move + restructure processor

internal/db/db.go

@@ -65,11 +65,6 @@ type DB interface {
 	// In case of no entries, a 'no entries' error will be returned
 	GetWhere(where []Where, i interface{}) error
 
-	// // GetWhereMany gets one entry where key = value for *ALL* parameters passed as "where".
-	// // That is, if you pass 2 'where' entries, with 1 being Key username and Value test, and the second
-	// // being Key domain and Value example.org, only entries will be returned where BOTH conditions are true.
-	// GetWhereMany(i interface{}, where ...model.Where) error
-
 	// GetAll will try to get all entries of type i.
 	// The given interface i will be set to the result of the query, whatever it is. Use a pointer or a slice.
 	// In case of no entries, a 'no entries' error will be returned
@@ -261,6 +256,10 @@ type DB interface {
 
 	// GetDomainCountForInstance returns the number of known instances known that the given domain federates with.
 	GetDomainCountForInstance(domain string) (int, error)
+
+	// GetAccountsForInstance returns a slice of accounts from the given instance, arranged by ID.
+	GetAccountsForInstance(domain string, maxID string, limit int) ([]*gtsmodel.Account, error)
+
 	/*
 		USEFUL CONVERSION FUNCTIONS
 	*/

internal/db/pg/instance.go

@@ -2,6 +2,7 @@ package pg
 
 import (
 	"github.com/go-pg/pg/v10"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 )
 
@@ -50,3 +51,31 @@ func (ps *postgresService) GetDomainCountForInstance(domain string) (int, error)
 
 	return q.Count()
 }
+
+func (ps *postgresService) GetAccountsForInstance(domain string, maxID string, limit int) ([]*gtsmodel.Account, error) {
+	accounts := []*gtsmodel.Account{}
+
+	q := ps.conn.Model(&accounts).Where("domain = ?", domain).Order("id DESC")
+
+	if maxID != "" {
+		q = q.Where("id < ?", maxID)
+	}
+
+	if limit > 0 {
+		q = q.Limit(limit)
+	}
+
+	err := q.Select()
+	if err != nil {
+		if err == pg.ErrNoRows {
+			return nil, db.ErrNoEntries{}
+		}
+		return nil, err
+	}
+
+	if len(accounts) == 0 {
+		return nil, db.ErrNoEntries{}
+	}
+
+	return accounts, nil
+}