Convert react-intl's plural syntax to PO format plural syntax

[Sand1929]

React-intl uses the ICU message syntax, which means that if you want to specify different translations for different plural forms, it looks something like this:

You have {itemCount} {itemCount, plural, one {item} other {items}}.

(See https://formatjs.io/guides/message-syntax/#plural-format)

When converted into PO format using react-intl-po, it currently looks like this:

msgid "You have {itemCount} {itemCount, plural, one {item} other {items}}"

However, in PO format, plural forms are supposed to be specified like this:

msgid "You have %1 item"
msgid_plural "You have %1 items"
msgstr[0] ""
msgstr[1] ""

(And you can specify msgstr[2] and so on for languages with more than 2 plural forms. See http://pology.nedohodnik.net/doc/user/en_US/ch-poformat.html)

This issue also applies to translations with ordinal numbers, for which react-intl uses ICU's selectordinal. This could also be converted to PO format. However, I propose we limit the scope of this issue to translating cardinal plurals (i.e., plurals like the example above, where react-intl uses the plural keyword). That being said, any solution we come up with should probably keep in mind that we'll want to translate selectordinal as well. I'm happy to take lead on this and come up with a PR. Let me know your thoughts!

[evenchange4]

It will be great to handle the plural use case, but I have no time to dive into it. I am happy to see a PR for this feature. 😍

Sand1929 notifications@github.com於 2017年11月23日 週四，20:14寫道：

React-intl uses the ICU message syntax, which means that if you want to specify different translations for different plural forms, it looks something like this:

You have {itemCount} {itemCount, plural, one {item} other {items}}.

(See https://formatjs.io/guides/message-syntax/#plural-format)

When converted into PO format using react-intl-po, it currently looks like this:

msgid "You have {itemCount} {itemCount, plural, one {item} other {items}}"

However, in PO format, plural forms are supposed to be specified like this:

msgid "You have %1 item" msgid_plural "You have %1 items" msgstr[0] "" msgstr[1] ""

(And you can specify msgstr[2] and so on for languages with more than 2 plural forms. See http://pology.nedohodnik.net/doc/user/en_US/ch-poformat.html)

This issue also applies to translations with ordinal numbers, for which react-intl uses ICU's selectordinal. This could also be converted to PO format. However, I propose we limit the scope of this issue to translating cardinal plurals (i.e., plurals like the example above, where react-intl uses the plural keyword). That being said, any solution we come up with should probably keep in mind that we'll want to translate selectordinal as well. I'm happy to take lead on this and come up with a PR. Let me know your thoughts!

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Best,

============================== Michael Hsu