349 lines
12 KiB
C++
349 lines
12 KiB
C++
#include "recipedatabase.h"
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RecipeDatabase::RecipeDatabase(string filename) : Database(filename){
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this->ensureTablesExist();
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}
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bool RecipeDatabase::storeRecipe(Recipe recipe){
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//Some primary checks to avoid garbage in the database.
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if (recipe.getName().empty() ||
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recipe.getInstruction().getHTML().empty() ||
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recipe.getIngredients().empty()){
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return false;
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}
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//Store a recipe, if it doesn't already exist. This first tries to create the recipe entry, then all subsequent supporting table entries.
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this->executeSQL("BEGIN;");
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ResultTable t = this->selectFrom("recipe", "*", "WHERE name="+surroundString(recipe.getName(), "'"));
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if (!t.isEmpty()){
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fprintf(stderr, "Error storing recipe: Recipe with name %s already exists.\n", recipe.getName().c_str());
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} else {
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bool success = this->insertInto("recipe",
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vector<string>({
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"name",
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"createdDate",
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"cookTime",
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"prepTime",
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"servingCount"
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}),
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vector<string>({
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recipe.getName(),
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recipe.getCreatedDate().toString().toStdString(),
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recipe.getCookTime().toString().toStdString(),
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recipe.getPrepTime().toString().toStdString(),
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std::to_string(recipe.getServings())
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}));
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if (success){
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//If successful, proceed to insert instructions, image, and ingredients, and tags.
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int recipeId = this->getLastInsertedRowId();
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bool ingredientSuccess = true;
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for (unsigned int i = 0; i < recipe.getIngredients().size(); i++){
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if (!this->storeRecipeIngredient(recipe.getIngredients()[i], recipeId)){
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ingredientSuccess = false;
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break;
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}
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}
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if (ingredientSuccess &&
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this->storeInstruction(recipe.getInstruction(), recipeId) &&
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this->storeImage(recipe.getImage(), recipeId) &&
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this->storeTags(recipe.getTags(), recipeId)){
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this->executeSQL("COMMIT;");
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return true;
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}
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}
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}
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this->executeSQL("ROLLBACK;");
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return false;
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}
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bool RecipeDatabase::storeRecipeIngredient(RecipeIngredient ri, int recipeId){
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int ingId = this->storeIngredient(ri);
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if (ingId < 0) return false;
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if (!this->storeUnitOfMeasure(ri.getUnit())) return false;
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return this->insertInto("recipeIngredient",
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vector<string>({
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"ingredientId",
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"recipeId",
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"quantity",
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"unitName",
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"comment"
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}),
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vector<string>({
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std::to_string(ingId),
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std::to_string(recipeId),
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std::to_string(ri.getQuantity()),
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ri.getUnit().getName(),
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ri.getComment()
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}));
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}
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int RecipeDatabase::storeIngredient(Ingredient ingredient){
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ResultTable t = this->selectFrom("ingredient", "*", "WHERE name="+surroundString(ingredient.getName(), "'"));
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if (t.isEmpty()){
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bool success = this->insertInto("ingredient", vector<string>({"foodGroup", "name"}), vector<string>({ingredient.getFoodGroup(), ingredient.getName()}));
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if (success){
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return this->getLastInsertedRowId();
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} else {
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return -1;
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}
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} else {
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return std::stoi(t.valueAt(0, 0));
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}
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}
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bool RecipeDatabase::storeUnitOfMeasure(UnitOfMeasure u){
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ResultTable t = this->selectFrom("unitOfMeasure", "name", "WHERE name="+surroundString(u.getName(), "'"));
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if (!t.isEmpty()){
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return true;
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}
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bool success = this->insertInto("unitOfMeasure",
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vector<string>({
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"name",
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"plural",
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"abbreviation",
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"type",
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"metricCoefficient"
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}),
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vector<string>({
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u.getName(),
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u.getNamePlural(),
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u.getAbbreviation(),
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std::to_string(u.getType()),
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std::to_string(u.getMetricCoefficient())
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}));
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return success;
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}
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bool RecipeDatabase::storeInstruction(Instruction instruction, int recipeId){
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return FileUtils::saveInstruction(recipeId, instruction);
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}
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bool RecipeDatabase::storeImage(QImage image, int recipeId){
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return FileUtils::saveImage(recipeId, image);
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}
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bool RecipeDatabase::storeTags(vector<RecipeTag> tags, int recipeId){
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for (vector<RecipeTag>::iterator it = tags.begin(); it != tags.end(); ++it){
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bool s = this->insertInto("recipeTag",
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vector<string>({
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"recipeId",
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"tagName"
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}),
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vector<string>({
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std::to_string(recipeId),
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(*it).getValue()
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}));
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if (!s){
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return false;
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}
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}
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return true;
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}
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Recipe RecipeDatabase::retrieveRecipe(string name){
