func MakeBarcode(rw http.ResponseWriter, req *http.Request) {
var id = req.FormValue("id")
var bigint *big.Int = big.NewInt(0)
var code barcode.Barcode
var uuid cassandra.UUID
var err error
if id == "" {
http.NotFound(rw, req)
return
}
uuid, err = cassandra.ParseUUID(id)
if err != nil {
log.Print("Error parsing UUID: ", err)
rw.WriteHeader(http.StatusInternalServerError)
rw.Write([]byte("Error parsing UUID: " + err.Error()))
return
}
bigint.SetBytes([]byte(uuid))
id = bigint.String()
code, err = code128.Encode(id)
if err != nil {
log.Print("Error generating barcode: ", err)
rw.WriteHeader(http.StatusInternalServerError)
rw.Write([]byte("Error generating barcode: " + err.Error()))
return
}
code, err = barcode.Scale(code, code.Bounds().Max.X, 24*code.Bounds().Max.Y)
if err != nil {
log.Print("Error scaling barcode: ", err)
rw.WriteHeader(http.StatusInternalServerError)
rw.Write([]byte("Error scaling barcode: " + err.Error()))
return
}
rw.Header().Set("Content-Type", "image/png")
rw.Header().Set("Content-Disposition", "inline; filename="+uuid.String()+".png")
err = png.Encode(rw, code)
if err != nil {
log.Print("Error writing out image: ", err)
rw.Header().Set("Content-Type", "text/plain; charset=utf8")
rw.Header().Set("Content-Disposition", "inline")
rw.Write([]byte("Error writing out image: " + err.Error()))
}
}
// Get a list of all members which are currently in the trash.
func (m *MembershipDB) EnumerateTrashedMembers(prev string, num int32) ([]*MemberWithKey, error) {
var cp *cassandra.ColumnParent = cassandra.NewColumnParent()
var pred *cassandra.SlicePredicate = cassandra.NewSlicePredicate()
var r *cassandra.KeyRange = cassandra.NewKeyRange()
var kss []*cassandra.KeySlice
var ks *cassandra.KeySlice
var rv []*MemberWithKey
var err error
// Fetch the protobuf column of the application column family.
cp.ColumnFamily = "membership_archive"
pred.ColumnNames = [][]byte{
[]byte("pb_data"),
}
if len(prev) > 0 {
var uuid cassandra.UUID
if uuid, err = cassandra.ParseUUID(prev); err != nil {
return rv, err
}
r.StartKey = append([]byte(archivePrefix), []byte(uuid)...)
} else {
r.StartKey = []byte(archivePrefix)
}
r.EndKey = []byte(archiveEnd)
r.Count = num
kss, err = m.conn.GetRangeSlices(cp, pred, r, cassandra.ConsistencyLevel_ONE)
if err != nil {
return rv, err
}
for _, ks = range kss {
var member *MemberWithKey
var scol *cassandra.ColumnOrSuperColumn
var uuid cassandra.UUID = cassandra.UUIDFromBytes(
ks.Key[len(archivePrefix):])
if len(ks.Columns) == 0 {
continue
}
for _, scol = range ks.Columns {
var col *cassandra.Column = scol.Column
if string(col.Name) == "pb_data" {
var agreement = new(MembershipAgreement)
member = new(MemberWithKey)
err = proto.Unmarshal(col.Value, agreement)
proto.Merge(&member.Member, agreement.GetMemberData())
member.Key = uuid.String()
}
}
if member != nil {
rv = append(rv, member)
}
}
return rv, nil
}
// Retrieve an individual applicants data.
func (m *MembershipDB) GetMembershipRequest(id, table, prefix string) (*MembershipAgreement, int64, error) {
var uuid cassandra.UUID
var member *MembershipAgreement = new(MembershipAgreement)
var cp *cassandra.ColumnPath = cassandra.NewColumnPath()
var r *cassandra.ColumnOrSuperColumn
var err error
if uuid, err = cassandra.ParseUUID(id); err != nil {
return nil, 0, err
}
cp.ColumnFamily = table
cp.Column = []byte("pb_data")
// Retrieve the protobuf with all data from Cassandra.
