Factorize go

bouquins/bouquins.go

@@ -219,12 +219,9 @@ type ReqParams struct {
 	AllWords bool
 }
 
-func (app *Bouquins) render(res http.ResponseWriter, tpl string, model interface{}) error {
+// add functions to templates
-	return app.Template.ExecuteTemplate(res, tpl, model)
-}
 func TemplatesFunc() *template.Template {
-	tpl := template.New("")
+	return template.New("").Funcs(template.FuncMap{
-	tpl.Funcs(template.FuncMap{
 		"humanSize": func(sz int64) string {
 			return datasize.ByteSize(sz).HumanReadable()
 		},
@@ -236,17 +233,26 @@ func TemplatesFunc() *template.Template {
 			return "/calibre/" + url.PathEscape(book.Path) + "/" + url.PathEscape(data.Name) + "." + strings.ToLower(data.Format)
 		},
 	})
-	return tpl
 }
 
+// output page with template
+func (app *Bouquins) render(res http.ResponseWriter, tpl string, model interface{}) error {
+	return app.Template.ExecuteTemplate(res, tpl, model)
+}
+
+// output as JSON
 func writeJson(res http.ResponseWriter, model interface{}) error {
 	res.Header().Set("Content-Type", "application/json")
 	enc := json.NewEncoder(res)
 	return enc.Encode(model)
 }
+
+// test if JSON requested
 func isJson(req *http.Request) bool {
 	return req.Header.Get("Accept") == "application/json"
 }
+
+// get integer parameter
 func paramInt(name string, req *http.Request) int {
 	val := req.URL.Query().Get(name)
 	if val == "" {
@@ -259,6 +265,8 @@ func paramInt(name string, req *http.Request) int {
 	}
 	return valInt
 }
+
+// get order parameter
 func paramOrder(req *http.Request) string {
 	val := req.URL.Query().Get(PARAM_ORDER)
 	if val == "desc" || val == "asc" {
@@ -267,6 +275,7 @@ func paramOrder(req *http.Request) string {
 	return ""
 }
 
+// get common request parameters
 func params(req *http.Request) *ReqParams {
 	page, perpage := paramInt(PARAM_PAGE, req), paramInt(PARAM_PERPAGE, req)
 	limit := perpage
@@ -283,27 +292,22 @@ func params(req *http.Request) *ReqParams {
 	return &ReqParams{limit, offset, sort, order, terms, false}
 }
 
