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-rw-r--r--session.go265
1 files changed, 265 insertions, 0 deletions
diff --git a/session.go b/session.go
new file mode 100644
index 0000000..37a4b54
--- /dev/null
+++ b/session.go
@@ -0,0 +1,265 @@
+//
+// rhimportd
+//
+// The Radio Helsinki Rivendell Import Daemon
+//
+//
+// Copyright (C) 2015 Christian Pointner <equinox@helsinki.at>
+//
+// This file is part of rhimportd.
+//
+// rhimportd is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// rhimportd is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with rhimportd. If not, see <http://www.gnu.org/licenses/>.
+//
+
+package rhimport
+
+import (
+ "encoding/base32"
+ "fmt"
+ "github.com/satori/go.uuid"
+ "strings"
+)
+
+type Session struct {
+ ImportContext
+ ImportResult
+ // TODO: add creation time for timeout
+}
+
+type ProgressData struct {
+ step int
+ step_name string
+ progress float64
+ userdata interface{}
+}
+
+type newSessionResponse struct {
+ id string
+ err error
+}
+
+type newSessionRequest struct {
+ ctx ImportContext
+ response chan newSessionResponse
+}
+
+type sessionRunResponse struct {
+ err error
+}
+
+type sessionRunRequest struct {
+ user string
+ id string
+ response chan sessionRunResponse
+}
+
+type sessionAddProgressHandlerResponse struct {
+ err error
+}
+
+type sessionAddProgressHandlerRequest struct {
+ user string
+ id string
+ userdata interface{}
+ handler chan ProgressData
+ response chan sessionAddProgressHandlerResponse
+}
+
+type sessionAddDoneHandlerResponse struct {
+ err error
+}
+
+type sessionAddDoneHandlerRequest struct {
+ user string
+ id string
+ userdata interface{}
+ handler chan ImportResult
+ response chan sessionAddDoneHandlerResponse
+}
+
+type sessionRemoveResponse struct {
+ err error
+}
+
+type sessionRemoveRequest struct {
+ user string
+ id string
+ response chan sessionRemoveResponse
+}
+
+type SessionStore struct {
+ store map[string]map[string]Session
+ quit chan bool
+ done chan bool
+ newChan chan newSessionRequest
+ runChan chan sessionRunRequest
+ addProgressChan chan sessionAddProgressHandlerRequest
+ addDoneChan chan sessionAddDoneHandlerRequest
+ removeChan chan sessionRemoveRequest
+}
+
+func (self *SessionStore) Init() (err error) {
+ return
+}
+
+func (self *SessionStore) newSession(ctx ImportContext) (resp newSessionResponse) {
+ b := uuid.NewV4().Bytes()
+ resp.id = strings.ToLower(strings.TrimRight(base32.StdEncoding.EncodeToString(b), "="))
+ if _, exists := self.store[ctx.UserName]; !exists {
+ self.store[ctx.UserName] = make(map[string]Session)
+ }
+ self.store[ctx.UserName][resp.id] = Session{ImportContext: ctx}
+ rhdl.Printf("SessionStore: created session for '%s' -> %s", ctx.UserName, resp.id)
+ return
+}
+
+func (self *SessionStore) NewSession(ctx ImportContext) (string, error) {
+ req := newSessionRequest{}
+ req.ctx = ctx
+ req.response = make(chan newSessionResponse)
+ self.newChan <- req
+
+ res := <-req.response
+ if res.err != nil {
+ return "", res.err
+ }
+ return res.id, nil
+}
+
+func (self *SessionStore) run(user, id string) (resp sessionRunResponse) {
+ rhdl.Printf("SessionStore: running session '%s/%s'", user, id)
+ return
+}
+
+func (self *SessionStore) Run(user, id string) error {
+ req := sessionRunRequest{}
+ req.user = user
+ req.id = id
+ req.response = make(chan sessionRunResponse)
+ self.runChan <- req
+
+ res := <-req.response
