First working version (v1.0.0)

.gitignore

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+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+.env

LICENSE

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+BSD 2-Clause License
+
+Copyright (c) 2021, Shayan Ruhifard
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# sub2notion
+
+Subscribe to a public Notion page for changes and run a command on every detected change.
+
+## Use Case
+
+To publish my blog I'm using [loconotion](https://github.com/leoncvlt/loconotion).
+It turns Notion pages into static websites. Normally you would need to manually run the command every time you change something on that Notion page.
+
+But with sub2notion you can automatically call this command (or any other command) whenever the provided public page changes.
+
+Currently only the provided page id gets checked for changes, not the subpages. I wanted to keep it simple and it's enough for my use case because even on subpage changes you can just add a empty line at the end of the root page and it will change the modified time of that page (even if you undo the change) and therefore trigger the chosen command.
+
+## How To Use
+
+Set the following env variables
+
+- NOTION_PAGEID (the id of the public page you want to get notified about)
+- NOTION_CMD (the command to run)
+  - I set the full path to a bash script that starts a loconotion Docker container, creates a new git commit and pushes that commit
+- NOTION_CMD_ARGS (optional, arguments for the command)
+- NOTION_CMD_INTERVAL_SECONDS (How many seconds between the checks, defaults to 60)
+
+### Note
+
+Currently it does not work on Windows (except if you run inside WSL).
+
+## Building
+
+Clone this repository and then run `go build -o sub2notion -ldflags="-s -w" app.go`
+
+## Special Thanks
+
+- kjk for [notionapi](https://github.com/kjk/notionapi)
+- leoncvlt for [loconotion](https://github.com/leoncvlt/loconotion)

app.go

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+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"os/signal"
+	"strconv"
+	"syscall"
+	"time"
+
+	"github.com/kjk/notionapi"
+)
+
+const VERSION = "1.0.0"
+
+type App struct {
+	client *notionapi.Client
+}
+
+func main() {
+	app := &App{
+		client: &notionapi.Client{},
+	}
+
+	pageID := os.Getenv("NOTION_PAGEID")
+	if pageID == "" {
+		log.Fatalln("Notion page id was not specified, specify env var NOTION_PAGEID.")
+	}
+	if os.Getenv("NOTION_CMD") == "" {
+		log.Fatalln("No command set to run on changes, please set env var NOTION_CMD")
+	}
+
+	// First start, get the initial value
+	pageTitle, lastChange := app.getPageLastChange(pageID)
+	log.Printf("Starting sub2notion (v%s) | Title: %s, last change: %s", VERSION, pageTitle, lastChange.Format(time.RFC850))
+
+	doneC := make(chan bool)
+	signalC := make(chan os.Signal)
+	signal.Notify(signalC, syscall.SIGINT, syscall.SIGTERM)
+	go func() {
+		sig := <-signalC
+		log.Printf("Received %s signal, exiting sub2notion.", sig)
+		doneC <- true
+	}()
+
+	seconds, err := strconv.Atoi(os.Getenv("NOTION_CMD_INTERVAL_SECONDS"))
+	if err != nil {
+		seconds = 60
+		log.Printf("Checking for changes interval could not be retrieved: %s.\nYou can customize this by setting env var NOTION_CMD_INTERVAL_SECONDS\nSetting default value of %d seconds.\n", err, seconds)
+	}
+
+	go func() {
+		for {
+			time.Sleep(time.Duration(seconds) * time.Second)
+
+			title, t := app.getPageLastChange(pageID)
+			log.Printf("Current check | Title: %s, last change: %s\n", title, t.Format(time.RFC850))
+
+			if t.After(lastChange) {
+				pageTitle = title
+				lastChange = t
+				runCommand()
+			}
+		}
+	}()
+
+	<-doneC
+}
+
+func (app *App) getPageLastChange(pageID string) (string, time.Time) {
+	// We need to download the page every time because otherwise it would just be cached
+	page, err := app.client.DownloadPage(pageID)
+	if err != nil {
+		log.Fatalf("DownloadPage() method failed with %s\n", err)
+	}
+	return page.Root().Title, page.Root().LastEditedOn()
+}
+
+func runCommand() {
+	cmdToRun := os.Getenv("NOTION_CMD")
+	cmdArgs := os.Getenv("NOTION_CMD_ARGS")
+
+	fullCmdPath, err := exec.LookPath(cmdToRun)
+	if err != nil {
+		log.Fatalf("Could not get full path for command %s, error: %s\n", cmdToRun, err)
+	}
+
+	cmd := exec.Command("/bin/sh", "-c", fmt.Sprintf("%s %s", fullCmdPath, cmdArgs))
+	cmd.Env = os.Environ()
+
+	log.Printf("Command to run: %s", cmd.Args[0:])
+
+	bytes, err := cmd.CombinedOutput()
+	if err != nil {
+		log.Fatalf("Error calling command: %s\n", err)
+	}
+
+	log.Printf("Command returned:\n%s", string(bytes))
+}

go.mod

@@ -0,0 +1,5 @@
+module github.com/5hay/sub2notion
+
+go 1.16
+
+require github.com/kjk/notionapi v0.0.0-20210312181036-c1df7a1b08cd

go.sum

@@ -0,0 +1,52 @@
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