-// ROUTES //
+// single element or list elements page
-
+func listOrId(res http.ResponseWriter, req *http.Request, url string,
-func (app *Bouquins) IndexPage(res http.ResponseWriter, req *http.Request) {
+	listFunc func(res http.ResponseWriter, req *http.Request) error,
-	count, err := app.BookCount()
+	idFunc func(idParam string, res http.ResponseWriter, req *http.Request) error) error {
-	if err != nil {
+	if !strings.HasPrefix(req.URL.Path, url) {
-		log.Print(err)
+		return errors.New("Invalid URL") // FIXME 404
 	}
-	model := NewIndexModel("", count)
+	idParam := req.URL.Path[len(url):]
-	if isJson(req) {
+	if len(idParam) == 0 {
-		err := writeJson(res, model)
+		return listFunc(res, req)
-		if err != nil {
-			log.Println(err)
-			http.Error(res, err.Error(), 500)
-		}
-	} else {
-		err = app.render(res, TPL_INDEX, model)
-		if err != nil {
-			log.Println(err)
-		}
 	}
+	return idFunc(idParam, res, req)
 }
+
+// LIST ELEMENTS PAGES //
+
 func (app *Bouquins) BooksListPage(res http.ResponseWriter, req *http.Request) error {
 	if isJson(req) {
 		books, count, more, err := app.BooksAdv(params(req))
@@ -314,35 +318,6 @@ func (app *Bouquins) BooksListPage(res http.ResponseWriter, req *http.Request) e
 	}
 	return errors.New("Invalid mime")
 }
-func (app *Bouquins) BookPage(idParam string, res http.ResponseWriter, req *http.Request) error {
-	id, err := strconv.Atoi(idParam)
-	if err != nil {
-		return nil
-	}
-	book, err := app.BookFull(int64(id))
-	if err != nil {
-		return nil
-	}
-	return app.render(res, TPL_BOOKS, &BookModel{*NewBouquinsModel(book.Title, "book"), book})
-}
-func (app *Bouquins) BooksPage(res http.ResponseWriter, req *http.Request) {
-	var err error
-	var idParam = ""
-	if strings.HasPrefix(req.URL.Path, URL_BOOKS) {
-		idParam = req.URL.Path[len(URL_BOOKS):]
-	} else {
-		err = errors.New("Invalid URL") // FIXME 404
-	}
-	if len(idParam) == 0 {
-		err = app.BooksListPage(res, req)
-	} else {
-		err = app.BookPage(idParam, res, req)
-	}
-	if err != nil {
-		log.Println(err)
-		http.Error(res, err.Error(), 500)
-	}
-}
 func (app *Bouquins) AuthorsListPage(res http.ResponseWriter, req *http.Request) error {
 	if isJson(req) {
 		authors, count, more, err := app.AuthorsAdv(params(req))
@@ -353,6 +328,30 @@ func (app *Bouquins) AuthorsListPage(res http.ResponseWriter, req *http.Request)
 	}
 	return errors.New("Invalid mime")
 }
+func (app *Bouquins) SeriesListPage(res http.ResponseWriter, req *http.Request) error {
+	if isJson(req) {
+		series, count, more, err := app.SeriesAdv(params(req))
+		if err != nil {
+			return err
+		}
+		return writeJson(res, NewSeriesResultsModel(series, more, count))
+	}
+	return errors.New("Invalid mime")
+}
+
+// SINGLE ELEMENT PAGES //
+
+func (app *Bouquins) BookPage(idParam string, res http.ResponseWriter, req *http.Request) error {
+	id, err := strconv.Atoi(idParam)
+	if err != nil {
+		return err
+	}
+	book, err := app.BookFull(int64(id))
+	if err != nil {
+		return err
+	}
+	return app.render(res, TPL_BOOKS, &BookModel{*NewBouquinsModel(book.Title, "book"), book})
+}
 func (app *Bouquins) AuthorPage(idParam string, res http.ResponseWriter, req *http.Request) error {
 	id, err := strconv.Atoi(idParam)
 	if err != nil {
