Add go dependencies

README.md

@@ -1,13 +1,17 @@
 # Kiwimix (calendar mixer)
 
-Swiss knife for calendars
+Swiss knife for ical & caldav calendars
 
 
 ## Roadmap
 
-Access to calendar (with credentials)
+Read a calendar
 
-  * :x: with hardcoded data :wink:
+
+Access to calendar
+
+* :x: access to public calendar
+* :x: access to private calendar (with credentials)
 * :x: with data from config file with multiple calendars
 
 Download calendar events locally
@@ -16,15 +20,16 @@ Download calendar events locally
 * :x: as separate files ?
 * :x: as an in-memory database ?
 
-Upload calendar events remotely
-
-  * :x: choose target calendar
-
 Merge events
 
 * :x: merge overlapping events
-  * :x: keep (internal) reference to source-calendars/parent-events
-  * :x: anonymize events
+* :x: keep reference to source-calendars/parent-events (meta-data? external?)
+* :x: make selected event (source calendar? pattern?) private or anonymous
+
+Upload calendar events remotely
+
+* :x: associate mixed local with remote target calendar
+* :x: handle event ids & duplicates
 
 Web I
 
@@ -33,3 +38,58 @@ Web I
 * :x: add a web frontend
 * :x: add user management & multi-account
 
+Serve calendar locally
+
+* :x: provide caldav urls for generated calendars
+
+## 
+
+Find free time
+
+    kiwimix generate \
+        --from-date XXX --to-date YYY \
+        --from-time 9:00 --to-time 19:00 \
+        | kiwimix substract - agenda.ics \
+
+Find free time for a meeting
+
+    kiwimix generate \
+        --from-date XXX --to-date YYY \
+        --from-time 9:00 --to-time 19:00 \
+        > full.ics
+    kiwimix union alice.ics bob.ics \
+        > events.ics
+    kiwimix substract full.ics events.ics \
+        > free.ics
+
+Rewrite events
+
+    kiwimix filter --merge alice.ics \
+      | kiwimix filter --anonymize - \
+
+
+V2 (with stack support)
+
+    kiwimix 
+      generate --....     # generate X calendar & push
+      @ read alice          # push alice.ics 
+      @ filter --merge      # pop alice, filter & push
+      @ filter --anonymize  # pop alice, filter & push
+      @ read bob            # push bob.ics 
+      @ filter --merge      # pop bob, filter & push
+      @ filter --anonymize  # pop bob, filter & push
+      @ union               # pop bob, pop alice, compute alice - bob
+      @ substract           # pop bob, pop alice, compute alice - bob
+
+
+    kiwimix filter --anonymize --merge alice.ics
+    kiwimix load bob.ics ! anonymize ! merge
+
+## References
+
+* https://github.com/PuloV/ics-golang => features missing but the code is OK
+* https://github.com/apognu/gocal => poorly coded
+* https://github.com/samedi/caldav-go
+* https://github.com/emersion/go-webdav
+
+

cmd/kiwimix/main.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+
+	ics "github.com/PuloV/ics-golang"
+	_ "github.com/mattn/go-sqlite3/driver"
+)
+
+func assertOk(e error) {
+	if e != nil {
+		panic(e)
+	}
+}
+
+func main() {
+	fmt.Println("Hello world")
+
+	icsBytes, err := ioutil.ReadFile("example.ics")
+	assertOk(err)
+
+	// start, end := time.Now(), time.Now().Add(12*30*24*time.Hour)
+	parser := ics.New()
+
+	parser.Load(string(icsBytes))
+	_, err = parser.GetErrors()
+	assertOk(err)
+
+	calendars, err := parser.GetCalendars()
+	assertOk(err)
+
+	events := calendars[0].GetEvents()
+	for _, e := range events {
+		fmt.Printf("%#v\n", e)
+		// fmt.Printf("%s on %s by %s\n", e.Summary, e.Start, e.Organizer.Cn)
+	}
+	// fmt.Print(string(f))
+}

go.mod

@@ -0,0 +1,9 @@
+module github.com/glenux/kiwimix
+
+go 1.16
+
+require (
+	github.com/PuloV/ics-golang v0.0.0-20190808201353-a3394d3bcade
+	github.com/apognu/gocal v0.8.0 // indirect
+	github.com/channelmeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61 // indirect; explicit
+)

go.sum

@@ -0,0 +1,15 @@
+github.com/ChannelMeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61 h1:N5Vqww5QISEHsWHOWDEx4PzdIay3Cg0Jp7zItq2ZAro=
+github.com/ChannelMeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61/go.mod h1:GnKXcK+7DYNy/8w2Ex//Uql4IgfaU82Cd5rWKb7ah00=
+github.com/PuloV/ics-golang v0.0.0-20190808201353-a3394d3bcade h1:odEkSCl2gLWPtvraEdCyBZbeYyMMTysWPLMurnB8sUY=
+github.com/PuloV/ics-golang v0.0.0-20190808201353-a3394d3bcade/go.mod h1:f1P3hjG+t54/IrnXMnnw+gRmFCDR/ryj9xSQ7MPMkQw=
+github.com/apognu/gocal v0.8.0 h1:uwbD4pdaxOw9hIjBNzFLTbdSraxB518Tmb8wGfNJrwE=
+github.com/apognu/gocal v0.8.0/go.mod h1:1UqOwBmHJ/oYF7NgorHPNx48sGfzrd748N+RJ7T+qok=
+github.com/channelmeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61 h1:o64h9XF42kVEUuhuer2ehqrlX8rZmvQSU0+Vpj1rF6Q=
+github.com/channelmeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61/go.mod h1:Rp8e0DCtEKwXFOC6JPJQVTz8tuGoGvw6Xfexggh/ed0=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/satori/go.uuid v1.2.0/go.mod h1:dA0hQrYB0VpLJoorglMZABFdXlWrHn1NEOzdhQKdks0=
+github.com/stretchr/testify v1.2.0 h1:LThGCOvhuJic9Gyd1VBCkhyUXmO8vKaBFvBsJ2k03rg=
+github.com/stretchr/testify v1.2.0/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=

pkg/kiwimix/version.go

@@ -0,0 +1 @@
+package kiwimix