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package dns
import (
"database/sql"
"fmt"
"log"
"net/http"
"strconv"
"strings"
"git.hatecomputers.club/hatecomputers/hatecomputers.club/adapters"
"git.hatecomputers.club/hatecomputers/hatecomputers.club/api/types"
"git.hatecomputers.club/hatecomputers/hatecomputers.club/database"
"git.hatecomputers.club/hatecomputers/hatecomputers.club/utils"
)
const MAX_USER_RECORDS = 65
var USER_OWNED_INTERNAL_FMT_DOMAINS = []string{"%s", "%s.endpoints"}
func userCanFuckWithDNSRecord(dbConn *sql.DB, user *database.User, record *database.DNSRecord, ownedInternalDomainFormats []string) bool {
ownedByUser := (user.ID == record.UserID)
if !ownedByUser {
return false
}
if !record.Internal {
for _, format := range ownedInternalDomainFormats {
domain := fmt.Sprintf(format, user.Username)
isInSubDomain := strings.HasSuffix(record.Name, "."+domain)
if domain == record.Name || isInSubDomain {
return true
}
}
return false
}
owner, err := database.FindFirstDomainOwnerId(dbConn, record.Name)
if err != nil {
log.Println(err)
return false
}
userIsOwnerOfDomain := owner == user.ID
return ownedByUser && userIsOwnerOfDomain
}
func ListDNSRecordsContinuation(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
return func(success types.Continuation, failure types.Continuation) types.ContinuationChain {
dnsRecords, err := database.GetUserDNSRecords(context.DBConn, context.User.ID)
if err != nil {
log.Println(err)
resp.WriteHeader(http.StatusInternalServerError)
return failure(context, req, resp)
}
(*context.TemplateData)["DNSRecords"] = dnsRecords
return success(context, req, resp)
}
}
func CreateDNSRecordContinuation(dnsAdapter external_dns.ExternalDNSAdapter) func(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
return func(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
return func(success types.Continuation, failure types.Continuation) types.ContinuationChain {
formErrors := types.FormError{
Errors: []string{},
}
internal := req.FormValue("internal") == "on"
name := req.FormValue("name")
if internal && !strings.HasSuffix(name, ".") {
name += "."
}
recordType := req.FormValue("type")
recordType = strings.ToUpper(recordType)
recordContent := req.FormValue("content")
ttl := req.FormValue("ttl")
ttlNum, err := strconv.Atoi(ttl)
if err != nil {
formErrors.Errors = append(formErrors.Errors, "invalid ttl")
}
dnsRecordCount, err := database.CountUserDNSRecords(context.DBConn, context.User.ID)
if err != nil {
log.Println(err)
resp.WriteHeader(http.StatusInternalServerError)
return failure(context, req, resp)
}
if dnsRecordCount >= MAX_USER_RECORDS {
formErrors.Errors = append(formErrors.Errors, "max records reached")
}
dnsRecord := &database.DNSRecord{
UserID: context.User.ID,
Name: name,
Type: recordType,
Content: recordContent,
TTL: ttlNum,
Internal: internal,
}
if !userCanFuckWithDNSRecord(context.DBConn, context.User, dnsRecord, USER_OWNED_INTERNAL_FMT_DOMAINS) {
formErrors.Errors = append(formErrors.Errors, "'name' must end with "+context.User.Username+" or you must be a domain owner for internal domains")
}
if len(formErrors.Errors) == 0 {
if dnsRecord.Internal {
dnsRecord.ID = utils.RandomId()
} else {
dnsRecord.ID, err = dnsAdapter.CreateDNSRecord(dnsRecord)
if err != nil {
log.Println(err)
formErrors.Errors = append(formErrors.Errors, err.Error())
}
}
}
if len(formErrors.Errors) == 0 {
_, err := database.SaveDNSRecord(context.DBConn, dnsRecord)
if err != nil {
log.Println(err)
formErrors.Errors = append(formErrors.Errors, "error saving record")
}
}
if len(formErrors.Errors) == 0 {
http.Redirect(resp, req, "/dns", http.StatusFound)
return success(context, req, resp)
}
(*context.TemplateData)["FormError"] = &formErrors
(*context.TemplateData)["RecordForm"] = dnsRecord
resp.WriteHeader(http.StatusBadRequest)
return failure(context, req, resp)
}
}
}
func DeleteDNSRecordContinuation(dnsAdapter external_dns.ExternalDNSAdapter) func(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
return func(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
return func(success types.Continuation, failure types.Continuation) types.ContinuationChain {
recordId := req.FormValue("id")
record, err := database.GetDNSRecord(context.DBConn, recordId)
if err != nil {
log.Println(err)
resp.WriteHeader(http.StatusInternalServerError)
return failure(context, req, resp)
}
if !userCanFuckWithDNSRecord(context.DBConn, context.User, record, USER_OWNED_INTERNAL_FMT_DOMAINS) {
resp.WriteHeader(http.StatusUnauthorized)
return failure(context, req, resp)
}
if !record.Internal {
err = dnsAdapter.DeleteDNSRecord(recordId)
if err != nil {
log.Println(err)
resp.WriteHeader(http.StatusInternalServerError)
return failure(context, req, resp)
}
}
err = database.DeleteDNSRecord(context.DBConn, recordId)
if err != nil {
resp.WriteHeader(http.StatusInternalServerError)
return failure(context, req, resp)
}
http.Redirect(resp, req, "/dns", http.StatusFound)
return success(context, req, resp)
}
}
}
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