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ResultTable t = this->selectFrom("recipe", "*", "WHERE name="+surroundString(name, "'"));
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if (t.isEmpty()){
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fprintf(stderr, "Error: No recipe with name %s found!\n", name.c_str());
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return Recipe();
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}
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return this->readFromResultTable(t);
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}
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Recipe RecipeDatabase::retrieveRandomRecipe(){
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ResultTable t = this->selectFrom("recipe", "*", "ORDER BY RANDOM() LIMIT 1");
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if (t.isEmpty()){
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fprintf(stderr, "Unable to find a random recipe.\n");
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return Recipe();
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}
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return this->readFromResultTable(t);
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}
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vector<Recipe> RecipeDatabase::retrieveAllRecipes(){
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ResultTable t = this->selectFrom("recipe", "name", "ORDER BY name");
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vector<Recipe> recipes;
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for (unsigned int row = 0; row < t.rowCount(); row++){
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recipes.push_back(this->retrieveRecipe(t.valueAt(row, 0)));
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}
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return recipes;
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}
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vector<RecipeIngredient> RecipeDatabase::retrieveRecipeIngredients(int recipeId){
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ResultTable t = this->executeSQL("SELECT ingredient.name, ingredient.foodGroup, "//0, 1
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"recipeIngredient.quantity, recipeIngredient.unitName, recipeIngredient.comment,"//2, 3, 4
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"unitOfMeasure.name, unitOfMeasure.plural, unitOfMeasure.abbreviation, unitOfMeasure.type, unitOfMeasure.metricCoefficient "//5, 6, 7, 8, 9
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"FROM ingredient "
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"INNER JOIN recipeIngredient "
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"ON ingredient.ingredientId = recipeIngredient.ingredientId "
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"INNER JOIN unitOfMeasure "
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"ON recipeIngredient.unitName = unitOfMeasure.name "
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"WHERE recipeIngredient.recipeId = "+std::to_string(recipeId)+";");
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vector<RecipeIngredient> ings;
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for (unsigned int row = 0; row < t.rowCount(); row++){
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RecipeIngredient r(t.valueAt(row, 0),
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t.valueAt(row, 1),
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std::stof(t.valueAt(row, 2)),
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UnitOfMeasure(t.valueAt(row, 5), t.valueAt(row, 6), t.valueAt(row, 7), std::stoi(t.valueAt(row, 8)), std::stod(t.valueAt(row, 9))),
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t.valueAt(row, 4));
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ings.push_back(r);
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}
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return ings;
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}
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vector<Ingredient> RecipeDatabase::retrieveAllIngredients(){
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ResultTable t = this->selectFrom("ingredient", "*", "ORDER BY name");
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vector<Ingredient> ings;
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for (unsigned int row = 0; row < t.rowCount(); row++){
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Ingredient i(t.valueAt(row, 2), t.valueAt(row, 1));
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ings.push_back(i);
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}
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return ings;
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}
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vector<UnitOfMeasure> RecipeDatabase::retrieveAllUnitsOfMeasure(){
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ResultTable t = this->selectFrom("unitOfMeasure", "*", "ORDER BY name");
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vector<UnitOfMeasure> units;
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if (!t.isEmpty()){
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for (unsigned int row = 0; row < t.rowCount(); row++){
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UnitOfMeasure u(t.valueAt(row, 0), t.valueAt(row, 1), t.valueAt(row, 2), std::stoi(t.valueAt(row, 3)), std::stod(t.valueAt(row, 4)));
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units.push_back(u);
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}
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}
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return units;
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}
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vector<RecipeTag> RecipeDatabase::retrieveTags(int recipeId){
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ResultTable t = this->selectFrom("recipeTag", "tagName", "WHERE recipeId="+std::to_string(recipeId));
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vector<RecipeTag> tags;
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if (!t.isEmpty()){
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for (unsigned int row = 0; row < t.rowCount(); row++){
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RecipeTag tag(t.valueAt(row, 0));
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tags.push_back(tag);
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}
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}
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return tags;
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}
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vector<RecipeTag> RecipeDatabase::retrieveAllTags(){
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ResultTable t = this->selectFrom("recipeTag", "tagName", "ORDER BY tagName");
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vector<RecipeTag> tags;
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if (!t.isEmpty()){
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for (unsigned int row = 0; row < t.rowCount(); row++){
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RecipeTag tag(t.valueAt(row, 0));
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tags.push_back(tag);
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}
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}
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return tags;
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}
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bool RecipeDatabase::deleteRecipe(string name){
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ResultTable t = this->selectFrom("recipe", "recipeId", "WHERE name='"+name+"'");
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if (t.rowCount() != 1){
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return false;
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}
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string recipeId = t.valueAt(0, 0);
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return this->deleteRecipe(std::stoi(recipeId));
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}
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bool RecipeDatabase::deleteRecipe(int recipeId){
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string idString = std::to_string(recipeId);
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if (this->selectFrom("recipe", "recipeId", "WHERE recipeId="+idString).isEmpty()){
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printf("Cannot delete. No recipe with ID %d exists.\n", recipeId);
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return false;
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}
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this->executeSQL("BEGIN;");
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bool tagsDeleted = this->deleteFrom("recipeTag", "WHERE recipeId="+idString);
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bool recipeIngredientDeleted = this->deleteFrom("recipeIngredient", "WHERE recipeId="+idString);
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bool recipeDeleted = this->deleteFrom("recipe", "WHERE recipeId="+idString);
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if (tagsDeleted && recipeIngredientDeleted && recipeDeleted){
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this->executeSQL("COMMIT;");
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return true;
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} else {
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this->executeSQL("ROLLBACK;");
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return false;
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}
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}
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bool RecipeDatabase::deleteIngredient(string name){
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ResultTable t = this->executeSQL("SELECT recipeId "
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"FROM recipeIngredient "
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"INNER JOIN ingredient "
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"ON recipeIngredient.ingredientId = ingredient.ingredientId "
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"WHERE ingredient.name='"+name+"';");
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if (!t.isEmpty()){
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//There is at least one recipe dependent on the ingredient.
