Claude opus authored everything to make the user and task work. First iteration

Provider/main/api/tasks/add.cpp

@@ -0,0 +1,76 @@
+// POST /api/tasks — Create a new task
+// Body: {"user_id":1, "title":"...", "due_date":1741369200}
+
+#include "cJSON.h"
+#include "esp_http_server.h"
+
+#include "todo.hpp"
+#include "types.hpp"
+
+internal esp_err_t api_tasks_post_handler(httpd_req_t *req)
+{
+  httpd_resp_set_type(req, "application/json");
+  httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
+
+  char buf[256];
+  int received = httpd_req_recv(req, buf, sizeof(buf) - 1);
+  if (received <= 0)
+  {
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Empty body");
+    return ESP_FAIL;
+  }
+  buf[received] = '\0';
+
+  cJSON *body = cJSON_Parse(buf);
+  if (!body)
+  {
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Invalid JSON");
+    return ESP_FAIL;
+  }
+
+  cJSON *user_id_item = cJSON_GetObjectItem(body, "user_id");
+  cJSON *title_item = cJSON_GetObjectItem(body, "title");
+  cJSON *due_date_item = cJSON_GetObjectItem(body, "due_date");
+
+  if (!cJSON_IsNumber(user_id_item) || !cJSON_IsString(title_item) ||
+      !cJSON_IsNumber(due_date_item))
+  {
+    cJSON_Delete(body);
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST,
+                        "Missing user_id, title, or due_date");
+    return ESP_FAIL;
+  }
+
+  task_t *task =
+      add_task((uint8)user_id_item->valueint, title_item->valuestring,
+               (int64)due_date_item->valuedouble);
+  cJSON_Delete(body);
+
+  if (!task)
+  {
+    httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR,
+                        "Task limit reached or invalid user");
+    return ESP_FAIL;
+  }
+
+  cJSON *resp = cJSON_CreateObject();
+  cJSON_AddNumberToObject(resp, "id", task->id);
+  cJSON_AddNumberToObject(resp, "user_id", task->user_id);
+  cJSON_AddStringToObject(resp, "title", task->title);
+  cJSON_AddNumberToObject(resp, "due_date", (double)task->due_date);
+  cJSON_AddBoolToObject(resp, "completed", task->completed);
+
+  const char *json = cJSON_PrintUnformatted(resp);
+  httpd_resp_sendstr(req, json);
+
+  free((void *)json);
+  cJSON_Delete(resp);
+
+  return ESP_OK;
+}
+
+internal const httpd_uri_t api_tasks_post_uri = {.uri = "/api/tasks",
+                                                 .method = HTTP_POST,
+                                                 .handler =
+                                                     api_tasks_post_handler,
+                                                 .user_ctx = NULL};

Provider/main/api/tasks/list.cpp

@@ -0,0 +1,62 @@
+// GET /api/tasks?user_id=N — List tasks for a specific user
+
+#include "cJSON.h"
+#include "esp_http_server.h"
+
+#include "todo.hpp"
+#include "types.hpp"
+
+internal esp_err_t api_tasks_get_handler(httpd_req_t *req)
+{
+  httpd_resp_set_type(req, "application/json");
+  httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
+
+  char query[64] = {};
+  if (httpd_req_get_url_query_str(req, query, sizeof(query)) != ESP_OK)
+  {
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST,
+                        "Missing query param 'user_id'");
+    return ESP_FAIL;
+  }
+
+  char user_id_str[8] = {};
+  if (httpd_query_key_value(query, "user_id", user_id_str,
+                            sizeof(user_id_str)) != ESP_OK)
+  {
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST,
+                        "Missing query param 'user_id'");
+    return ESP_FAIL;
+  }
+
+  uint8 user_id = (uint8)atoi(user_id_str);
+
+  cJSON *arr = cJSON_CreateArray();
+
+  for (int i = 0; i < MAX_TASKS; i++)
+  {
+    if (g_Tasks[i].active && g_Tasks[i].user_id == user_id)
+    {
+      cJSON *obj = cJSON_CreateObject();
+      cJSON_AddNumberToObject(obj, "id", g_Tasks[i].id);
+      cJSON_AddNumberToObject(obj, "user_id", g_Tasks[i].user_id);
+      cJSON_AddStringToObject(obj, "title", g_Tasks[i].title);
+      cJSON_AddNumberToObject(obj, "due_date", (double)g_Tasks[i].due_date);
+      cJSON_AddBoolToObject(obj, "completed", g_Tasks[i].completed);
+      cJSON_AddItemToArray(arr, obj);
+    }
+  }
+
+  const char *json = cJSON_PrintUnformatted(arr);
+  httpd_resp_sendstr(req, json);
+
+  free((void *)json);
+  cJSON_Delete(arr);
+
+  return ESP_OK;
+}
+
+internal const httpd_uri_t api_tasks_get_uri = {.uri = "/api/tasks",
+                                                .method = HTTP_GET,
+                                                .handler =
+                                                    api_tasks_get_handler,
+                                                .user_ctx = NULL};