+ return res.err
+}
+
+func (self *SessionStore) addProgressHandler(user, id string, userdata interface{}, handler chan ProgressData) (resp sessionAddProgressHandlerResponse) {
+ rhdl.Printf("SessionStore: adding progress handler to '%s/%s'", user, id)
+ return
+}
+
+func (self *SessionStore) AddProgressHandler(user, id string, userdata interface{}, handler chan ProgressData) error {
+ req := sessionAddProgressHandlerRequest{}
+ req.user = user
+ req.id = id
+ req.userdata = userdata
+ req.handler = handler
+ req.response = make(chan sessionAddProgressHandlerResponse)
+ self.addProgressChan <- req
+
+ res := <-req.response
+ return res.err
+}
+
+func (self *SessionStore) addDoneHandler(user, id string, userdata interface{}, handler chan ImportResult) (resp sessionAddDoneHandlerResponse) {
+ rhdl.Printf("SessionStore: adding done handler to '%s/%s'", user, id)
+ return
+}
+
+func (self *SessionStore) AddDoneHandler(user, id string, userdata interface{}, handler chan ImportResult) error {
+ req := sessionAddDoneHandlerRequest{}
+ req.user = user
+ req.id = id
+ req.userdata = userdata
+ req.handler = handler
+ req.response = make(chan sessionAddDoneHandlerResponse)
+ self.addDoneChan <- req
+
+ res := <-req.response
+ return res.err
+}
+
+func (self *SessionStore) remove(user, id string) (resp sessionRemoveResponse) {
+ if _, exists := self.store[user][id]; exists {
+ delete(self.store[user], id)
+ rhdl.Printf("SessionStore: removed session '%s/%s'", user, id)
+ if _, exists := self.store[user]; exists {
+ if len(self.store[user]) == 0 {
+ delete(self.store, user)
+ rhdl.Printf("SessionStore: removed user '%s'", user)
+ }
+ }
+ } else {
+ resp.err = fmt.Errorf("SessionStore: session '%s/%s' not found", user, id)
+ }
+ return
+}
+
+func (self *SessionStore) Remove(user, id string) error {
+ req := sessionRemoveRequest{}
+ req.user = user
+ req.id = id
+ req.response = make(chan sessionRemoveResponse)
+ self.removeChan <- req
+
+ res := <-req.response
+ return res.err
+}
+
+func (self *SessionStore) dispatchRequests() {
+ defer func() { self.done <- true }()
+ for {
+ select {
+ case <-self.quit:
+ return
+ case req := <-self.newChan:
+ req.response <- self.newSession(req.ctx)
+ case req := <-self.runChan:
+ req.response <- self.run(req.user, req.id)
+ case req := <-self.addProgressChan:
+ req.response <- self.addProgressHandler(req.user, req.id, req.userdata, req.handler)
+ case req := <-self.addDoneChan:
+ req.response <- self.addDoneHandler(req.user, req.id, req.userdata, req.handler)
+ case req := <-self.removeChan:
+ req.response <- self.remove(req.user, req.id)
+ }
+ }
+}
+
+func (self *SessionStore) Cleanup() {
+ self.quit <- true
+ <-self.done
+ close(self.quit)
+ close(self.done)
+ close(self.newChan)
+ close(self.runChan)
+ close(self.addProgressChan)
+ close(self.addDoneChan)
+ close(self.removeChan)
+}
+
+func NewSessionStore(conf *Config) (store *SessionStore, err error) {
+ store = new(SessionStore)
+
+ store.quit = make(chan bool)
+ store.done = make(chan bool)
+ store.store = make(map[string]map[string]Session)
+ store.newChan = make(chan newSessionRequest)
+ store.runChan = make(chan sessionRunRequest)
+ store.addProgressChan = make(chan sessionAddProgressHandlerRequest)
+ store.addDoneChan = make(chan sessionAddDoneHandlerRequest)
+ store.removeChan = make(chan sessionRemoveRequest)
+
+ go store.dispatchRequests()
+ return
+}