
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