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RecipeDB
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Merge pull request #3 from andrewlalis/development 

Shift to master. Not done but database abstraction is nearly done.
This commit is contained in:
Andrew Lalis 2018-03-03 10:20:11 +01:00 committed by GitHub
parent 3ef03e2887 446ff8f5ba
commit 9b377a5548
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GPG Key ID: 4AEE18F83AFDEB23
17 changed files with 624 additions and 51 deletions
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22
RecipeDB.pro
View File

@ -12,8 +12,7 @@ TARGET = RecipeDB
TEMPLATE = app
SOURCES += SQLite/sqlite3.c \
model/recipe/instruction.cpp \
SOURCES += model/recipe/instruction.cpp \
model/recipe/recipe.cpp \
userInterface/mainwindow.cpp \
main.cpp \
@ -22,11 +21,13 @@ SOURCES += SQLite/sqlite3.c \
model/recipe/ingredients/ingredient.cpp \
model/recipe/ingredients/ingredientlistmodel.cpp \
model/recipe/ingredients/recipeingredient.cpp \
model/recipe/tags/recipetag.cpp
model/recipe/tags/recipetag.cpp \
SQLite/sqlite3.c \
model/database/resulttable.cpp \
model/database/recipedatabase.cpp \
utils/fileutils.cpp
HEADERS += SQLite/sqlite3.h \
SQLite/sqlite3ext.h \
model/recipe/instruction.h \
HEADERS += model/recipe/instruction.h \
model/recipe/recipe.h \
userInterface/mainwindow.h \
model/database/database.h \
@ -34,7 +35,14 @@ HEADERS += SQLite/sqlite3.h \
model/recipe/ingredients/ingredient.h \
model/recipe/ingredients/ingredientlistmodel.h \
model/recipe/ingredients/recipeingredient.h \
model/recipe/tags/recipetag.h
model/recipe/tags/recipetag.h \
SQLite/sqlite3.h \
SQLite/sqlite3ext.h \
model/database/resulttable.h \
model/database/recipedatabase.h \
utils/fileutils.h
LIBS += -ldl \
FORMS += gui/mainwindow.ui

26
main.cpp
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@ -2,6 +2,7 @@
#include <QApplication>
#include "model/database/database.h"
#include "model/database/recipedatabase.h"
int main(int argc, char *argv[])
{
@ -9,7 +10,30 @@ int main(int argc, char *argv[])
MainWindow w;
w.show();
Database db("test.db");
//TESTING CODE
RecipeDatabase recipeDB("recipes");
// recipeDB.storeIngredient(Ingredient("Apple", "Fruit"));
// recipeDB.storeIngredient(Ingredient("Corn", "Vegetable"));
// recipeDB.storeIngredient(Ingredient("Lettuce", "Vegetable"));
// recipeDB.storeIngredient(Ingredient("Carrot", "Vegetable"));
// recipeDB.executeSQL("SELECT * FROM ingredient;").printData();
//TESTING CODE
vector<RecipeIngredient> ri;
ri.push_back(RecipeIngredient("flour", "grains", 3.0f, UnitOfMeasure("cup", "cups", "c")));
ri.push_back(RecipeIngredient("Baking Powder", "Additives", 1.0f, UnitOfMeasure("Teaspoon", "Teaspoons", "Tsp")));
Recipe rec("Example", ri, Instruction("<b>BOLD</b><i>iTaLiCs</i>"), QImage(), vector<RecipeTag>(), QDate::currentDate(), QTime(0, 30), QTime(0, 25), 10.0f);
bool success = recipeDB.storeRecipe(rec);
printf("Storage successful: %d\n", success);
Recipe reloadRec = recipeDB.retrieveRecipe("Example");
reloadRec.print();
w.loadFromRecipe(reloadRec);
return a.exec();
}