Provider/main/api/tasks/remove.cpp

@@ -0,0 +1,42 @@
+// DELETE /api/tasks?id=N — Delete a task
+
+#include "esp_http_server.h"
+
+#include "types.hpp"
+
+internal esp_err_t api_tasks_delete_handler(httpd_req_t *req)
+{
+  httpd_resp_set_type(req, "application/json");
+  httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
+
+  char query[32] = {};
+  if (httpd_req_get_url_query_str(req, query, sizeof(query)) != ESP_OK)
+  {
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Missing query param 'id'");
+    return ESP_FAIL;
+  }
+
+  char id_str[8] = {};
+  if (httpd_query_key_value(query, "id", id_str, sizeof(id_str)) != ESP_OK)
+  {
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Missing query param 'id'");
+    return ESP_FAIL;
+  }
+
+  uint16 id = (uint16)atoi(id_str);
+
+  if (!remove_task(id))
+  {
+    httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, "Task not found");
+    return ESP_FAIL;
+  }
+
+  httpd_resp_sendstr(req, "{\"status\":\"ok\"}");
+  return ESP_OK;
+}
+
+internal const httpd_uri_t api_tasks_delete_uri = {.uri = "/api/tasks",
+                                                   .method = HTTP_DELETE,
+                                                   .handler =
+                                                       api_tasks_delete_handler,
+                                                   .user_ctx = NULL};

