Domain block (#76)

* start work on admin domain blocking

* move stuff around + further work on domain blocks

* move + restructure processor

* prep work for deleting account

* tidy

* go fmt

* formatting

* domain blocking more work

* check domain blocks way earlier on

* progress on delete account

* delete more stuff when an account is gone

* and more...

* domain blocky block block

* get individual domain block, delete a block

internal/api/client/admin/domainblockget.go

@@ -0,0 +1,60 @@
+package admin
+
+import (
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// DomainBlockGETHandler returns one existing domain block, identified by its id.
+func (m *Module) DomainBlockGETHandler(c *gin.Context) {
+	l := m.log.WithFields(logrus.Fields{
+		"func":        "DomainBlockGETHandler",
+		"request_uri": c.Request.RequestURI,
+		"user_agent":  c.Request.UserAgent(),
+		"origin_ip":   c.ClientIP(),
+	})
+
+	// make sure we're authed with an admin account
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		l.Debugf("couldn't auth: %s", err)
+		c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
+		return
+	}
+	if !authed.User.Admin {
+		l.Debugf("user %s not an admin", authed.User.ID)
+		c.JSON(http.StatusForbidden, gin.H{"error": "not an admin"})
+		return
+	}
+
+	domainBlockID := c.Param(IDKey)
+	if domainBlockID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no domain block id provided"})
+		return
+	}
+
+	export := false
+	exportString := c.Query(ExportQueryKey)
+	if exportString != "" {
+		i, err := strconv.ParseBool(exportString)
+		if err != nil {
+			l.Debugf("error parsing export string: %s", err)
+			c.JSON(http.StatusBadRequest, gin.H{"error": "couldn't parse export query param"})
+			return
+		}
+		export = i
+	}
+
+	domainBlock, err := m.processor.AdminDomainBlockGet(authed, domainBlockID, export)
+	if err != nil {
+		l.Debugf("error getting domain block: %s", err)
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, domainBlock)
+}