78
model/database/database.cpp
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@ -3,18 +3,49 @@
Database::Database(string filename){
this->filename = filename;
openConnection();
//TESTING CODE
if (tableExists("ingredients")){
printf("Ingredients table already exists.\n");
} else {
printf("Couldn't find the ingredients table.\n");
}
}
Database::~Database(){
closeConnection();
}
ResultTable Database::executeSQL(string statement){
sqlite3_stmt* stmt;
this->sql = statement;
this->returnCode = sqlite3_prepare_v2(this->db, statement.c_str(), -1, &stmt, NULL);
ResultTable t(statement);
if (this->returnCode != SQLITE_OK){
fprintf(stderr, "Unable to successfully prepare SQL statement. Error code: %d\n\tError Message: %s\n", this->returnCode, sqlite3_errmsg(this->db));
return t;
}
t.extractData(stmt);
this->returnCode = sqlite3_finalize(stmt);
return t;
}
bool Database::insertInto(string tableName, vector<string> columnNames, vector<string> values){
if (columnNames.size() != values.size() || columnNames.empty()){
return false;
}
string query = "INSERT INTO "+tableName+" (";
string cols = combineVector(columnNames, ", ");
string vals = combineVector(values, ", ");
query += cols + ") VALUES (" + vals + ");";
ResultTable t = this->executeSQL(query);
return (t.getReturnCode() == SQLITE_DONE);
}
ResultTable Database::selectFrom(string tableName, string columnNames, string conditions){
if (columnNames.size() == 0 || tableName.empty()){
return ResultTable();
}
string query = "SELECT " + columnNames + " FROM " + tableName + " WHERE " + conditions + ";";
return this->executeSQL(query);
}
void Database::openConnection(){
this->returnCode = sqlite3_open(this->filename.c_str(), &this->db);
if (this->returnCode || this->db == NULL){
@ -31,17 +62,30 @@ void Database::closeConnection(){
this->dbIsOpen = false;
}
bool Database::tableExists(string tableName){
if (this->dbIsOpen){
this->sql = "SELECT name FROM sqlite_master WHERE type='table' AND name='"+tableName+"';";
const char* str = this->sql.c_str();
this->returnCode = sqlite3_exec(this->db, str, NULL, 0, &this->errorMsg);
if (this->returnCode == SQLITE_ERROR){
fprintf(stderr, "Unable to select name from master table list: %s\n", this->errorMsg);
return false;
} else {
return true;
string Database::combineVector(std::vector<string> strings, string mid){
if (strings.empty()){
return "";
}
std::string result = surroundString(strings[0], "'");
for (std::vector<std::string>::iterator it = strings.begin() + 1; it != strings.end(); ++it){
result += mid + surroundString((*it), "'");
}
return false;
return result;
}
string Database::surroundString(string s, string surround){
return surround+s+surround;
}
bool Database::tableExists(string tableName){
if (tableName.empty() || this->db == NULL || !this->dbIsOpen){
return false;
}
ResultTable t = this->selectFrom("sqlite_master", "name", "type='table' AND name='"+tableName+"'");
//ResultTable t = executeSQL("SELECT name FROM sqlite_master WHERE type='table' AND name='"+tableName+"';");
return !t.isEmpty();
}
int Database::getLastInsertedRowId(){
return sqlite3_last_insert_rowid(this->db);
}

24
model/database/database.h
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@ -3,19 +3,35 @@
#include <string>
#include <vector>
#include <numeric>
#include "SQLite/sqlite3.h"
#include "model/recipe/ingredients/ingredient.h"
#include "resulttable.h"
using namespace std;
/**
* @brief The Database class is responsible for generic abstraction of commonly used database features.
*/
class Database
{
public:
//Creates and opens a database connection to a file of the given name. If not there, this will generate a database.
Database(string filename);
~Database();
void insertIngredient(Ingredient);
//Executes an SQL string statement in a safe way and returns the result.
ResultTable executeSQL(string statement);
bool insertInto(string tableName, vector<string> columnNames, vector<string> values);
ResultTable selectFrom(string tableName, string columnNames, string conditions);
bool tableExists(string tableName);
int getLastInsertedRowId();
protected:
string surroundString(string s, string surround);
private:
//SQL Instance variables.
@ -28,11 +44,7 @@ private:
void openConnection();
void closeConnection();
//Guarantees that all tables from the schema exist.
void ensureTablesExist();
//Utility methods.
bool tableExists(string tableName);
std::string combineVector(std::vector<std::string> strings, std::string mid);
};
#endif // DATABASE_H

