From f5d74f69a285c944eac13e78f15f4c4be6134a21 Mon Sep 17 00:00:00 2001
From: "Luke T. Shumaker" <lukeshu@lukeshu.com>
Date: Sat, 13 Apr 2024 16:44:58 -0600
Subject: wip dates

---
 gen.go         | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 plan.html.tmpl |  1 +
 2 files changed, 56 insertions(+)

diff --git a/gen.go b/gen.go
index dbddd3b..f82847e 100644
--- a/gen.go
+++ b/gen.go
@@ -3,12 +3,17 @@ package main
 import (
 	"bytes"
 	_ "embed"
+	"encoding/json"
 	"fmt"
+	"io"
+	"net/http"
 	"net/url"
 	"os"
 	"path"
+	"regexp"
 	"sigs.k8s.io/yaml"
 	"strings"
+	"time"
 
 	"github.com/yuin/goldmark"
 	"html/template"
@@ -31,6 +36,56 @@ type Contribution struct {
 	Desc        string   `json:"desc"`
 }
 
+var (
+	reGitHubPR      = regexp.MustCompile(`^https://github.com/([^/?#]+)/([^/?#]+)/pull/([0-9]+)(?:\?[^#]*)?(?:#.*)?$`)
+	rePiperMailDate = regexp.MustCompile(`^\s*<I>([^<]+)</I>\s*$`)
+)
+
+func (c Contribution) SubmittedAt() (time.Time, error) {
+	if m := reGitHubPR.FindStringSubmatch(c.URLs[0]); m != nil {
+		user := m[1]
+		repo := m[2]
+		prnum := m[3]
+		resp, err := http.Get("https://api.github.com/repos/" + user + "/" + repo + "/pulls/" + prnum)
+		if err != nil {
+			return time.Time{}, err
+		}
+		if resp.StatusCode != http.StatusOK {
+			return time.Time{}, fmt.Errorf("unexpected HTTP status: %v", resp.Status)
+		}
+		jsonBytes, err := io.ReadAll(resp.Body)
+		if err != nil {
+			return time.Time{}, err
+		}
+		var obj struct {
+			CreatedAt time.Time `json:"created_at"`
+		}
+		if err := json.Unmarshal(jsonBytes, &obj); err != nil {
+			return time.Time{}, err
+		}
+		return obj.CreatedAt, nil
+	}
+	if strings.Contains(c.URLs[0], "/pipermail/") {
+		resp, err := http.Get(c.URLs[0])
+		if err != nil {
+			return time.Time{}, err
+		}
+		if resp.StatusCode != http.StatusOK {
+			return time.Time{}, fmt.Errorf("unexpected HTTP status: %v", resp.Status)
+		}
+		htmlBytes, err := io.ReadAll(resp.Body)
+		if err != nil {
+			return time.Time{}, err
+		}
+		for _, line := range strings.Split(string(htmlBytes), "\n") {
+			if m := rePiperMailDate.FindStringSubmatch(line); m != nil {
+				return time.Parse(time.UnixDate, m[1])
+			}
+		}
+	}
+	return time.Time{}, nil //fmt.Errorf("idk how to check")
+}
+
 func ReadContribs(filename string) (Contribs, error) {
 	bs, err := os.ReadFile(filename)
 	if err != nil {
diff --git a/plan.html.tmpl b/plan.html.tmpl
index 70f7720..54d9431 100644
--- a/plan.html.tmpl
+++ b/plan.html.tmpl
@@ -125,6 +125,7 @@
 	  <a href="#tag-{{ $tag }}">#{{ $tag }}</a> {{/* */}}
 	  {{- end }}
 	</div>
+	<div class="contrib-submitted-at">{{ $contrib.SubmittedAt }}</div>
 	<div class="contrib-desc">{{ $contrib.Desc | md2html }}</div>
       </article>
       {{- end }}
-- 
cgit v1.2.3-54-g00ecf