moving from gitlab

2026-05-15 13:26:54 -04:00
commit 7391c21087
33 changed files with 2539 additions and 0 deletions
@@ -0,0 +1,241 @@
+#include <sqlite3.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+enum ERR { OK, ERROR };
+
+sqlite3 *setupDB();
+enum ERR addTodo(sqlite3 *db);
+enum ERR markComplete(sqlite3 *db);
+enum ERR deleteTodo(sqlite3 *db);
+enum ERR updateTodo(sqlite3 *db);
+enum ERR listAll(sqlite3 *db);
+int numberTodos(sqlite3 *db);
+int completedTodos(sqlite3 *db);
+
+void menu(sqlite3 *db);
+
+int main(int argc, char **argv) {
+
+  sqlite3 *db = setupDB();
+  if (!db) {
+    return 1;
+  }
+
+  menu(db);
+
+  sqlite3_close(db);
+
+  return 0;
+}
+
+sqlite3 *setupDB() {
+  sqlite3 *db;
+  int rc = sqlite3_open("todo.db", &db);
+
+  if (rc != SQLITE_OK) {
+    fprintf(stderr, "Cannot open database %s\n", sqlite3_errmsg(db));
+    return NULL;
+  }
+
+  return db;
+}
+
+void menu(sqlite3 *db) {
+
+  printf("------------------------\n");
+  printf("T E R M I N A L  T O D O\n\n");
+
+  char input;
+  int count, done;
+  while (1) {
+    if ((count = numberTodos(db)) == -1)
+      return;
+    if ((done = completedTodos(db)) == -1)
+      return;
+    printf("You currently have %d Todos.\n", count);
+    printf("You have completed %d Todos!\n\n", done);
+
+    printf("What would you like todo?\n");
+    printf("[A]dd, [L]ist, [C]omplete, [U]pdate, [R]emove, [Q]uit\n");
+    printf("> ");
+    input = getchar();
+    while (getchar() != '\n')
+      ;
+    printf("\n");
+
+    enum ERR err;
+    switch (input) {
+    case 'A':
+    case 'a':
+      if ((err = addTodo(db)) == ERROR)
+        return;
+      break;
+    case 'L':
+    case 'l':
+      if ((err = listAll(db)) == ERROR)
+        return;
+      break;
+    case 'C':
+    case 'c':
+      if ((err = markComplete(db)) == ERROR)
+        return;
+      break;
+    case 'R':
+    case 'r':
+      if ((err = deleteTodo(db)) == ERROR)
+        return;
+      break;
+    case 'U':
+    case 'u':
+      if ((err = updateTodo(db)) == ERROR)
+        return;
+      break;
+    case 'Q':
+    case 'q':
+      printf("Thanks for using the TERMINAL TODO\nGoodbye.\n");
+      return;
+    }
+  }
+}
+
+enum ERR addTodo(sqlite3 *db) {
+  char todo[128];
+  char sql[256];
+  printf("\tenter todo: ");
+  fgets(todo, sizeof(todo), stdin);
+  int loc = strcspn(todo, "\n");
+  todo[loc] = '\0';
+
+  sprintf(sql, "insert into Todos(Id, Title, Completed) values(NULL, '%s', 0);",
+          todo);
+  char *errMsg = 0;
+  int rc = sqlite3_exec(db, sql, 0, 0, &errMsg);
+  if (rc != SQLITE_OK) {
+    fprintf(stderr, "Could not write to DB: %s\n", errMsg);
+    sqlite3_free(errMsg);
+    return ERROR;
+  }
+  return OK;
+}
+
+enum ERR markComplete(sqlite3 *db) {
+  char sql[256], mark[4];
+  char *errMsg = 0;
+
+  printf("\tenter id to mark complete: ");
+  fgets(mark, sizeof(mark), stdin);
+  int id = atoi(mark);
+  sprintf(sql, "update Todos set Completed=1 where id=%d;", id);
