Support for import/export of instance-level domain blocks/allows for 4.x w/ additional fixes (#20597)

* Allow import/export of instance-level domain blocks/allows (#1754)

* Allow import/export of instance-level domain blocks/allows.
Fixes #15095

* Pacify circleci

* Address simple code review feedback

* Add headers to exported CSV

* Extract common import/export functionality to
AdminExportControllerConcern

* Add additional fields to instance-blocked domain export

* Address review feedback

* Split instance domain block/allow import/export into separate pages/controllers

* Address code review feedback

* Pacify DeepSource

* Work around Paperclip::HasAttachmentFile for Rails 6

* Fix deprecated API warning in export tests

* Remove after_commit workaround

(cherry picked from commit 94e98864e3)

* Add confirmation page when importing blocked domains (#1773)

* Move glitch-soc-specific strings to glitch-soc-specific locale files

* Add confirmation page when importing blocked domains

(cherry picked from commit b91196f4b7)

* Fix authorization check in domain blocks controller

(cherry picked from commit 7527937758)

* Fix error strings for domain blocks and email-domain blocks

Corrected issue with non-error message used for Mastodon:NotPermittedError in Domain Blocks
Corrected issue Domain Blocks using the Email Domain Blocks message on ActionContoller::ParameterMissing
Corrected issue with Email Domain Blocks using the not_permitted string from "custom emojii's"

* Ran i18n-tasks normalize to address test failure

* Removed unused admin.export_domain_blocks.not_permitted string

Removing unused string as indicated by Check i18n

* Fix tests

(cherry picked from commit 9094c2f52c)

* Fix domain block export not exporting blocks with only media rejection

(cherry picked from commit 26ff48ee48)

* Fix various issues with domain block import

- stop using Paperclip for processing domain allow/block imports
- stop leaving temporary files
- better error handling
- assume CSV files are UTF-8-encoded

(cherry picked from commit cad824d8f501b95377e4f0a957e5a00d517a1902)

Co-authored-by: Levi Bard <taktaktaktaktaktaktaktaktaktak@gmail.com>
Co-authored-by: Claire <claire.github-309c@sitedethib.com>

config/locales/en.yml

@@ -373,6 +373,8 @@ en:
       add_new: Allow federation with domain
       created_msg: Domain has been successfully allowed for federation
       destroyed_msg: Domain has been disallowed from federation
+      export: Export
+      import: Import
       undo: Disallow federation with domain
     domain_blocks:
       add_new: Add new domain block
@@ -382,6 +384,8 @@ en:
       edit: Edit domain block
       existing_domain_block: You have already imposed stricter limits on %{name}.
       existing_domain_block_html: You have already imposed stricter limits on %{name}, you need to <a href="%{unblock_url}">unblock it</a> first.
+      export: Export
+      import: Import
       new:
         create: Create block
         hint: The domain block will not prevent creation of account entries in the database, but will retroactively and automatically apply specific moderation methods on those accounts.
@@ -391,6 +395,8 @@ en:
           silence: Limit
           suspend: Suspend
         title: New domain block
+      no_domain_block_selected: No domain blocks were changed as none were selected
+      not_permitted: You are not permitted to perform this action
       obfuscate: Obfuscate domain name
       obfuscate_hint: Partially obfuscate the domain name in the list if advertising the list of domain limitations is enabled
       private_comment: Private comment
@@ -422,6 +428,20 @@ en:
       resolved_dns_records_hint_html: The domain name resolves to the following MX domains, which are ultimately responsible for accepting e-mail. Blocking an MX domain will block sign-ups from any e-mail address which uses the same MX domain, even if the visible domain name is different. <strong>Be careful not to block major e-mail providers.</strong>
       resolved_through_html: Resolved through %{domain}
       title: Blocked e-mail domains
+    export_domain_allows:
+      new:
+        title: Import domain allows
+      no_file: No file selected
+    export_domain_blocks:
+      import:
+        description_html: You are about to import a list of domain blocks. Please review this list very carefully, especially if you have not authored this list yourself.
+        existing_relationships_warning: Existing follow relationships
+        private_comment_description_html: 'To help you track where imported blocks come from, imported blocks will be created with the following private comment: <q>%{comment}</q>'
+        private_comment_template: Imported from %{source} on %{date}
+        title: Import domain blocks
+      new:
+        title: Import domain blocks
+      no_file: No file selected
     follow_recommendations:
       description_html: "<strong>Follow recommendations help new users quickly find interesting content</strong>. When a user has not interacted with others enough to form personalized follow recommendations, these accounts are recommended instead. They are re-calculated on a daily basis from a mix of accounts with the highest recent engagements and highest local follower counts for a given language."
       language: For language
@@ -1159,6 +1179,7 @@ en:
     invalid_markup: 'contains invalid HTML markup: %{error}'
   imports:
     errors:
+      invalid_csv_file: 'Invalid CSV file. Error: %{error}'
       over_rows_processing_limit: contains more than %{count} rows
     modes:
       merge: Merge