182
model/database/recipedatabase.cpp Normal file
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@ -0,0 +1,182 @@
#include "recipedatabase.h"
RecipeDatabase::RecipeDatabase(string filename) : Database(filename){
this->ensureTablesExist();
}
bool RecipeDatabase::storeRecipe(Recipe recipe){
///TODO: Implement this in a smart way using transaction.
this->executeSQL("BEGIN;");
ResultTable t = this->selectFrom("recipe", "*", "name="+surroundString(recipe.getName(), "'"));
if (!t.isEmpty()){
fprintf(stderr, "Error storing recipe: Recipe with name %s already exists.\n", recipe.getName().c_str());
} else {
bool success = this->insertInto("recipe",
vector<string>({
"name",
"createdDate",
"cookTime",
"prepTime",
"servingCount"
}),
vector<string>({
recipe.getName(),
recipe.getCreatedDate().toString().toStdString(),
recipe.getCookTime().toString().toStdString(),
recipe.getPrepTime().toString().toStdString(),
std::to_string(recipe.getServings())
}));
if (success){
//If successful, proceed to insert instructions, image, and ingredients, and tags.
int recipeId = this->getLastInsertedRowId();
bool ingredientSuccess = true;
for (unsigned int i = 0; i < recipe.getIngredients().size(); i++){
if (!this->storeRecipeIngredient(recipe.getIngredients()[i], recipeId)){
ingredientSuccess = false;
break;
}
}
if (ingredientSuccess &&
this->storeInstruction(recipe.getInstruction(), recipeId) &&
this->storeImage(recipe.getImage(), recipeId) &&
this->storeTags(recipe.getTags(), recipeId)){
this->executeSQL("COMMIT;");
return true;
}
}
}
this->executeSQL("ROLLBACK;");
return false;
}
bool RecipeDatabase::storeRecipeIngredient(RecipeIngredient ri, int recipeId){
//First check if the base ingredient has been added to the database. This is done within storeIngredient().
ResultTable t = this->selectFrom("ingredient", "ingredientId", "name="+surroundString(ri.getName(), "'"));
int ingId = 0;
if (t.isEmpty()){
if (!this->insertInto("ingredient", vector<string>({"foodGroup", "name"}), vector<string>({ri.getFoodGroup(), ri.getName()}))){
return false;
}
ingId = this->getLastInsertedRowId();
} else {
ingId = std::stoi(t.valueAt(0, 0));
}
return this->insertInto("recipeIngredient",
vector<string>({
"ingredientId",
"recipeId",
"quantity",
"unitName",
"comment"
}),
vector<string>({
std::to_string(ingId),
std::to_string(recipeId),
std::to_string(ri.getQuantity()),
ri.getUnit().getName(),
ri.getComment()
}));
}
void RecipeDatabase::storeIngredient(Ingredient ingredient){
ResultTable t = this->selectFrom("ingredient", "*", "name="+surroundString(ingredient.getName(), "'"));
if (t.isEmpty()){
this->insertInto("ingredient", vector<string>({"foodGroup", "name"}), vector<string>({ingredient.getFoodGroup(), ingredient.getName()}));
}
}
bool RecipeDatabase::storeInstruction(Instruction instruction, int recipeId){
return FileUtils::saveInstruction(recipeId, instruction);
}
bool RecipeDatabase::storeImage(QImage image, int recipeId){
