tandem/camper
tandem
/
camper
2
0
Fork 0
Code Issues 7 Pull Requests Packages Projects Releases Wiki Activity
camper/pkg/locale/locale.go

111 lines
2.3 KiB
Go
Raw Normal View History

Add the skeleton of the web application It does nothing more than to server a single page that does nothing interesting. This time i do not use a router. Instead, i am trying out a technique i have seen in an article[0] that i have tried in other, smaller, projects and seems to work surprisingly well: it just “cuts off” the URI path by path, passing the request from handler to handler until it finds its way to a handler that actually serves the request. That helps to loosen the coupling between the application and lower handlers, and makes dependencies explicit, because i need to pass the locale, company, etc. down instead of storing them in contexts. Let’s see if i do not regret it on a later date. I also made a lot more packages that in Numerus. In Numerus i actually only have the single pkg package, and it works, kind of, but i notice how i name my methods to avoid clashing instead of using packages for that. That is, instead of pkg.NewApp i now have app.New. Initially i thought that Locale should be inside app, but then there was a circular dependency between app and template. That is why i created a separate package, but now i am wondering if template should be inside app too, but then i would have app.MustRenderTemplate instead of template.MustRender. The CSS is the most bare-bones file i could write because i am focusing in markup right now; Oriol will fill in the file once the application is working. [0]: https://blog.merovius.de/posts/2017-06-18-how-not-to-use-an-http-router/
2023-07-22 22:11:00 +00:00
/*
* SPDX-FileCopyrightText: 2023 jordi fita mas <jfita@peritasoft.com>
* SPDX-License-Identifier: AGPL-3.0-only
*/
package locale
import (
"context"
"github.com/leonelquinteros/gotext"
"golang.org/x/text/language"
"dev.tandem.ws/tandem/camper/pkg/database"
)
type Locale struct {
*gotext.Locale
CurrencyPattern string
Language language.Tag
}
type Locales map[language.Tag]*Locale
func (m Locales) Tags() []language.Tag {
keys := make([]language.Tag, len(m))
i := 0
for k := range m {
keys[i] = k
i++
}
return keys
}
func MustGetAll(db *database.DB) Locales {
availableLanguages := mustGetAvailableLanguages(db)
locales := map[language.Tag]*Locale{}
for _, lang := range availableLanguages {
locale := newLocale(lang)
locale.AddDomain("camper")
locales[lang.tag] = locale
}
return locales
}
func newLocale(lang availableLanguage) *Locale {
return &Locale{
gotext.NewLocale("locale", lang.tag.String()),
lang.currencyPattern,
lang.tag,
}
}
Add Gettext and GettextNoop to locale xgettext does not recognize Get as marker for translatable strings, and i can not add it as is because Go has many functions called Get, and it would mark many strings as translatable that should not be, like HTTP headers. I believe that Gettext is unusual in Go, because the “correct” way to spell that function in Go would be GetText, and would not interfere in any other function. GettextNoop is just a function that marks the string as translatable but does not translate it at all. I want this for error messages and such, that i have to pass the string to a validator function, but it is only necessary to translate it when the validation fails. I doubt it makes a difference in peformance, but still.
2023-07-24 15:09:43 +00:00
func (l *Locale) Gettext(str string) string {
return l.GetD(l.GetDomain(), str)
}
Add profile form, inside a user menu This is the first form that uses HTMx, and can not return a 400 error code because otherwise HTMx does not render the content. Since now there are pages that do not render the whole html, with header and body, i need a different layout for these, and moved the common code to handle forms and such a new template file that both layouts can use. I also need the request in template.MustRender to check which layout i should use. Closes #7.
2023-07-26 18:46:09 +00:00
func (l *Locale) Pgettext(str string, ctx string) string {
return l.GetDC(l.GetDomain(), str, ctx)
}
Add Gettext and GettextNoop to locale xgettext does not recognize Get as marker for translatable strings, and i can not add it as is because Go has many functions called Get, and it would mark many strings as translatable that should not be, like HTTP headers. I believe that Gettext is unusual in Go, because the “correct” way to spell that function in Go would be GetText, and would not interfere in any other function. GettextNoop is just a function that marks the string as translatable but does not translate it at all. I want this for error messages and such, that i have to pass the string to a validator function, but it is only necessary to translate it when the validation fails. I doubt it makes a difference in peformance, but still.
