try to autoformat the protobufs for the signal devs

1 files changed, 77 insertions, 3 deletions

diff --git a/protoReformat.go b/protoReformat.go
index e7b757b..1739288 100644
--- a/protoReformat.go
+++ b/protoReformat.go
@@ -5,6 +5,7 @@ package main
 
 import (
 	"fmt"
+	"iter"
 	"os"
 	"strings"
 
@@ -15,6 +16,7 @@ import (
 
 var maxVarname int
 var maxVartype int
+var linesIter iter.Seq[string]
 
 func protoReformat(filename string) error {
 	// read in the .proto file
@@ -27,9 +29,13 @@ func protoReformat(filename string) error {
 	var inMessage bool
 	var curmsg []string
 	var newfile string
+	var fmtmsg *FormatMsg
+	fmtmsg = new(FormatMsg)
+
+	linesIter = makeLineIter(data)
 
 	// gets the max vartype and varname
-	for _, line := range strings.Split(string(data), "\n") {
+	for line := range linesIter {
 		if strings.HasPrefix(line, "message ") {
 			inMessage = true
 			continue
@@ -39,7 +45,9 @@ func protoReformat(filename string) error {
 		if strings.HasPrefix(line, "}") {
 			inMessage = false
 			formatMessage(curmsg)
+			formatMessage2(fmtmsg)
 			curmsg = nil
+			fmtmsg = new(FormatMsg)
 			continue
 		}
 
@@ -48,11 +56,15 @@ func protoReformat(filename string) error {
 			continue
 		}
 		curmsg = append(curmsg, line)
+		fmtmsg.Lines = append(fmtmsg.Lines, line)
 	}
 
-	// parse the proto file for message struct names
-	for _, line := range strings.Split(string(data), "\n") {
+	// gets the max vartype and varname
+	for line := range linesIter {
 		if strings.HasPrefix(line, "message ") {
+			if inMessage {
+				// message inception. search for the architect. don't forget your totem
+			}
 			inMessage = true
 			parts := strings.Fields(line)
 			if len(parts) > 3 {
@@ -180,3 +192,65 @@ func slicesPop(parts []string) ([]string, string) {
 	end := parts[x-1]
 	return parts[0 : x-1], end
 }
+
+// 'for x := range' syntax using the awesome golang 1.24 'iter'
+func makeLineIter(data []byte) iter.Seq[string] {
+	items := strings.Split(string(data), "\n")
+	// log.Println("Made All() Iter.Seq[] with length", len(items))
+	return func(yield func(string) bool) {
+		for _, v := range items {
+			if !yield(v) {
+				return
+			}
+		}
+	}
+}
+
+func formatMessage2(curmsg *FormatMsg) []string {
+	var newmsg []string
+
+	// find the max length of varname and vartype
+	for _, line := range curmsg.Lines {
+		parts := strings.Split(line, ";")
+		if len(parts) < 2 {
+			// line is blank or just a comment
+			continue
+		}
+
+		vartype, varname, _, _ := tokenMsgVar(line)
+		if len(vartype) > maxVartype {
+			maxVartype = len(vartype)
+		}
+		if len(varname) > maxVarname {
+			maxVarname = len(varname)
+		}
+	}
+
+	for _, line := range curmsg.Lines {
+		line = strings.TrimSpace(line)
+		if line == "" {
+			newmsg = append(newmsg, line)
+			continue
+		}
+		if strings.HasPrefix(line, "//") {
+			pad := fmt.Sprintf("%d", maxVartype+maxVarname+21)
+			hmm := "%" + pad + "s %s"
+			line = fmt.Sprintf(hmm, " ", line) // todo: compute 50
+			newmsg = append(newmsg, line)
+			continue
+		}
+		mt := fmt.Sprintf("%d", maxVartype)
+		mv := fmt.Sprintf("%d", maxVarname)
+
+		hmm := "        %-" + mt + "s   %-" + mv + "s     = %-3s %s"
+
+		vartype, varname, id, end := tokenMsgVar(line)
+		end = strings.TrimSpace(end)
+		id = id + ";"
+
+		newline := fmt.Sprintf(hmm, vartype, varname, id, end)
+		newline = strings.TrimRight(newline, " ")
+		newmsg = append(newmsg, newline)
+	}
+	return newmsg
+}