return FileUtils::saveImage(recipeId, image);
}
bool RecipeDatabase::storeTags(vector<RecipeTag> tags, int recipeId){
for (vector<RecipeTag>::iterator it = tags.begin(); it != tags.end(); ++it){
bool s = this->insertInto("recipeTag",
vector<string>({
"recipeId",
"tagName"
}),
vector<string>({
std::to_string(recipeId),
(*it).getValue()
}));
if (!s){
return false;
}
}
return true;
}
Recipe RecipeDatabase::retrieveRecipe(string name){
ResultTable t = this->selectFrom("recipe", "*", "name="+surroundString(name, "'"));
if (t.isEmpty()){
fprintf(stderr, "Error: No recipe with name %s found!\n", name.c_str());
return Recipe();
}
t.printData();
Recipe r;
int id = std::stoi(t.valueAt(0, 0));
r.setName(t.valueAt(0, 1));
r.setCreatedDate(QDate::fromString(QString::fromStdString(t.valueAt(0, 2))));
r.setPrepTime(QTime::fromString(QString::fromStdString(t.valueAt(0, 3))));
r.setCookTime(QTime::fromString(QString::fromStdString(t.valueAt(0, 4))));
r.setServings(std::stof(t.valueAt(0, 5)));
r.setInstruction(FileUtils::loadInstruction(id));
r.setImage(FileUtils::loadImage(id));
r.setIngredients(this->retrieveRecipeIngredients(id));
return r;
}
vector<RecipeIngredient> RecipeDatabase::retrieveRecipeIngredients(int recipeId){
ResultTable t = this->executeSQL("SELECT ingredient.name, ingredient.foodGroup, recipeIngredient.quantity, recipeIngredient.unitName, recipeIngredient.comment "
"FROM ingredient "
"INNER JOIN recipeIngredient "
"ON ingredient.ingredientId = recipeIngredient.ingredientId "
"AND recipeIngredient.recipeId = "+std::to_string(recipeId)+";");
t.printData();
vector<RecipeIngredient> ings;
for (unsigned int row = 0; row < t.rowCount(); row++){
RecipeIngredient r(t.valueAt(row, 0), t.valueAt(row, 1), std::stof(t.valueAt(row, 2)), UnitOfMeasure(t.valueAt(row, 3)));
ings.push_back(r);
}
return ings;
}
void RecipeDatabase::ensureTablesExist(){
//Make sure that foreign keys are enabled.
this->executeSQL("PRAGMA foreign_keys = ON;");
this->executeSQL("BEGIN;");
//Ingredients table.
this->executeSQL("CREATE TABLE IF NOT EXISTS ingredient("
"ingredientId INTEGER PRIMARY KEY,"
"foodGroup varchar,"
"name varchar UNIQUE);");
//Recipe table. Each recipe can have at most one instruction, and one image.
this->executeSQL("CREATE TABLE IF NOT EXISTS recipe("
"recipeId INTEGER PRIMARY KEY,"
"name varchar UNIQUE,"
"createdDate date,"
"prepTime time,"
"cookTime time,"
"servingCount real);");
//Recipe tags table.
this->executeSQL("CREATE TABLE IF NOT EXISTS recipeTag("
"recipeId int,"
"tagName varchar,"
"FOREIGN KEY (recipeId) REFERENCES recipe(recipeId));");
//RecipeIngredient table.
this->executeSQL("CREATE TABLE IF NOT EXISTS recipeIngredient("
"ingredientId int,"
"recipeId int,"
"quantity real,"
"unitName varchar,"
"comment varchar,"
"FOREIGN KEY (ingredientId) REFERENCES ingredient(ingredientId),"
"FOREIGN KEY (recipeId) REFERENCES recipe(recipeId));");
this->executeSQL("COMMIT;");
}