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return false;
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}
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return this->deleteFrom("ingredient", "WHERE name='"+name+"'");
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}
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bool RecipeDatabase::deleteUnitOfMeasure(string name){
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ResultTable t = this->selectFrom("recipeIngredient", "recipeId", "WHERE unitName='"+name+"'");
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if (!t.isEmpty()){
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return false;
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}
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return this->deleteFrom("unitOfMeasure", "WHERE name='"+name+"'");
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}
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bool RecipeDatabase::deleteTag(RecipeTag tag){
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return this->deleteFrom("recipeTag", "WHERE tagName='"+tag.getValue()+"'");
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}
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void RecipeDatabase::ensureTablesExist(){
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//Make sure that foreign keys are enabled.
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this->executeSQL("PRAGMA foreign_keys = ON;");
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this->executeSQL("BEGIN;");
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//Ingredients table.
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this->executeSQL("CREATE TABLE IF NOT EXISTS ingredient("
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"ingredientId INTEGER PRIMARY KEY,"
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"foodGroup varchar,"
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"name varchar UNIQUE);");
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//Unit of Measure table.
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this->executeSQL("CREATE TABLE IF NOT EXISTS unitOfMeasure("
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"name varchar UNIQUE PRIMARY KEY,"
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"plural varchar,"
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"abbreviation varchar,"
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"type int,"
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"metricCoefficient real);");
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//Recipe table. Each recipe can have at most one instruction, and one image.
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this->executeSQL("CREATE TABLE IF NOT EXISTS recipe("
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"recipeId INTEGER PRIMARY KEY,"
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"name varchar UNIQUE,"
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"createdDate date,"
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"prepTime time,"
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"cookTime time,"
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"servingCount real);");
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//Recipe tags table.
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this->executeSQL("CREATE TABLE IF NOT EXISTS recipeTag("
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"recipeId int,"
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"tagName varchar,"
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"FOREIGN KEY (recipeId) REFERENCES recipe(recipeId));");
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//RecipeIngredient table.
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this->executeSQL("CREATE TABLE IF NOT EXISTS recipeIngredient("
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"ingredientId int,"
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"recipeId int,"
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"quantity real,"
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"unitName varchar,"
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"comment varchar,"
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"FOREIGN KEY (ingredientId) REFERENCES ingredient(ingredientId),"
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"FOREIGN KEY (recipeId) REFERENCES recipe(recipeId),"
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"FOREIGN KEY (unitName) REFERENCES unitOfMeasure(name));");
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this->executeSQL("COMMIT;");
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}
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Recipe RecipeDatabase::readFromResultTable(ResultTable t, int row){
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Recipe r;
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int id = std::stoi(t.valueAt(row, 0));
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r.setName(t.valueAt(row, 1));
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r.setCreatedDate(QDate::fromString(QString::fromStdString(t.valueAt(row, 2))));
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r.setPrepTime(QTime::fromString(QString::fromStdString(t.valueAt(row, 3))));
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r.setCookTime(QTime::fromString(QString::fromStdString(t.valueAt(row, 4))));
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r.setServings(std::stof(t.valueAt(row, 5)));
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r.setInstruction(FileUtils::loadInstruction(id));
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r.setImage(FileUtils::loadImage(id));
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r.setIngredients(this->retrieveRecipeIngredients(id));
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r.setTags(this->retrieveTags(id));
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return r;
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}
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