r, err = m.conn.Get(
append([]byte(prefix), []byte(uuid)...),
cp, cassandra.ConsistencyLevel_ONE)
if err != nil {
return nil, 0, err
}
// Decode the protobuf which was written to the column.
err = proto.Unmarshal(r.Column.Value, member)
return member, *r.Column.Timestamp, err
}
// Move the record of the given applicant to a different column family.
func (m *MembershipDB) moveRecordToTable(
id, initiator, src_table, src_prefix, dst_table, dst_prefix string,
ttl int32) error {
var uuid cassandra.UUID
var bmods map[string]map[string][]*cassandra.Mutation
var now time.Time = time.Now()
var member *MembershipAgreement
var mutation *cassandra.Mutation = cassandra.NewMutation()
var value []byte
var timestamp int64
var err error
uuid, err = cassandra.ParseUUID(id)
if err != nil {
return err
}
// First, retrieve the desired membership data.
member, timestamp, err = m.GetMembershipRequest(id, src_table, src_prefix)
if err != nil {
return err
}
if dst_table == "membership_queue" && len(member.AgreementPdf) == 0 {
return errors.New("No membership agreement scan has been uploaded")
}
// Fill in details concerning the approval.
member.Metadata.ApproverUid = proto.String(initiator)
member.Metadata.ApprovalTimestamp = proto.Uint64(uint64(now.Unix()))
bmods = make(map[string]map[string][]*cassandra.Mutation)
bmods[dst_prefix+string(uuid)] = make(map[string][]*cassandra.Mutation)
bmods[dst_prefix+string(uuid)][dst_table] = make([]*cassandra.Mutation, 0)
bmods[src_prefix+string(uuid)] = make(map[string][]*cassandra.Mutation)
bmods[src_prefix+string(uuid)][src_table] = make([]*cassandra.Mutation, 0)
value, err = proto.Marshal(member)
if err != nil {
return err
}
// Add the application protobuf to the membership data.
bmods[dst_prefix+string(uuid)][dst_table] = append(
bmods[dst_prefix+string(uuid)][dst_table],
newCassandraMutationBytes("pb_data", value, &now, ttl))
// Delete the application data.
mutation.Deletion = cassandra.NewDeletion()
mutation.Deletion.Predicate = cassandra.NewSlicePredicate()
mutation.Deletion.Predicate.ColumnNames = allColumns
mutation.Deletion.Timestamp = ×tamp
bmods[src_prefix+string(uuid)][src_table] = append(
bmods[src_prefix+string(uuid)][src_table], mutation)
return m.conn.AtomicBatchMutate(bmods, cassandra.ConsistencyLevel_QUORUM)
}
func main() {
var uuid cassandra.UUID
var conn *cassandra.RetryCassandraClient
var r *cassandra.ColumnOrSuperColumn
var cp *cassandra.ColumnPath
var err error
var uuid_str, dbserver, dbname, columnfamily, column string
flag.StringVar(&uuid_str, "uuid-string", "",
"UUID string to look at")
flag.StringVar(&dbserver, "cassandra-server", "localhost:9160",
"Database server to look at")
flag.StringVar(&dbname, "dbname", "sfmembersys",
"Database name to look at")
flag.StringVar(&columnfamily, "column-family", "",
"Column family to look at")
flag.StringVar(&column, "column-name", "",
"Column name to look at")
flag.Parse()
uuid, err = cassandra.ParseUUID(uuid_str)
if err != nil {
log.Fatal(err)
}
conn, err = cassandra.NewRetryCassandraClient(dbserver)
if err != nil {
log.Fatal(err)
}
err = conn.SetKeyspace(dbname)
if err != nil {
log.Fatal(err)
}
cp = cassandra.NewColumnPath()
cp.ColumnFamily = columnfamily
cp.Column = []byte(column)
r, err = conn.Get([]byte(uuid), cp,
cassandra.ConsistencyLevel_ONE)
if err != nil {
log.Fatal(err)
}
log.Print(r.Column.Name, ": ", r.Column.Value, " (",
r.Column.Timestamp, ")")
}
// Add the membership agreement form scan to the given membership request
// record.