39
model/database/recipedatabase.h Normal file
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@ -0,0 +1,39 @@
#ifndef RECIPEDATABASE_H
#define RECIPEDATABASE_H
#include "database.h"
#include "model/recipe/recipe.h"
#include "utils/fileutils.h"
using namespace std;
/**
* @brief The RecipeDatabase class represents the precise database used for the recipe storage, and is specialized.
*/
class RecipeDatabase : public Database
{
public:
RecipeDatabase(string filename);
//Stores a full recipe in the database.
bool storeRecipe(Recipe recipe);
//SQL Helper methods.
bool storeRecipeIngredient(RecipeIngredient ri, int recipeId);
void storeIngredient(Ingredient ingredient);
bool storeInstruction(Instruction instruction, int recipeId);
bool storeImage(QImage image, int recipeId);
bool storeTags(vector<RecipeTag> tags, int recipeId);
Recipe retrieveRecipe(string name);
vector<RecipeIngredient> retrieveRecipeIngredients(int recipeId);
private:
//Utility methods.
void ensureTablesExist();
};
#endif // RECIPEDATABASE_H

92
model/database/resulttable.cpp Normal file
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@ -0,0 +1,92 @@
#include "resulttable.h"
ResultTable::ResultTable(){
}
ResultTable::ResultTable(string query){
this->originalQuery = query;
}
void ResultTable::extractData(sqlite3_stmt *stmt){
this->values.clear();
int res = sqlite3_step(stmt);
while (res == SQLITE_ROW){
processRow(stmt);
res = sqlite3_step(stmt);
}
this->queryCode = res;
}
void ResultTable::processRow(sqlite3_stmt *stmt){
int colCount = sqlite3_column_count(stmt);
vector<string> currentRow;
for (int i = 0; i < colCount; i++){
currentRow.push_back(convertToString(sqlite3_column_value(stmt, i)));
}
this->values.push_back(currentRow);
}
void ResultTable::printData(){
if (this->isEmpty()){
printf("Result table is empty.\n");
return;
}
printf("Printing table: [%d x %d]\t%s\n", this->rowCount(), this->columnCount(), this->originalQuery.c_str());
for (unsigned int row = 0; row < this->rowCount(); row++){
for (unsigned int col = 0; col < this->columnCount(); col++){
printf("| %s ", this->values[row][col].c_str());
}
printf("\n");
}
}
bool ResultTable::isEmpty(){
return this->values.empty();
}
string ResultTable::valueAt(unsigned int row, unsigned int col){
if (isIndexValid(row, col)){
return this->values[row][col];
} else {
fprintf(stderr, "Out of bounds error while trying to get value in result table at [%d, %d].\n", row, col);
return "";
}
}
int ResultTable::getReturnCode(){
return this->queryCode;
}
string ResultTable::getOriginalQuery(){
return this->originalQuery;
}
unsigned int ResultTable::columnCount(){
if (this->isEmpty()){
return 0;
}
return this->values[0].size();
}
unsigned int ResultTable::rowCount(){
if (this->isEmpty()){
return 0;
}
return this->values.size();
}
string ResultTable::convertToString(sqlite3_value *val){
const unsigned char* raw_text = sqlite3_value_text(val);
if (raw_text == 0){
return "";
}
string st = (const char*) raw_text;
return st;
}
bool ResultTable::isIndexValid(unsigned int row, unsigned int col){
return (row < this->values.size()) && (col < this->values[0].size());
}

