www: selectie van de week

.gitignore

@@ -33,6 +33,7 @@ Tzum/xml2txt
 VRT/metadata
 VRT/vrt
 bin/data2json
+bin/dates2json
 bin/ISOWeek
 bin/flush
 bin/items2count

Makefile

@@ -14,6 +14,7 @@ all:
 	make -C Tzum
 	make -C VRT
 	make bin/data2json
+	make bin/dates2json
 	make bin/flush
 	make bin/ISOWeek
 	make bin/items2count
@@ -24,6 +25,9 @@ all:
 bin/data2json: cmd/data2json/*.go
 	go build -o $@ $^
 
+bin/dates2json: cmd/dates2json/*.go
+	go build -o $@ $^
+
 bin/flush: cmd/flush/*.go
 	go build -o $@ $^
 

cmd/dates2json/dates2json.go

@@ -0,0 +1,105 @@
+package main
+
+import (
+	e "codeberg.org/pebbe/errors"
+
+	"encoding/json"
+	"fmt"
+	"os"
+	"slices"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type Date struct {
+	Week  string `json:"week"`
+	First string `json:"first"`
+	Last  string `json:"last"`
+}
+
+var (
+	x = e.ExitErr
+
+	dates = make([]Date, 0)
+)
+
+func main() {
+
+	files, err := os.ReadDir("/net/corpora/nlnieuws/data")
+	x(err)
+
+	for _, file := range files {
+		filename := file.Name()
+		if strings.HasPrefix(filename, "DATA-") && strings.HasSuffix(filename, "-4.json") {
+			addWeek(filename[5:12])
+		}
+	}
+
+	slices.Reverse(dates)
+	b, err := json.Marshal(dates)
+	x(err)
+	fmt.Println(string(b))
+
+}
+
+func addWeek(s string) {
+
+	week, err := strconv.Atoi(s[5:])
+	x(err)
+	year, err := strconv.Atoi(s[:4])
+	x(err)
+
+	// 15 januari van het jaar
+	t := time.Date(year, 1, 15, 12, 0, 0, 0, time.UTC)
+
+	// eerste gok
+	t = t.AddDate(0, 0, 7*week-14)
+
+	// zoek juiste week
+	var y, w int
+	for {
+		y, _ = t.ISOWeek()
+		if y < year {
+			t = t.AddDate(0, 12, 0)
+			continue
+		}
+		if y > year {
+			t = t.AddDate(0, -12, 0)
+			continue
+		}
+		break
+	}
+	for {
+		y, w = t.ISOWeek()
+		if w < week {
+			t = t.AddDate(0, 0, 7)
+			continue
+		}
+		if w > week {
+			t = t.AddDate(0, 0, -7)
+		}
+		break
+	}
+	if y != year {
+		x(fmt.Errorf("ongeldige combinatie van week/jaar: %d/%d", week, year))
+	}
+
+	// zoek begin van de week
+	d := int(t.Weekday())
+	if d == 0 {
+		d = 7
+	}
+	tFirst := t.AddDate(0, 0, 1-d)
+	tLast := tFirst.AddDate(0, 0, 6)
+
+	dates = append(dates, Date{
+		Week:  s,
+		First: makeDate(tFirst),
+		Last:  makeDate(tLast),
+	})
+}
+
+func makeDate(d time.Time) string {
+	return fmt.Sprintf("%d-%02d-%02d", d.Year(), int(d.Month()), d.Day())
+}

www/app.html

@@ -21,6 +21,7 @@
           <tr>
             <th>bron</th>
             <th>onderdeel</th>
+            <th>week</th>
           </tr>
           <tr>
             <td>
@@ -82,15 +83,15 @@
                 >&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</label
               >
             </td>
+            <td>
+              <input type="date" id="dDatum" name="dDatum" step="7" />
+            </td>
           </tr>
           <tr>
-            <td colspan="2" style="text-align: center">
+            <td colspan="3" style="text-align: center">
-              <p>to do: selecteer een periode</p>
+              <button type="button" onclick="kies()">
-              <p>
+                &mdash; laat maar zien &mdash;
-                <button type="button" onclick="kies()">
+              </button>
-                  &mdash; kies &mdash;
-                </button>
-              </p>
             </td>
           </tr>
         </table>

www/app.js

@@ -1,4 +1,5 @@
 var dates
+var datesNr
 
 var parts = [
   'nieuwe namen',
@@ -156,9 +157,9 @@ async function loadWeken(source, part) {
   tab.classList.add('outer')
   tr = document.createElement('tr')
 
