How to Integrate Lovable with Harvest

1// supabase/functions/harvest-proxy/index.ts
2import { serve } from "https://deno.land/std@0.168.0/http/server.ts";
3
4const BASE = "https://api.harvestapp.com/v2";
5const corsHeaders = {
6  "Access-Control-Allow-Origin": "*",
7  "Access-Control-Allow-Headers": "authorization, x-client-info, apikey, content-type",
8};
9
10serve(async (req) => {
11  if (req.method === "OPTIONS") {
12    return new Response("ok", { headers: corsHeaders });
13  }
14  const token = Deno.env.get("HARVEST_ACCESS_TOKEN");
15  const accountId = Deno.env.get("HARVEST_ACCOUNT_ID");
16  if (!token || !accountId) {
17    return new Response(JSON.stringify({ error: "Harvest credentials not configured" }), {
18      status: 500, headers: { ...corsHeaders, "Content-Type": "application/json" },
19    });
20  }
21  const authHeaders = {
22    Authorization: `Bearer ${token}`,
23    "Harvest-Account-ID": accountId,
24    "Content-Type": "application/json",
25  };
26  const { action, params = {} } = await req.json();
27  let resp;
28
29  switch (action) {
30    case "list_clients":
31      resp = await fetch(`${BASE}/clients?per_page=100`, { headers: authHeaders });
32      break;
33    case "list_projects": {
34      const q = new URLSearchParams({ per_page: "100" });
35      if (params.clientId) q.set("client_id", params.clientId);
36      if (params.isActive !== undefined) q.set("is_active", String(params.isActive));
37      resp = await fetch(`${BASE}/projects?${q}`, { headers: authHeaders });
38      break;
39    }
40    case "list_time_entries": {
41      const q = new URLSearchParams({ per_page: "100" });
42      if (params.clientId) q.set("client_id", params.clientId);
43      if (params.projectId) q.set("project_id", params.projectId);
44      if (params.from) q.set("from", params.from);
45      if (params.to) q.set("to", params.to);
46      if (params.isBilled !== undefined) q.set("is_billed", String(params.isBilled));
47      resp = await fetch(`${BASE}/time_entries?${q}`, { headers: authHeaders });
48      break;
49    }
50    case "create_time_entry":
51      resp = await fetch(`${BASE}/time_entries`, {
52        method: "POST", headers: authHeaders,
53        body: JSON.stringify({
54          project_id: params.projectId, task_id: params.taskId,
55          spent_date: params.spentDate, hours: params.hours,
56          notes: params.notes || "",
57        }),
58      });
59      break;
60    case "list_invoices": {
61      const q = new URLSearchParams({ per_page: "100" });
62      if (params.clientId) q.set("client_id", params.clientId);
63      if (params.state) q.set("state", params.state);
64      resp = await fetch(`${BASE}/invoices?${q}`, { headers: authHeaders });
65      break;
66    }
67    case "get_invoice":
68      resp = await fetch(`${BASE}/invoices/${params.invoiceId}`, { headers: authHeaders });
69      break;
70    case "create_invoice":
71      resp = await fetch(`${BASE}/invoices`, {
72        method: "POST", headers: authHeaders,
73        body: JSON.stringify({
74          client_id: params.clientId, subject: params.subject,
75          issue_date: params.issueDate, due_date: params.dueDate,
76          line_items: params.lineItems,
77          notes: params.notes || "",
78        }),
79      });
80      break;
81    case "send_invoice":
82      resp = await fetch(`${BASE}/invoices/${params.invoiceId}/messages`, {
83        method: "POST", headers: authHeaders,
84        body: JSON.stringify({
85          event_type: "send",
86          body: params.body || "Please find your invoice attached.",
87        }),
88      });
89      break;
90    case "list_tasks":
91      resp = await fetch(`${BASE}/tasks?per_page=100`, { headers: authHeaders });
92      break;
93    case "list_expenses": {
94      const q = new URLSearchParams({ per_page: "100" });
95      if (params.clientId) q.set("client_id", params.clientId);
96      if (params.from) q.set("from", params.from);
97      if (params.to) q.set("to", params.to);
98      resp = await fetch(`${BASE}/expenses?${q}`, { headers: authHeaders });
99      break;
100    }
101    default:
102      return new Response(JSON.stringify({ error: `Unknown action: ${action}` }), {
103        status: 400, headers: { ...corsHeaders, "Content-Type": "application/json" },
104      });
105  }
106
107  const data = await resp.json();
108  return new Response(JSON.stringify(data), {
109    status: resp.status, headers: { ...corsHeaders, "Content-Type": "application/json" },
110  });
111});