// Creates a collection with a specific uniq element, used for friend collections
func (this *MetaMgr) CreateSpecialCollection(owner *crypto.SecretIdentity, uniq *crypto.Digest) (cid string) {
pubkey := owner.Public()
cb := &collectionBasis{
Uniq: uniq,
Owner: pubkey,
}
cid = crypto.HashOf(cb.Owner.Fingerprint(), cb.Uniq).String()
existing := this.SyncMgr.Get(sync.RTBasis, cid, "$")
if existing != nil {
return cid
}
basis := &sync.Record{
RecordType: sync.RTBasis,
Topic: cid,
Key: "$",
Author: pubkey.Fingerprint().String(),
Value: transfer.AsBytes(cb),
}
signRecord(basis, owner)
this.SyncMgr.Put(basis)
owr := &sync.Record{
RecordType: sync.RTWriter,
Topic: cid,
Key: pubkey.Fingerprint().String(),
Value: transfer.AsBytes(pubkey),
}
signRecord(owr, owner)
this.SyncMgr.Put(owr)
return
}
// Writes meta-data, may fail if cid does not exist, or writer is not allowed
func (this *MetaMgr) Put(cid string, writer *crypto.SecretIdentity, key string, data []byte) error {
basisRec := this.SyncMgr.Get(sync.RTBasis, cid, "$")
if basisRec == nil {
return fmt.Errorf("Unable to write to cid '%s', doesn't exist!", cid)
}
myFingerprint := writer.Public().Fingerprint().String()
myPerm := this.SyncMgr.Get(sync.RTWriter, cid, myFingerprint)
if myPerm == nil {
return fmt.Errorf("Unable to write to cid '%s', '%s' doesn't have permission", cid, myFingerprint)
}
old := this.SyncMgr.Get(sync.RTData, cid, key)
priority := 0
if old != nil {
priority = old.Priority + 1
}
rec := &sync.Record{
RecordType: sync.RTData,
Topic: cid,
Key: key,
Value: data,
Priority: priority,
Author: myFingerprint,
}
signRecord(rec, writer)
if old != nil {
this.doCallbacks(cid, key, old.Value, myFingerprint, false)
}
this.SyncMgr.Put(rec)
this.doCallbacks(cid, key, data, myFingerprint, true)
return nil
}
