[feature] Create/update/remove domain permission subscriptions (#3623)

* [feature] Create/update/remove domain permission subscriptions

* lint

* envparsing

* remove errant fmt.Println

* create drafts, subs, exclude, from snapshot models

* name etag column correctly

* remove count column

* lint

1 files changed, 74 insertions, 0 deletions

diff --git a/internal/gtsmodel/domainpermissionsubscription.go b/internal/gtsmodel/domainpermissionsubscription.go
new file mode 100644
index 000000000..b6a0b8f43
--- /dev/null
+++ b/internal/gtsmodel/domainpermissionsubscription.go
@@ -0,0 +1,74 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package gtsmodel
+
+import "time"
+
+type DomainPermissionSubscription struct {
+	ID                    string                   `bun:"type:CHAR(26),pk,nullzero,notnull,unique"` // ID of this item in the database.
+	Priority              uint8                    `bun:""`                                         // Priority of this subscription compared to others of the same permission type. 0-255 (higher = higher priority).
+	Title                 string                   `bun:",nullzero,unique"`                         // Moderator-set title for this list.
+	PermissionType        DomainPermissionType     `bun:",nullzero,notnull"`                        // Permission type of the subscription.
+	AsDraft               *bool                    `bun:",nullzero,notnull,default:true"`           // Create domain permission entries resulting from this subscription as drafts.
+	AdoptOrphans          *bool                    `bun:",nullzero,notnull,default:false"`          // Adopt orphaned domain permissions present in this subscription's entries.
+	CreatedByAccountID    string                   `bun:"type:CHAR(26),nullzero,notnull"`           // Account ID of the creator of this subscription.
+	CreatedByAccount      *Account                 `bun:"-"`                                        // Account corresponding to createdByAccountID.
+	URI                   string                   `bun:",nullzero,notnull,unique"`                 // URI of the domain permission list.
+	ContentType           DomainPermSubContentType `bun:",nullzero,notnull"`                        // Content type to expect from the URI.
+	FetchUsername         string                   `bun:",nullzero"`                                // Username to send when doing a GET of URI using basic auth.
+	FetchPassword         string                   `bun:",nullzero"`                                // Password to send when doing a GET of URI using basic auth.
+	FetchedAt             time.Time                `bun:"type:timestamptz,nullzero"`                // Time when fetch of URI was last attempted.
+	SuccessfullyFetchedAt time.Time                `bun:"type:timestamptz,nullzero"`                // Time when the domain permission list was last *successfuly* fetched, to be transmitted as If-Modified-Since header.
+	ETag                  string                   `bun:"etag,nullzero"`                            // Etag last received from the server (if any) on successful fetch.
+	Error                 string                   `bun:",nullzero"`                                // If latest fetch attempt errored, this field stores the error message. Cleared on latest successful fetch.
+}
+
+type DomainPermSubContentType enumType
+
+const (
+	DomainPermSubContentTypeUnknown DomainPermSubContentType = 0 // ???
+	DomainPermSubContentTypeCSV     DomainPermSubContentType = 1 // text/csv
+	DomainPermSubContentTypeJSON    DomainPermSubContentType = 2 // application/json
+	DomainPermSubContentTypePlain   DomainPermSubContentType = 3 // text/plain
+)
+
+func (p DomainPermSubContentType) String() string {
+	switch p {
+	case DomainPermSubContentTypeCSV:
+		return "text/csv"
+	case DomainPermSubContentTypeJSON:
+		return "application/json"
+	case DomainPermSubContentTypePlain:
+		return "text/plain"
+	default:
+		panic("unknown content type")
+	}
+}
+
+func NewDomainPermSubContentType(in string) DomainPermSubContentType {
+	switch in {
+	case "text/csv":
+		return DomainPermSubContentTypeCSV
+	case "application/json":
+		return DomainPermSubContentTypeJSON
+	case "text/plain":
+		return DomainPermSubContentTypePlain
+	default:
+		return DomainPermSubContentTypeUnknown
+	}
+}