46
model/database/resulttable.h Normal file
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@ -0,0 +1,46 @@
#ifndef RESULTTABLE_H
#define RESULTTABLE_H
#include <vector>
#include <string>
#include "SQLite/sqlite3.h"
using namespace std;
/**
* @brief The ResultTable class is an object that contains the results of an SQL query, in string form.
*/
class ResultTable
{
public:
//Constructs an empty table.
ResultTable();
//Constructs a table with the original query saved.
ResultTable(string query);
//Gets all the data from the result set and stores it internally as strings.
void extractData(sqlite3_stmt* stmt);
//Stores the information from one row of a result set.
void processRow(sqlite3_stmt* stmt);
//Displays the data somewhat legibly.
void printData();
bool isEmpty();
string valueAt(unsigned int row, unsigned int col);
int getReturnCode();
string getOriginalQuery();
unsigned int columnCount();
unsigned int rowCount();
private:
vector<vector<string>> values;
int queryCode;
string originalQuery;
//Utility methods.
string convertToString(sqlite3_value* val);
bool isIndexValid(unsigned int row, unsigned int col);
};
#endif // RESULTTABLE_H

4
model/recipe/ingredients/recipeingredient.cpp
View File

@ -12,6 +12,10 @@ RecipeIngredient::RecipeIngredient(Ingredient i, float quantity, UnitOfMeasure u
setUnit(unit);
}
RecipeIngredient::RecipeIngredient(){
}
float RecipeIngredient::getQuantity() const{
return this->quantity;
}

1
model/recipe/ingredients/recipeingredient.h
View File

@ -19,6 +19,7 @@ public:
RecipeIngredient(string name, string foodGroup, float quantity, UnitOfMeasure unit);
//Constructor using data from a child ingredient.
RecipeIngredient(Ingredient i, float quantity, UnitOfMeasure unit);
RecipeIngredient();
//Getters
float getQuantity() const;

7
model/recipe/ingredients/unitofmeasure.cpp
View File

@ -6,6 +6,13 @@ UnitOfMeasure::UnitOfMeasure(string name, string plural, string abbreviation){
this->abbreviation = abbreviation;
}
UnitOfMeasure::UnitOfMeasure(string name){
this->name = name;
this->plural = name + "s";
this->abbreviation = "NULL";
///TODO: Make actual guessing of this stuff.
}
UnitOfMeasure::UnitOfMeasure() : UnitOfMeasure::UnitOfMeasure("", "", ""){
//Default constructor initializes all fields to empty strings.
}

2
model/recipe/ingredients/unitofmeasure.h
View File

@ -14,6 +14,8 @@ class UnitOfMeasure
public:
//Full constructor.
UnitOfMeasure(string name, string plural, string abbreviation);
//Attempt to guess unit from just a string.
UnitOfMeasure(string name);
//Constructor with default values.
UnitOfMeasure();

28
model/recipe/recipe.cpp
View File

@ -32,6 +32,10 @@ QImage Recipe::getImage() const{
return this->image;
}
vector<RecipeTag> Recipe::getTags() const{
return this->tags;
}
QDate Recipe::getCreatedDate() const{
return this->createdDate;
}
@ -91,3 +95,27 @@ void Recipe::setCookTime(QTime newTime){
void Recipe::setServings(float newServingsCount){
this->servings = newServingsCount;
}
void Recipe::print(){
printf("Recipe: %s, Created on: %s, Prep time: %s, Cook time: %s, Serves: %f\n",
this->name.c_str(),
this->createdDate.toString().toStdString().c_str(),
this->prepTime.toString().toStdString().c_str(),
this->cookTime.toString().toStdString().c_str(),
this->servings);
printf("\tInstruction: %s\n", this->instruction.getHTML().c_str());
printf("\tIngredients:\n");
for (vector<RecipeIngredient>::iterator it = this->ingredients.begin(); it != this->ingredients.end(); ++it){
RecipeIngredient ri = *it;
printf("\t\t%s, Food Group: %s, Quantity: %f, Unit: %s\n",
ri.getName().c_str(),
ri.getFoodGroup().c_str(),
ri.getQuantity(),
ri.getUnit().getName().c_str());
}
printf("\tTags:\n");
for (vector<RecipeTag>::iterator it = this->tags.begin(); it != this->tags.end(); ++it){
RecipeTag t = *it;
printf("\t\t%s\n", t.getValue().c_str());
}
}

2
model/recipe/recipe.h
View File

@ -58,6 +58,8 @@ public:
void setPrepTime(QTime newTime);
void setCookTime(QTime newTime);
void setServings(float newServingsCount);
void print();
private:
//Main information.
string name; //The name of the recipe.