Provider/main/api/tasks/store.cpp

@@ -0,0 +1,111 @@
+// Task data store: CRUD helpers, sorting, and seed data
+
+#include "esp_timer.h"
+
+#include "api/tasks/store.hpp"
+#include "api/users/store.hpp"
+
+// Find a task by ID, returns nullptr if not found
+internal task_t *find_task(uint16 id)
+{
+  for (int i = 0; i < MAX_TASKS; i++)
+  {
+    if (g_Tasks[i].active && g_Tasks[i].id == id)
+    {
+      return &g_Tasks[i];
+    }
+  }
+  return nullptr;
+}
+
+// Add a task, returns pointer to new task or nullptr if full
+internal task_t *add_task(uint8 user_id, const char *title, int64 due_date)
+{
+  // Verify user exists
+  if (find_user(user_id) == nullptr)
+  {
+    return nullptr;
+  }
+
+  for (int i = 0; i < MAX_TASKS; i++)
+  {
+    if (!g_Tasks[i].active)
+    {
+      g_Tasks[i].id = g_NextTaskId++;
+      g_Tasks[i].user_id = user_id;
+      strlcpy(g_Tasks[i].title, title, sizeof(g_Tasks[i].title));
+      g_Tasks[i].due_date = due_date;
+      g_Tasks[i].completed = false;
+      g_Tasks[i].active = true;
+      return &g_Tasks[i];
+    }
+  }
+  return nullptr;
+}
+
+// Remove a task by ID, returns true if found and removed
+internal bool remove_task(uint16 id)
+{
+  for (int i = 0; i < MAX_TASKS; i++)
+  {
+    if (g_Tasks[i].active && g_Tasks[i].id == id)
+    {
+      g_Tasks[i].active = false;
+      g_Tasks[i].id = 0;
+      return true;
+    }
+  }
+  return false;
+}
+
+// Remove all tasks belonging to a user
+internal void remove_tasks_for_user(uint8 user_id)
+{
+  for (int i = 0; i < MAX_TASKS; i++)
+  {
+    if (g_Tasks[i].active && g_Tasks[i].user_id == user_id)
+    {
+      g_Tasks[i].active = false;
+      g_Tasks[i].id = 0;
+    }
+  }
+}
+
+// Simple insertion sort for small arrays — sort task pointers by due_date
+// ascending
+internal void sort_tasks_by_due_date(task_t **arr, int count)
+{
+  for (int i = 1; i < count; i++)
+  {
+    task_t *key = arr[i];
+    int j = i - 1;
+    while (j >= 0 && arr[j]->due_date > key->due_date)
+    {
+      arr[j + 1] = arr[j];
+      j--;
+    }
+    arr[j + 1] = key;
+  }
+}
+
+// Populate dummy tasks on boot for development iteration.
+// Uses relative offsets from current time so due dates always make sense.
+internal void seed_tasks()
+{
+  int64 now = (int64)(esp_timer_get_time() / 1000000);
+
+  // Alice's tasks (user_id = 1)
+  add_task(1, "Buy groceries", now + 86400);             // +1 day
+  add_task(1, "Review PR #42", now + 3600);              // +1 hour
+  add_task(1, "Book dentist appointment", now + 172800); // +2 days
+  add_task(1, "Update resume", now + 604800);            // +7 days
+
+  // Bob's tasks (user_id = 2)
+  add_task(2, "Fix login bug", now + 7200);      // +2 hours
+  add_task(2, "Deploy staging", now + 43200);    // +12 hours
+  add_task(2, "Write unit tests", now + 259200); // +3 days
+
+  // Charlie's tasks (user_id = 3)
+  add_task(3, "Water plants", now + 1800);  // +30 min
+  add_task(3, "Call plumber", now + 86400); // +1 day
+}

Provider/main/api/tasks/store.hpp

@@ -0,0 +1,12 @@
+#pragma once
+
+#include "todo.hpp"
+#include "types.hpp"
+
+// Data store operations for tasks
+internal task_t *find_task(uint16 id);
+internal task_t *add_task(uint8 user_id, const char *title, int64 due_date);
+internal bool remove_task(uint16 id);
+internal void remove_tasks_for_user(uint8 user_id);
+internal void sort_tasks_by_due_date(task_t **arr, int count);
+internal void seed_tasks();

Provider/main/api/tasks/unity.cpp

@@ -0,0 +1,8 @@
+// clang-format off
+#include "api/tasks/store.cpp"
+#include "api/tasks/add.cpp"
+#include "api/tasks/list.cpp"
+#include "api/tasks/remove.cpp"
+#include "api/tasks/upcoming.cpp"
+#include "api/tasks/update.cpp"
+// clang-format on