2023-07-24 15:09:43 +00:00
func (l *Locale) GettextNoop(str string) string {
return str
}
Get user from database based on cookie and serve login if not logged in To get the user from the database i have to set the cookie first, that was already done in database.MustAcquire, but i thought they were too far apart, even thought they are so related. So, the cookie, and thus the role, is set when getting the user, that is actually the first thing to do once the connection is acquired. However, that way the database package has no knowledge of cookies, and the code that sets the cookie and retrieves the user are next to each other. I applied the same logic to the changes of locale.Match: it has not business knowing that the accept language string comes from a request; it only needs the actual string. Also, the TODO comment about getting the user’s locale made no sense, now, because app already knows that locale, so there is no need to pass the user to the locale package. Getting the locale is done after retrieving the user from the database, for the same reason the connection is Acquired as far up as possible: almost every request will need this value, together with the user and the database connection. I am a bit affraid that i will end up with functions that always expect these three values. Maybe i can put the locale inside user, as it is the user’s locale, after all, no matter if it came from the database or the user agent, but connection and user must be separate, i think. We’ll see.
2023-07-25 23:50:39 +00:00
func Match(acceptLanguage string, locales Locales, matcher language.Matcher) *Locale {
t, _, err := language.ParseAcceptLanguage(acceptLanguage)
if err != nil {
return nil
Add the skeleton of the web application It does nothing more than to server a single page that does nothing interesting. This time i do not use a router. Instead, i am trying out a technique i have seen in an article[0] that i have tried in other, smaller, projects and seems to work surprisingly well: it just “cuts off” the URI path by path, passing the request from handler to handler until it finds its way to a handler that actually serves the request. That helps to loosen the coupling between the application and lower handlers, and makes dependencies explicit, because i need to pass the locale, company, etc. down instead of storing them in contexts. Let’s see if i do not regret it on a later date. I also made a lot more packages that in Numerus. In Numerus i actually only have the single pkg package, and it works, kind of, but i notice how i name my methods to avoid clashing instead of using packages for that. That is, instead of pkg.NewApp i now have app.New. Initially i thought that Locale should be inside app, but then there was a circular dependency between app and template. That is why i created a separate package, but now i am wondering if template should be inside app too, but then i would have app.MustRenderTemplate instead of template.MustRender. The CSS is the most bare-bones file i could write because i am focusing in markup right now; Oriol will fill in the file once the application is working. [0]: https://blog.merovius.de/posts/2017-06-18-how-not-to-use-an-http-router/
2023-07-22 22:11:00 +00:00
}
Get user from database based on cookie and serve login if not logged in To get the user from the database i have to set the cookie first, that was already done in database.MustAcquire, but i thought they were too far apart, even thought they are so related. So, the cookie, and thus the role, is set when getting the user, that is actually the first thing to do once the connection is acquired. However, that way the database package has no knowledge of cookies, and the code that sets the cookie and retrieves the user are next to each other. I applied the same logic to the changes of locale.Match: it has not business knowing that the accept language string comes from a request; it only needs the actual string. Also, the TODO comment about getting the user’s locale made no sense, now, because app already knows that locale, so there is no need to pass the user to the locale package. Getting the locale is done after retrieving the user from the database, for the same reason the connection is Acquired as far up as possible: almost every request will need this value, together with the user and the database connection. I am a bit affraid that i will end up with functions that always expect these three values. Maybe i can put the locale inside user, as it is the user’s locale, after all, no matter if it came from the database or the user agent, but connection and user must be separate, i think. We’ll see.
