Add info command.

src/arg_parse.hpp

@@ -27,6 +27,7 @@ enum cmd_id {
 	CMD_ADD,
 	CMD_LIST,
 	CMD_DEL,
+	CMD_INFO,
 	CMD_HELP,
 	CMD_VERSION,
 };
@@ -35,6 +36,7 @@ static const std::map<enum cmd_id, std::vector<std::string>> commands = {
 	{ CMD_ADD, {"add", "new"} },
 	{ CMD_LIST, {"list", "ls"} },
 	{ CMD_DEL, {"del", "rm"} },
+	{ CMD_INFO, { "info" } },
 	{ CMD_HELP, {"help", "-h", "--help"} },
 	{ CMD_VERSION, {"version", "-v", "--version"} },
 };
@@ -55,6 +57,7 @@ static inline void print_help(void) {
 		   "\tadd, new                 Add a new recipe to the database.\n"
 		   "\tlist, ls                 List recipes with filters.\n"
 		   "\tdel, rm                  Delete recipe by ID.\n"
+		   "\tinfo                     Show recipe information.\n"
 		   "\thelp, -h, --help         Show this help information.\n"
 		   "\tversion, -v, --version   Show version information.\n"
 		   << std::endl;

src/cmd.cpp

@@ -137,3 +137,42 @@ int command_delete(int argc, char *argv[]) {
 
 	return ret;
 }
+
+int command_info(const int id) {
+	struct recipe recipe;
+	std::vector<std::string> ingredients, tags;
+	int ret = EXIT_SUCCESS;
+
+	if(not db_open()) {
+		std::cerr << "Failed to open database. Cannot add new entry." << std::endl;
+		return EXIT_FAILURE;
+	}
+
+	if(not db_recipe_exists(id)) {
+		std::cerr << "No recipe with ID '" << id << "'";
+		return EXIT_FAILURE;
+	}
+
+	recipe = db_get_recipe(id);
+	ingredients = db_get_recipe_ingredients(id);
+	tags = db_get_recipe_tags(id);
+
+	db_close();
+
+	std::cout << "Name: " << recipe.name << "\n"
+		<< "Description: " << recipe.description << "\n"
+		<< "ID: " << recipe.id << "\n"
+		<< std::endl;
+
+	std::cout << "Ingredients:" << std::endl;
+	for(auto &ingredient : ingredients)
+		std::cout << "\t- " << ingredient << std::endl;
+	std::cout << std::endl;
+
+	std::cout << "Tags:" << std::endl;
+	for(auto &tag : tags)
+		std::cout << "\t- " << tag << std::endl;
+	std::cout << std::endl;
+
+	return ret;
+}

src/cmd.hpp

@@ -20,3 +20,4 @@
 int command_add(void);
 int command_list(int argc, char *argv[]);
 int command_delete(int argc, char *argv[]);
+int command_info(const int id);

src/db.cpp

@@ -167,6 +167,18 @@ int db_get_recipe_id(const std::string &name) {
 	return table_get_id_by_name("recipes", name);
 }
 
+struct recipe db_get_recipe(const int id) {
+	struct recipe recipe;
+
+	sqlite3_exec(db, std::format("SELECT * FROM recipes WHERE id={};", id).c_str(),
+				 [](void *recipe, int, char **col_data, char**) {
+				 *static_cast<struct recipe*>(recipe) = { std::atoi(col_data[0]), col_data[1], col_data[2] };
+				 return 0;
+				 }, &recipe, nullptr);
+
+	return recipe;
+}
+
 std::vector<struct recipe> db_get_recipes(const std::vector<std::string> &ingredients,
 										  const std::vector<std::string> &tags)
 {
@@ -254,6 +266,18 @@ int db_add_ingredient(const std::string &name) {
 	return db_get_ingredient_id(name);
 }
 
+std::vector<std::string> db_get_recipe_ingredients(const int id) {
+	std::vector<std::string> ingredients;
+
+	sqlite3_exec(db, std::format("SELECT name FROM ingredients WHERE id IN (SELECT ingredient_id FROM recipe_ingredient WHERE recipe_id={});", id).c_str(),
+				 [](void *ingredients, int, char **col_data, char**) {
+				 static_cast<std::vector<std::string>*>(ingredients)->push_back(col_data[0]);
+				 return 0;
+				 }, &ingredients, nullptr);
+
+	return ingredients;
+}
+
 int db_get_ingredient_id(const std::string &name) {
 	if(not db)
 		return -1;
@@ -272,6 +296,18 @@ int db_add_tag(const std::string &name) {
 	return db_get_tag_id(name);
 }
 
+std::vector<std::string> db_get_recipe_tags(const int id) {
+	std::vector<std::string> tags;
+
+	sqlite3_exec(db, std::format("SELECT name FROM tags WHERE id IN (SELECT tag_id FROM recipe_tag WHERE recipe_id={});", id).c_str(),
+				 [](void *tags, int, char **col_data, char**) {
+				 static_cast<std::vector<std::string>*>(tags)->push_back(col_data[0]);
+				 return 0;
+				 }, &tags, nullptr);
+
+	return tags;
+}
+
 int db_get_tag_id(const std::string &name) {
 	if(not db)
 		return -1;

src/db.hpp

@@ -45,6 +45,7 @@ bool db_recipe_exists(const int id);
 static inline bool db_recipe_exists(const std::string &name) {
 	return (db_get_recipe_id(name) > 0);
 }
+struct recipe db_get_recipe(const int id);
 std::vector<struct recipe> db_get_recipes(const std::vector<std::string> &ingredients,
 										  const std::vector<std::string> &tags);
 
@@ -56,6 +57,7 @@ std::vector<struct recipe> db_get_recipes(const std::vector<std::string> &ingred
  * @return ID of newly created ingredient, -1 if DB isn't open, -2 on other failure.
  */
 int db_add_ingredient(const std::string &name);
+std::vector<std::string> db_get_recipe_ingredients(const int id);
 int db_get_ingredient_id(const std::string &name);
 static inline bool db_ingredient_exists(const std::string &name) {
 	return (db_get_ingredient_id(name) > 0);
@@ -69,6 +71,7 @@ static inline bool db_ingredient_exists(const std::string &name) {
  * @return ID of newly created tag, -1 if DB isn't open, -2 on other failure.
  */
 int db_add_tag(const std::string &name);
+std::vector<std::string> db_get_recipe_tags(const int id);
 int db_get_tag_id(const std::string &name);
 static inline bool db_tag_exists(const std::string &name) {
 	return (db_get_tag_id(name) > 0);

src/main.cpp

@@ -18,6 +18,7 @@
 
 #include <iostream>
 #include <cstdlib>
+#include <string>
 
 #include "arg_parse.hpp"
 #include "cmd.hpp"
@@ -44,6 +45,9 @@ int main(int argc, char *argv[]) {
 	case CMD_DEL:
 		ret = command_delete(argc - 2, argv + 2);
 		break;
+	case CMD_INFO:
+		ret = command_info(std::stoi(argv[2]));
+		break;
 	case CMD_HELP:
 		print_help();
 		break;