@@ -364,34 +363,6 @@ func (app *Bouquins) AuthorPage(idParam string, res http.ResponseWriter, req *ht
 	}
 	return app.render(res, TPL_AUTHORS, &AuthorModel{*NewBouquinsModel(author.Name, "author"), author})
 }
-func (app *Bouquins) AuthorsPage(res http.ResponseWriter, req *http.Request) {
-	var err error
-	var idParam = ""
-	if strings.HasPrefix(req.URL.Path, URL_AUTHORS) {
-		idParam = req.URL.Path[len(URL_AUTHORS):]
-	} else {
-		err = errors.New("Invalid URL") // FIXME 404
-	}
-	if len(idParam) == 0 {
-		err = app.AuthorsListPage(res, req)
-	} else {
-		err = app.AuthorPage(idParam, res, req)
-	}
-	if err != nil {
-		log.Println(err)
-		http.Error(res, err.Error(), 500)
-	}
-}
-func (app *Bouquins) SeriesListPage(res http.ResponseWriter, req *http.Request) error {
-	if isJson(req) {
-		series, count, more, err := app.SeriesAdv(params(req))
-		if err != nil {
-			return err
-		}
-		return writeJson(res, NewSeriesResultsModel(series, more, count))
-	}
-	return errors.New("Invalid mime")
-}
 func (app *Bouquins) SeriePage(idParam string, res http.ResponseWriter, req *http.Request) error {
 	id, err := strconv.Atoi(idParam)
 	if err != nil {
@@ -403,34 +374,32 @@ func (app *Bouquins) SeriePage(idParam string, res http.ResponseWriter, req *htt
 	}
 	return app.render(res, TPL_SERIES, &SeriesModel{*NewBouquinsModel(series.Name, "series"), series})
 }
-func (app *Bouquins) SeriesPage(res http.ResponseWriter, req *http.Request) {
+
-	var err error
+// ROUTES //
-	var idParam = ""
+
-	if strings.HasPrefix(req.URL.Path, URL_SERIES) {
+func (app *Bouquins) BooksPage(res http.ResponseWriter, req *http.Request) error {
-		idParam = req.URL.Path[len(URL_SERIES):]
+	return listOrId(res, req, URL_BOOKS, app.BooksListPage, app.BookPage)
-	} else {
-		err = errors.New("Invalid URL") // FIXME 404
-	}
-	if len(idParam) == 0 {
-		err = app.SeriesListPage(res, req)
-	} else {
-		err = app.SeriePage(idParam, res, req)
-	}
-	if err != nil {
-		log.Println(err)
-		http.Error(res, err.Error(), 500)
-	}
 }
-func (app *Bouquins) SearchPage(res http.ResponseWriter, req *http.Request) {
+func (app *Bouquins) AuthorsPage(res http.ResponseWriter, req *http.Request) error {
-	model := NewSearchModel()
+	return listOrId(res, req, URL_AUTHORS, app.AuthorsListPage, app.AuthorPage)
-	err := app.render(res, TPL_SEARCH, model)
-	if err != nil {
-		log.Println(err)
-	}
 }
-func (app *Bouquins) AboutPage(res http.ResponseWriter, req *http.Request) {
+func (app *Bouquins) SeriesPage(res http.ResponseWriter, req *http.Request) error {
-	err := app.render(res, TPL_ABOUT, NewBouquinsModel("A propos", "about"))
+	return listOrId(res, req, URL_SERIES, app.SeriesListPage, app.SeriePage)
-	if err != nil {
+}
-		log.Println(err)
+func (app *Bouquins) SearchPage(res http.ResponseWriter, req *http.Request) error {
-	}
+	return app.render(res, TPL_SEARCH, NewSearchModel())
+}
+func (app *Bouquins) AboutPage(res http.ResponseWriter, req *http.Request) error {
+	return app.render(res, TPL_ABOUT, NewBouquinsModel("A propos", "about"))
+}
+func (app *Bouquins) IndexPage(res http.ResponseWriter, req *http.Request) error {
+	count, err := app.BookCount()
+	if err != nil {
+		return err
+	}
+	model := NewIndexModel("", count)
+	if isJson(req) {
+		return writeJson(res, model)
+	}
+	return app.render(res, TPL_INDEX, model)
 }