2023-07-25 23:50:39 +00:00
var locale *Locale
Take into account the confidence of language.Matcher I had a weird but that sometimes the application would use Spanish as the default language, even though the user had not passed Spanish as value of the Accept-Language header and the default is hard-coded to Catalan. I learned that language.Matcher **always** returns one of its defined locales, even if there is no way to match the passed list of languages to Match. In that case, it returns a confidence of “No”, meaning that the match failed. Usually go the default Catalan locale because most of the time this was set as the first language to Matcher, but since Go randomizes maps, there were times that Spanish was first.
2023-08-05 00:08:32 +00:00
tag, _, confidence := matcher.Match(t...)
if confidence > language.No {
var ok bool
Get user from database based on cookie and serve login if not logged in To get the user from the database i have to set the cookie first, that was already done in database.MustAcquire, but i thought they were too far apart, even thought they are so related. So, the cookie, and thus the role, is set when getting the user, that is actually the first thing to do once the connection is acquired. However, that way the database package has no knowledge of cookies, and the code that sets the cookie and retrieves the user are next to each other. I applied the same logic to the changes of locale.Match: it has not business knowing that the accept language string comes from a request; it only needs the actual string. Also, the TODO comment about getting the user’s locale made no sense, now, because app already knows that locale, so there is no need to pass the user to the locale package. Getting the locale is done after retrieving the user from the database, for the same reason the connection is Acquired as far up as possible: almost every request will need this value, together with the user and the database connection. I am a bit affraid that i will end up with functions that always expect these three values. Maybe i can put the locale inside user, as it is the user’s locale, after all, no matter if it came from the database or the user agent, but connection and user must be separate, i think. We’ll see.
2023-07-25 23:50:39 +00:00
locale, ok = locales[tag]
Take into account the confidence of language.Matcher I had a weird but that sometimes the application would use Spanish as the default language, even though the user had not passed Spanish as value of the Accept-Language header and the default is hard-coded to Catalan. I learned that language.Matcher **always** returns one of its defined locales, even if there is no way to match the passed list of languages to Match. In that case, it returns a confidence of “No”, meaning that the match failed. Usually go the default Catalan locale because most of the time this was set as the first language to Matcher, but since Go randomizes maps, there were times that Spanish was first.
2023-08-05 00:08:32 +00:00
for !ok && !tag.IsRoot() {
tag = tag.Parent()
locale, ok = locales[tag]
}
Add the skeleton of the web application It does nothing more than to server a single page that does nothing interesting. This time i do not use a router. Instead, i am trying out a technique i have seen in an article[0] that i have tried in other, smaller, projects and seems to work surprisingly well: it just “cuts off” the URI path by path, passing the request from handler to handler until it finds its way to a handler that actually serves the request. That helps to loosen the coupling between the application and lower handlers, and makes dependencies explicit, because i need to pass the locale, company, etc. down instead of storing them in contexts. Let’s see if i do not regret it on a later date. I also made a lot more packages that in Numerus. In Numerus i actually only have the single pkg package, and it works, kind of, but i notice how i name my methods to avoid clashing instead of using packages for that. That is, instead of pkg.NewApp i now have app.New. Initially i thought that Locale should be inside app, but then there was a circular dependency between app and template. That is why i created a separate package, but now i am wondering if template should be inside app too, but then i would have app.MustRenderTemplate instead of template.MustRender. The CSS is the most bare-bones file i could write because i am focusing in markup right now; Oriol will fill in the file once the application is working. [0]: https://blog.merovius.de/posts/2017-06-18-how-not-to-use-an-http-router/
2023-07-22 22:11:00 +00:00
}
return locale
}
type availableLanguage struct {
tag language.Tag
currencyPattern string
}
func mustGetAvailableLanguages(db *database.DB) []availableLanguage {
rows, err := db.Query(context.Background(), "select lang_tag, currency_pattern from language where selectable")
if err != nil {
panic(err)
}
defer rows.Close()
var languages []availableLanguage
for rows.Next() {
var langTag string
var currencyPattern string
err = rows.Scan(&langTag, &currencyPattern)
if err != nil {
panic(err)
}
languages = append(languages, availableLanguage{language.MustParse(langTag), currencyPattern})
}
if rows.Err() != nil {
panic(rows.Err())
}
return languages
}