-  for (var i = 0; i < 6; i++) {
+  for (var i = datesNr; i < datesNr + 10; i++) {
     if (i < dates.length) {
-      var week = dates[i]
+      var week = dates[i].week
       if (!data.has(week)) {
         data[week] = await getJSON('DATA-' + week + '-4.json')
       }
@@ -172,14 +173,51 @@ async function loadWeken(source, part) {
   document.getElementById('data').innerHTML = d.innerHTML
 }
 
+function locateWeek(date) {
+  if (date == '') {
+    datesNr = 0
+    return
+  }
+  var n = dates.length - 1
+  if (date < dates[n].first) {
+    datesNr = n
+    return
+  }
+  if (date > dates[0].last) {
+    datesNr = 0
+    return
+  }
+  var p1 = 0
+  var p2 = n
+  while (true) {
+    // fix voor als de weken niet aansluitend zijn (er ontbreken weken)
+    if (p1 > p2) {
+      datesNr = p2
+      return
+    }
+    var i = Math.floor((p1 + p2) / 2)
+    if (dates[i].first > date) {
+      p1 = i + 1 // dit klopt: lijst is van groot naar klein
+    } else if (dates[i].last < date) {
+      p2 = i - 1
+    } else {
+      datesNr = i
+      return
+    }
+  }
+}
+
 async function kies() {
   let source = document.forms['choice']['rSource'].value
   let part = document.forms['choice']['rPart'].value
+  let date = document.forms['choice']['dDatum'].value
   if ((source == 'alles' || source == '') && (part == 'alles' || part == '')) {
     alert('Kies een bron en/of een onderdeel')
     return
   }
 
+  locateWeek(date)
+
   const dd = document.getElementById('data')
   const st = document.getElementById('subtitle')
   dd.classList.add('fade')
@@ -187,11 +225,11 @@ async function kies() {
   await sleep(20)
 
   if (source == 'alles' || source == '') {
-    loadPart(part, dates[0])
+    await loadPart(part, dates[datesNr].week)
   } else if (part == 'alles' || part == '') {
-    loadSource(source, dates[0])
+    await loadSource(source, dates[datesNr].week)
   } else {
-    loadWeken(source, part)
+    await loadWeken(source, part)
   }
   dd.classList.remove('fade')
   st.classList.remove('fade')
@@ -199,7 +237,11 @@ async function kies() {
 
 async function init() {
   dates = await getJSON('index4.json')
-  loadSource('Algemeen', dates[0])
+  datesNr = 0
+  const d = document.getElementById('dDatum')
+  d.setAttribute('min', dates[dates.length - 1].last)
+  d.setAttribute('max', dates[0].last)
+  loadSource('Algemeen', dates[datesNr].week)
 }
 
 init()

www/index1.json

@@ -1 +1 @@
-["2026-16", "2026-15", "2026-14", "2026-13", "2026-12", "2026-11", "2026-10"]
+[{"week":"2026-16","first":"2026-04-13","last":"2026-04-19"},{"week":"2026-15","first":"2026-04-06","last":"2026-04-12"},{"week":"2026-14","first":"2026-03-30","last":"2026-04-05"},{"week":"2026-13","first":"2026-03-23","last":"2026-03-29"},{"week":"2026-12","first":"2026-03-16","last":"2026-03-22"},{"week":"2026-11","first":"2026-03-09","last":"2026-03-15"},{"week":"2026-10","first":"2026-03-02","last":"2026-03-08"}]

www/index4.json

@@ -1 +1 @@
-["2026-16", "2026-15", "2026-14", "2026-13", "2026-12", "2026-11", "2026-10"]
+[{"week":"2026-16","first":"2026-04-13","last":"2026-04-19"},{"week":"2026-15","first":"2026-04-06","last":"2026-04-12"},{"week":"2026-14","first":"2026-03-30","last":"2026-04-05"},{"week":"2026-13","first":"2026-03-23","last":"2026-03-29"},{"week":"2026-12","first":"2026-03-16","last":"2026-03-22"},{"week":"2026-11","first":"2026-03-09","last":"2026-03-15"},{"week":"2026-10","first":"2026-03-02","last":"2026-03-08"}]