Provider/main/api/tasks/upcoming.cpp

@@ -0,0 +1,72 @@
+// GET /api/tasks/upcoming — Top 3 upcoming tasks per user (for Dashboard)
+
+#include "cJSON.h"
+#include "esp_http_server.h"
+
+#include "todo.hpp"
+#include "types.hpp"
+
+internal esp_err_t api_tasks_upcoming_handler(httpd_req_t *req)
+{
+  httpd_resp_set_type(req, "application/json");
+  httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
+
+  cJSON *root = cJSON_CreateObject();
+  cJSON *users_arr = cJSON_AddArrayToObject(root, "users");
+
+  for (int u = 0; u < MAX_USERS; u++)
+  {
+    if (!g_Users[u].active)
+      continue;
+
+    // Collect incomplete tasks for this user
+    task_t *user_tasks[MAX_TASKS];
+    int count = 0;
+
+    for (int t = 0; t < MAX_TASKS; t++)
+    {
+      if (g_Tasks[t].active && g_Tasks[t].user_id == g_Users[u].id &&
+          !g_Tasks[t].completed)
+      {
+        user_tasks[count++] = &g_Tasks[t];
+      }
+    }
+
+    // Sort by due_date ascending
+    sort_tasks_by_due_date(user_tasks, count);
+
+    // Build user object with top 3
+    cJSON *user_obj = cJSON_CreateObject();
+    cJSON_AddNumberToObject(user_obj, "id", g_Users[u].id);
+    cJSON_AddStringToObject(user_obj, "name", g_Users[u].name);
+
+    cJSON *tasks_arr = cJSON_AddArrayToObject(user_obj, "tasks");
+    int limit = count < 3 ? count : 3;
+    for (int i = 0; i < limit; i++)
+    {
+      cJSON *t_obj = cJSON_CreateObject();
+      cJSON_AddNumberToObject(t_obj, "id", user_tasks[i]->id);
+      cJSON_AddStringToObject(t_obj, "title", user_tasks[i]->title);
+      cJSON_AddNumberToObject(t_obj, "due_date",
+                              (double)user_tasks[i]->due_date);
+      cJSON_AddBoolToObject(t_obj, "completed", user_tasks[i]->completed);
+      cJSON_AddItemToArray(tasks_arr, t_obj);
+    }
+
+    cJSON_AddItemToArray(users_arr, user_obj);
+  }
+
+  const char *json = cJSON_PrintUnformatted(root);
+  httpd_resp_sendstr(req, json);
+
+  free((void *)json);
+  cJSON_Delete(root);
+
+  return ESP_OK;
+}
+
+internal const httpd_uri_t api_tasks_upcoming_uri = {
+    .uri = "/api/tasks/upcoming",
+    .method = HTTP_GET,
+    .handler = api_tasks_upcoming_handler,
+    .user_ctx = NULL};

Provider/main/api/tasks/update.cpp

@@ -0,0 +1,77 @@
+// POST /api/tasks/update — Modify a task
+// Body: {"id":1, "title":"...", "due_date":..., "completed":true}
+// All fields except "id" are optional
+
+#include "cJSON.h"
+#include "esp_http_server.h"
+
+#include "todo.hpp"
+#include "types.hpp"
+
+internal esp_err_t api_tasks_update_handler(httpd_req_t *req)
+{
+  httpd_resp_set_type(req, "application/json");
+  httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
+
+  char buf[256];
+  int received = httpd_req_recv(req, buf, sizeof(buf) - 1);
+  if (received <= 0)
+  {
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Empty body");
+    return ESP_FAIL;
+  }
+  buf[received] = '\0';
+
+  cJSON *body = cJSON_Parse(buf);
+  if (!body)
+  {
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Invalid JSON");
+    return ESP_FAIL;
+  }
+
+  cJSON *id_item = cJSON_GetObjectItem(body, "id");
+  if (!cJSON_IsNumber(id_item))
+  {
+    cJSON_Delete(body);
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Missing 'id'");
+    return ESP_FAIL;
+  }
+
+  task_t *task = find_task((uint16)id_item->valueint);
+  if (!task)
+  {
+    cJSON_Delete(body);
+    httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, "Task not found");
+    return ESP_FAIL;
+  }
+
+  // Update fields if present
+  cJSON *title_item = cJSON_GetObjectItem(body, "title");
+  if (cJSON_IsString(title_item))
+  {
+    strlcpy(task->title, title_item->valuestring, sizeof(task->title));
+  }
+
+  cJSON *due_date_item = cJSON_GetObjectItem(body, "due_date");
+  if (cJSON_IsNumber(due_date_item))
+  {
+    task->due_date = (int64)due_date_item->valuedouble;
+  }
+
+  cJSON *completed_item = cJSON_GetObjectItem(body, "completed");
+  if (cJSON_IsBool(completed_item))
+  {
+    task->completed = cJSON_IsTrue(completed_item);
+  }
+
+  cJSON_Delete(body);
+
+  httpd_resp_sendstr(req, "{\"status\":\"ok\"}");
+  return ESP_OK;
+}
+
+internal const httpd_uri_t api_tasks_update_uri = {.uri = "/api/tasks/update",
+                                                   .method = HTTP_POST,
+                                                   .handler =
+                                                       api_tasks_update_handler,
+                                                   .user_ctx = NULL};