bouquins/db.go

@@ -172,6 +172,33 @@ type Query struct {
 	Desc      bool
 }
 
+func (app *Bouquins) searchHelper(all bool, terms []string, stub, termExpr, orderExpr string) (*sql.Rows, error) {
+	query := stub
+	queryTerms := make([]interface{}, 0, len(terms))
+	for i, term := range terms {
+		queryTerms = append(queryTerms, "%"+term+"%")
+		query += termExpr
+		if i < len(terms)-1 && all {
+			query += STMT_BOOL_AND
+		}
+		if i < len(terms)-1 && !all {
+			query += STMT_BOOL_OR
+		}
+	}
+	query += orderExpr
+	log.Println("Search:", query)
+
+	stmt, err := app.DB.Prepare(query)
+	if err != nil {
+		return nil, err
+	}
+	rows, err := stmt.Query(queryTerms...)
+	if err != nil {
+		return nil, err
+	}
+	return rows, nil
+}
+
 // PREPARED STATEMENTS //
 func (app *Bouquins) PrepareAll() error {
 	errcount := 0
@@ -217,5 +244,5 @@ func (app *Bouquins) psSort(sortNameField string, qt QueryType, sort, order stri
 
 // prepared statement without sort
 func (app *Bouquins) ps(qt QueryType) (*sql.Stmt, error) {
-	return app.psSortBooks(qt, "", "")
+	return app.psSort("any", qt, "", "")
 }

bouquins/dbauthors.go

@@ -2,37 +2,17 @@ package bouquins
 
 import (
 	"database/sql"
-	"log"
 )
 
 // SUB QUERIES //
 
 func (app *Bouquins) searchAuthors(limit int, terms []string, all bool) ([]*AuthorAdv, int, error) {
+	rows, err := app.searchHelper(all, terms, STMT_AUTHORS_SEARCH, STMT_SEARCH_TERM_AUTHOR, STMT_SEARCH_ORDER_AUTHORS)
+	if err != nil {
+		return nil, 0, err
+	}
 	authors := make([]*AuthorAdv, 0, limit)
 	count := 0
-	query := STMT_AUTHORS_SEARCH
-	queryTerms := make([]interface{}, 0, len(terms))
-	for i, term := range terms {
-		queryTerms = append(queryTerms, "%"+term+"%")
-		query += STMT_SEARCH_TERM_AUTHOR
-		if i < len(terms)-1 && all {
-			query += STMT_BOOL_AND
-		}
-		if i < len(terms)-1 && !all {
-			query += STMT_BOOL_OR
-		}
-	}
-	query += STMT_SEARCH_ORDER_AUTHORS
-	log.Println("Search:", query)
-
-	stmt, err := app.DB.Prepare(query)
-	if err != nil {
-		return nil, 0, err
-	}
-	rows, err := stmt.Query(queryTerms...)
-	if err != nil {
-		return nil, 0, err
-	}
 	defer rows.Close()
 	for rows.Next() {
 		if len(authors) <= limit {

bouquins/dbbooks.go

@@ -2,7 +2,6 @@ package bouquins
 
 import (
 	"database/sql"
-	"log"
 )
 
 // MERGE SUB QUERIES //
@@ -16,34 +15,13 @@ func assignAuthorsTagsBooks(books []*BookAdv, authors map[int64][]*Author, tags
 // SUB QUERIES //
 
 func (app *Bouquins) searchBooks(limit int, terms []string, all bool) ([]*BookAdv, int, error) {
-	books := make([]*BookAdv, 0, limit)
+	rows, err := app.searchHelper(all, terms, STMT_BOOKS0+STMT_WHERE, STMT_SEARCH_TERM_BOOKS, STMT_SEARCH_ORDER_BOOKS)
-	// FIXME factorize searchAuthors,searchSeries
-	count := 0
-	query := STMT_BOOKS0 + STMT_WHERE
-	queryTerms := make([]interface{}, 0, len(terms))
-	for i, term := range terms {
-		queryTerms = append(queryTerms, "%"+term+"%")
-		query += STMT_SEARCH_TERM_BOOKS
-		if i < len(terms)-1 && all {
-			query += STMT_BOOL_AND
-		}
-		if i < len(terms)-1 && !all {
-			query += STMT_BOOL_OR
-		}
-	}
-	query += STMT_SEARCH_ORDER_BOOKS
-	log.Println("Search:", query)
-
-	stmt, err := app.DB.Prepare(query)
-	if err != nil {
-		return nil, 0, err
-	}
-	rows, err := stmt.Query(queryTerms...)
 	if err != nil {
 		return nil, 0, err
 	}
 	defer rows.Close()
-	// FIXME factorize queryBooks
+	books := make([]*BookAdv, 0, limit)
+	count := 0
 	for rows.Next() {
 		if len(books) <= limit {
 			book := new(BookAdv)