9
userInterface/mainwindow.cpp
View File

@ -7,15 +7,6 @@ MainWindow::MainWindow(QWidget *parent) :
ui->setupUi(this);
ui->ingredientsListView->setModel(&this->ingredientModel);
//TESTING CODE
vector<RecipeIngredient> ri;
ri.push_back(RecipeIngredient("flour", "grains", 3.0f, UnitOfMeasure("cup", "cups", "c")));
ri.push_back(RecipeIngredient("Baking Powder", "Additives", 1.0f, UnitOfMeasure("Teaspoon", "Teaspoons", "Tsp")));
Recipe rec("Example", ri, Instruction("<b>BOLD</b><i>iTaLiCs</i>"), QImage(), vector<RecipeTag>(), QDate::currentDate(), QTime(0, 30), QTime(0, 25), 10.0f);
this->loadFromRecipe(rec);
}
MainWindow::~MainWindow(){

64
utils/fileutils.cpp Normal file
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@ -0,0 +1,64 @@
#include "fileutils.h"
namespace FileUtils{
void ensureAppDataFolderExists(){
QDir folder(appDataPath);
if (!folder.exists()){
folder.mkpath(".");
}
}
bool saveInstruction(int nr, Instruction instruction){
ensureAppDataFolderExists();
QString filename = appDataPath + QString::fromStdString(std::to_string(nr)) +".html";
QFile file(filename);
if (file.open(QIODevice::WriteOnly)){
QTextStream stream(&file);
stream<<instruction.getHTML().c_str()<<endl;
file.close();
return true;
} else {
fprintf(stderr, "Error opening file: %s to write instruction.\n", filename.toStdString().c_str());
return false;
}
}
Instruction loadInstruction(int nr){
QString filename = appDataPath + QString::fromStdString(std::to_string(nr)) + ".html";
QFile file(filename);
if (!file.exists()){
fprintf(stderr, "Instruction Nr: %d does not exist.\n", nr);
return Instruction();
}
if (file.open(QIODevice::ReadOnly)){
QTextStream stream(&file);
QString s = stream.readAll();
file.close();
return Instruction(s.toStdString());
} else {
fprintf(stderr, "Error opening file: %s to read instruction.\n", filename.toStdString().c_str());
return Instruction();
}
}
bool saveImage(int nr, QImage image){
QString filename = appDataPath + QString::fromStdString(std::to_string(nr)) + ".png";
QFile file(filename);
if (file.open(QIODevice::WriteOnly)){
image.save(&file, "PNG");
file.close();
return true;
} else {
fprintf(stderr, "Error saving image to file: %s\n", filename.toStdString().c_str());
return false;
}
}
QImage loadImage(int nr){
QString filename = appDataPath + QString::fromStdString(std::to_string(nr)) + ".png";
QImage img(filename);
return img;
}
}

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utils/fileutils.h Normal file
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#ifndef FILEUTILS_H
#define FILEUTILS_H
#include <QStandardPaths>
#include <QFile>
#include <QDir>
#include <QTextStream>
#include <QImage>
#include "model/recipe/instruction.h"
namespace FileUtils{
const QString appDataPath = QStandardPaths::writableLocation(QStandardPaths::HomeLocation)+"/.recipeDB/";
void ensureAppDataFolderExists();
bool saveInstruction(int nr, Instruction instruction);
Instruction loadInstruction(int nr);
bool saveImage(int nr, QImage image);
QImage loadImage(int nr);
}
#endif // FILEUTILS_H