+
+  int rc = sqlite3_exec(db, sql, 0, 0, &errMsg);
+  if (rc != SQLITE_OK) {
+    fprintf(stderr, "Could not Complete TODO: %s\n", errMsg);
+    sqlite3_free(errMsg);
+    return ERROR;
+  }
+  return OK;
+}
+
+enum ERR deleteTodo(sqlite3 *db) {
+  char sql[256], mark[4];
+  char *errMsg;
+
+  printf("\tenter id to delete: ");
+  fgets(mark, sizeof(mark), stdin);
+  int id = atoi(mark);
+  sprintf(sql, "delete from Todos where id=%d;", id);
+
+  int rc = sqlite3_exec(db, sql, 0, 0, &errMsg);
+  if (rc != SQLITE_OK) {
+    fprintf(stderr, "Could not delete: %s\n", errMsg);
+    sqlite3_free(errMsg);
+    return ERROR;
+  }
+
+  return OK;
+}
+
+enum ERR updateTodo(sqlite3 *db) {
+  char sql[256], mark[4], todo[128];
+  char *errMsg;
+  printf("\tenter id to edit: ");
+  fgets(mark, sizeof(mark), stdin);
+  int id = atoi(mark);
+
+  printf("\tenter new title for Todo: ");
+  fgets(todo, sizeof(todo), stdin);
+  todo[strcspn(todo, "\n")] = '\0';
+
+  sprintf(sql, "update Todos set Title='%s' where Id=%d;", todo, id);
+
+  int rc = sqlite3_exec(db, sql, 0, 0, &errMsg);
+  if (rc != SQLITE_OK) {
+    fprintf(stderr, "Could not update Todo: %s\n", errMsg);
+    sqlite3_free(errMsg);
+    return ERROR;
+  }
+  return OK;
+}
+
+enum ERR listAll(sqlite3 *db) {
+  sqlite3_stmt *stmt;
+  const char *sql = "select * from Todos;";
+  int rc = sqlite3_prepare_v2(db, sql, -1, &stmt, NULL);
+  if (rc != SQLITE_OK) {
+    fprintf(stderr, "Could not read DB: %s\n", sqlite3_errmsg(db));
+    return ERROR;
+  }
+  printf("%-5s%-25s%s\n", "Id", "Todo", "Completed");
+  printf("------------------------------------------------\n");
+
+  while ((rc = sqlite3_step(stmt)) == SQLITE_ROW) {
+    int id = sqlite3_column_int(stmt, 0);
+    char *todo = (char *)sqlite3_column_text(stmt, 1);
+    if (!todo) {
+      todo = "NULL";
+    }
+    int completed = sqlite3_column_int(stmt, 2);
+    char *done = "done";
+    if (!completed) {
+      done = "not";
+    }
+    printf("%-5d%-25s%s\n", id, todo, done);
+    printf("------------------------------------------------\n");
+  }
+  return OK;
+}
+
+int numberTodos(sqlite3 *db) {
+  int count = 0;
+  sqlite3_stmt *stmt;
+  const char *sql = "select count(*) from Todos;";
+  int rc = sqlite3_prepare_v2(db, sql, -1, &stmt, NULL);
+  if (rc != SQLITE_OK) {
+    fprintf(stderr, "Could not get count from db: %s\n", sqlite3_errmsg(db));
+    return -1;
+  }
+  while ((rc = sqlite3_step(stmt)) != SQLITE_DONE) {
+    count = sqlite3_column_int(stmt, 0);
+  }
+  return count;
+}
+
+int completedTodos(sqlite3 *db) {
+  int count = 0;
+  sqlite3_stmt *stmt;
+  const char *sql = "select * from Todos where Completed=1;";
+  int rc = sqlite3_prepare_v2(db, sql, -1, &stmt, NULL);
+  if (rc != SQLITE_OK) {
+    fprintf(stderr, "could not get number of complete todos: %s\n",
+            sqlite3_errmsg(db));
+    return -1;
+  }
+
+  while ((rc = sqlite3_step(stmt)) != SQLITE_DONE) {
+    count++;
+  }
+
+  return count;
+}