bouquins/dbseries.go

@@ -1,7 +1,5 @@
 package bouquins
 
-import "log"
-
 // MERGE SUB QUERIES //
 
 func assignAuthorsSeries(series []*SeriesAdv, authors map[int64][]*Author) {
@@ -13,32 +11,13 @@ func assignAuthorsSeries(series []*SeriesAdv, authors map[int64][]*Author) {
 // SUB QUERIES //
 
 func (app *Bouquins) searchSeries(limit int, terms []string, all bool) ([]*SeriesAdv, int, error) {
-	series := make([]*SeriesAdv, 0, limit)
+	rows, err := app.searchHelper(all, terms, STMT_SERIES_SEARCH, STMT_SEARCH_TERM_SERIES, STMT_SEARCH_ORDER_SERIES)
-	count := 0
-	query := STMT_SERIES_SEARCH
-	queryTerms := make([]interface{}, 0, len(terms))
-	for i, term := range terms {
-		queryTerms = append(queryTerms, "%"+term+"%")
-		query += STMT_SEARCH_TERM_SERIES
-		if i < len(terms)-1 && all {
-			query += STMT_BOOL_AND
-		}
-		if i < len(terms)-1 && !all {
-			query += STMT_BOOL_OR
-		}
-	}
-	query += STMT_SEARCH_ORDER_SERIES
-	log.Println("Search:", query)
-
-	stmt, err := app.DB.Prepare(query)
-	if err != nil {
-		return nil, 0, err
-	}
-	rows, err := stmt.Query(queryTerms...)
 	if err != nil {
 		return nil, 0, err
 	}
 	defer rows.Close()
+	series := make([]*SeriesAdv, 0, limit)
+	count := 0
 	for rows.Next() {
 		if len(series) <= limit {
 			serie := new(SeriesAdv)

main.go

@@ -63,10 +63,7 @@ func initApp() *BouquinsConf {
 	if err != nil {
 		log.Fatalln(err)
 	}
-	app := &Bouquins{
+	app := &Bouquins{tpl, db}
-		tpl,
-		db,
-	}
 	err = app.PrepareAll()
 	if err != nil {
 		log.Fatalln(err)
@@ -83,13 +80,27 @@ func assets(calibre string) {
 	http.Handle(URL_CALIBRE, http.StripPrefix(URL_CALIBRE, http.FileServer(http.Dir(calibre))))
 }
 
+func handle(f func(res http.ResponseWriter, req *http.Request) error) func(res http.ResponseWriter, req *http.Request) {
+	return func(res http.ResponseWriter, req *http.Request) {
+		err := f(res, req)
+		if err != nil {
+			log.Println(err)
+			http.Error(res, err.Error(), 500)
+		}
+	}
+}
+
+func handleUrl(url string, f func(res http.ResponseWriter, req *http.Request) error) {
+	http.HandleFunc(url, handle(f))
+}
+
 func router(app *Bouquins) {
-	http.HandleFunc(URL_INDEX, app.IndexPage)
+	handleUrl(URL_INDEX, app.IndexPage)
-	http.HandleFunc(URL_BOOKS, app.BooksPage)
+	handleUrl(URL_BOOKS, app.BooksPage)
-	http.HandleFunc(URL_AUTHORS, app.AuthorsPage)
+	handleUrl(URL_AUTHORS, app.AuthorsPage)
-	http.HandleFunc(URL_SERIES, app.SeriesPage)
+	handleUrl(URL_SERIES, app.SeriesPage)
-	http.HandleFunc(URL_SEARCH, app.SearchPage)
+	handleUrl(URL_SEARCH, app.SearchPage)
-	http.HandleFunc(URL_ABOUT, app.AboutPage)
+	handleUrl(URL_ABOUT, app.AboutPage)
 }
 
 func main() {