func (m *MembershipDB) StoreMembershipAgreement(id string, agreement_data []byte) error {
var agreement *MembershipAgreement
var bmods map[string]map[string][]*cassandra.Mutation
var now = time.Now()
var uuid cassandra.UUID
var buuid []byte
var value []byte
var err error
uuid, err = cassandra.ParseUUID(id)
if err != nil {
return err
}
buuid = append([]byte(applicationPrefix), []byte(uuid)...)
agreement, _, err = m.GetMembershipRequest(id, "application",
applicationPrefix)
if err != nil {
return err
}
agreement.AgreementPdf = agreement_data
bmods = make(map[string]map[string][]*cassandra.Mutation)
bmods[string(buuid)] = make(map[string][]*cassandra.Mutation)
bmods[string(buuid)]["application"] = make([]*cassandra.Mutation, 0)
value, err = proto.Marshal(agreement)
if err != nil {
return err
}
addMembershipRequestInfoBytes(bmods[string(buuid)],
"pb_data", value, &now)
addMembershipRequestInfoBytes(bmods[string(buuid)],
"application_pdf", agreement_data, &now)
return m.conn.AtomicBatchMutate(
bmods, cassandra.ConsistencyLevel_QUORUM)
}
// Get a list of all membership applications currently in the database.
// Returns a set of "num" entries beginning after "prev". If "criterion" is
// given, it will be compared against the name of the member.
func (m *MembershipDB) EnumerateMembershipRequests(criterion, prev string, num int32) (
[]*MemberWithKey, error) {
var cp *cassandra.ColumnParent = cassandra.NewColumnParent()
var pred *cassandra.SlicePredicate = cassandra.NewSlicePredicate()
var r *cassandra.KeyRange = cassandra.NewKeyRange()
var kss []*cassandra.KeySlice
var ks *cassandra.KeySlice
var rv []*MemberWithKey
var err error
// Fetch the name, street, city and fee columns of the application column family.
cp.ColumnFamily = "application"
pred.ColumnNames = [][]byte{
[]byte("name"), []byte("street"), []byte("city"), []byte("fee"),
[]byte("fee_yearly"),
}
if len(prev) > 0 {
var uuid cassandra.UUID
if uuid, err = cassandra.ParseUUID(prev); err != nil {
return rv, err
}
r.StartKey = append([]byte(applicationPrefix), []byte(uuid)...)
} else {
r.StartKey = []byte(applicationPrefix)
}
r.EndKey = []byte(applicationEnd)
r.Count = num
kss, err = m.conn.GetRangeSlices(
cp, pred, r, cassandra.ConsistencyLevel_ONE)
if err != nil {
return rv, err
}
for _, ks = range kss {
var member *MemberWithKey = new(MemberWithKey)
var scol *cassandra.ColumnOrSuperColumn
var uuid cassandra.UUID = cassandra.UUIDFromBytes(
ks.Key[len(applicationPrefix):])
member.Key = uuid.String()
if len(ks.Columns) == 0 {
continue
}
for _, scol = range ks.Columns {
var col *cassandra.Column = scol.Column
if string(col.Name) == "name" {
member.Name = proto.String(string(col.Value))
} else if string(col.Name) == "street" {
member.Street = proto.String(string(col.Value))
} else if string(col.Name) == "city" {
member.City = proto.String(string(col.Value))
} else if string(col.Name) == "fee" {
member.Fee = proto.Uint64(binary.BigEndian.Uint64(col.Value))
} else if string(col.Name) == "fee_yearly" {
member.FeeYearly = proto.Bool(col.Value[0] == 1)
}
}
rv = append(rv, member)
}
return rv, nil
}