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Parsing a TimeZone name string that includes GMT offset hours – Shopify

I did find this question but I am still stumbling around looking for a simple solution to the following:

An API call returns the following format which looks like they are using Time.zone.to_s 

irb> ShopifyAPI::Shop.current.timezone
=> "(GMT-08:00) Pacific Time (US & Canada)"

I would like to parse the "(GMT-08:00) Pacific Time (US & Canada)" into a Ruby class and output the TimeZone name "Pacific Time (US & Canada)"

Alternately I could just strip the "(GMT-08:00)" offset and be left with a clean TimeZone name "Pacific Time (US & Canada)" but this seems like a messy string editing solution.

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2

Answers


  1. 0

    If you are confident about the API and string format you are going to receive, you can manipulate string as

    string.partition(')').last.strip
# => Pacific Time (US & Canada)
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  2. 0

    ShopifyAPI::Shop.current returns properties documented here. Yes, timezone is one of them, but it is intended to be a display name, not something you should parse.

    Instead, use the iana_timezone property, which will give you the IANA time zone identifier, such as America/Los_Angeles. These are compatible with Rails, as well as Ruby’s tzinfo gem, and also are used in many other platforms.

    irb> ShopifyAPI::Shop.current.timezone
=> "(GMT-08:00) Pacific Time (US & Canada)"

irb> ShopifyAPI::Shop.current.iana_timezone
=> "America/Los_Angeles"

    If you want to get a Rails time zone from there, you can use the MAPPING constant defined in ActiveSupport::TimeZone. Though I’d avoid it if possible, for the reasons mentioned in the timezone tag wiki in the “Rails Time Zone Identifiers” section at the bottom.

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