Inject ngettext into Tera templates

Fix .po updating (without the -U option, the result was written to stdout, not the .po file)

build.rs

@@ -17,6 +17,7 @@ fn update_po() {
             println!("Updating {}", lang.clone());
             // Update it
             Command::new("msgmerge")
+                .arg("-U")
                 .arg(po_path.to_str().unwrap())
                 .arg(pot_path.to_str().unwrap())
                 .spawn()

po/en.po

@@ -14,3 +14,8 @@ msgstr ""
 
 msgid "Welcome on {{ instance_name }}"
 msgstr "Welcome on {{ instance_name }}"
+
+msgid "One follower"
+msgid_plural "{{ count }} followers"
+msgstr[0] "One follower"
+msgstr[1] "{{ count }} followers"

po/en.po~

@@ -0,0 +1,16 @@
+msgid ""
+msgstr ""
+"Project-Id-Version: plume\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-06-15 16:33-0700\n"
+"PO-Revision-Date: 2018-06-15 16:33-0700\n"
+"Last-Translator: Automatically generated\n"
+"Language-Team: none\n"
+"Language: en\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+msgid "Welcome on {{ instance_name }}"
+msgstr "Welcome on {{ instance_name }}"

po/fr.po

@@ -14,3 +14,8 @@ msgstr ""
 
 msgid "Welcome on {{ instance_name }}"
 msgstr "Bienvenue sur {{ instance_name }}"
+
+msgid "One follower"
+msgid_plural "{{ count }} followers"
+msgstr[0] "{{ count }} abonné⋅e"
+msgstr[1] "{{ count }} abonné⋅e⋅s"

po/fr.po~

@@ -0,0 +1,16 @@
+msgid ""
+msgstr ""
+"Project-Id-Version: plume\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-06-15 16:33-0700\n"
+"PO-Revision-Date: 2018-06-15 16:33-0700\n"
+"Last-Translator: Automatically generated\n"
+"Language-Team: none\n"
+"Language: fr\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n > 1);\n"
+
+msgid "Welcome on {{ instance_name }}"
+msgstr "Bienvenue sur {{ instance_name }}"

po/plume.pot

@@ -14,3 +14,8 @@ msgstr ""
 
 msgid "Welcome on {{ instance_name }}"
 msgstr ""
+
+msgid "One follower"
+msgid_plural "{{ count }} followers"
+msgstr[0] ""
+msgstr[1] ""

src/i18n.rs

@@ -58,6 +58,16 @@ fn tera_gettext(msg: serde_json::Value, ctx: HashMap<String, serde_json::Value>)
     Ok(serde_json::Value::String(Tera::one_off(trans.as_ref(), &ctx, false).unwrap_or(String::from(""))))
 }
 
-pub fn tera(t: &mut Tera) {
-    t.register_filter("_", tera_gettext)
+fn tera_ngettext(msg: serde_json::Value, ctx: HashMap<String, serde_json::Value>) -> Result<serde_json::Value, TeraError> {
+    let trans = ngettext(
+        ctx.get("singular").unwrap().as_str().unwrap(),
+        msg.as_str().unwrap(),
+        ctx.get("count").unwrap().as_u64().unwrap() as u32
+    );
+    Ok(serde_json::Value::String(Tera::one_off(trans.as_ref(), &ctx, false).unwrap_or(String::from(""))))
+}
+
+pub fn tera(t: &mut Tera) {
+    t.register_filter("_", tera_gettext);
+    t.register_filter("_n", tera_ngettext);
 }

templates/users/details.html.tera

@@ -42,7 +42,7 @@
     </div>
 
     <div>
-        <a href="followers/">{{ n_followers }} follower{{ n_followers | pluralize }}</a>
+        <a href="followers/">{{ "{{ count }} followers" | _n(singular="One follower", count=n_followers) }}</a>
     </div>
 
     <div>