Data commit

Task/Rosetta-Code-Find-unimplemented-tasks/Go/rosetta-code-find-unimplemented-tasks.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+    "encoding/xml"
+    "fmt"
+    "io"
+    "net/http"
+    "net/url"
+)
+
+const language = "Go"
+
+var baseQuery = "http://rosettacode.org/mw/api.php?action=query" +
+    "&format=xml&list=categorymembers&cmlimit=100"
+
+func req(u string, foundCm func(string)) string {
+    resp, err := http.Get(u)
+    if err != nil {
+        fmt.Println(err) // connection or request fail
+        return ""
+    }
+    defer resp.Body.Close()
+    for p := xml.NewDecoder(resp.Body); ; {
+        t, err := p.RawToken()
+        switch s, ok := t.(xml.StartElement); {
+        case err == io.EOF:
+            return ""
+        case err != nil:
+            fmt.Println(err)
+            return ""
+        case !ok:
+            continue
+        case s.Name.Local == "cm":
+            for _, a := range s.Attr {
+                if a.Name.Local == "title" {
+                    foundCm(a.Value)
+                }
+            }
+        case s.Name.Local == "categorymembers" && len(s.Attr) > 0 &&
+            s.Attr[0].Name.Local == "cmcontinue":
+            return url.QueryEscape(s.Attr[0].Value)
+        }
+    }
+    return ""
+}
+
+func main() {
+    // get language members, store in a map
+    langMap := make(map[string]bool)
+    storeLang := func(cm string) { langMap[cm] = true }
+    languageQuery := baseQuery + "&cmtitle=Category:" + language
+    continueAt := req(languageQuery, storeLang)
+    for continueAt > "" {
+        continueAt = req(languageQuery+"&cmcontinue="+continueAt, storeLang)
+    }
+
+    // a quick check to avoid long output
+    if len(langMap) == 0 {
+        fmt.Println("no tasks implemented for", language)
+        return
+    }
+
+    // get tasks, print as we go along
+    printUnImp := func(cm string) {
+        if !langMap[cm] {
+            fmt.Println(cm)
+        }
+    }
+    taskQuery := baseQuery + "&cmtitle=Category:Programming_Tasks"
+    continueAt = req(taskQuery, printUnImp)
+    for continueAt > "" {
+        continueAt = req(taskQuery+"&cmcontinue="+continueAt, printUnImp)
+    }
+}