diff --git a/LICENSE b/LICENSE
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--- a/LICENSE
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- GNU GENERAL PUBLIC LICENSE
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-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
- END OF TERMS AND CONDITIONS
-
- How to Apply These Terms to Your New Programs
-
- If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
- To do so, attach the following notices to the program. It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-
- Copyright (C)
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see .
-
-Also add information on how to contact you by electronic and paper mail.
-
- If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
- Copyright (C)
- This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
- This is free software, and you are welcome to redistribute it
- under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License. Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
- You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-.
-
- The GNU General Public License does not permit incorporating your program
-into proprietary programs. If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library. If this is what you want to do, use the GNU Lesser General
-Public License instead of this License. But first, please read
-.
diff --git a/README.md b/README.md
index cb34583..1d85e85 100644
--- a/README.md
+++ b/README.md
@@ -6,23 +6,16 @@ Match patterns and solve anagrams - handy for crossword fanatics.
```bash
cd standalone
-go run main.go --listen :3000
+go run main.go
```
-## Copyright
+## Cloud Function
-Anagram and Word Search Server
-Copyright (C) 2024 Raymond Miller
+To test using the Cloud Functions Framework:
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+```bash
+env FUNCTION_TARGET=WordSearch WORDLIST_BUCKET=word-search-1729-assets \
+ WORDLIST_PATH=data/wordlist.txt LOCAL_ONLY=true go run ./cmd/fn-framework-test/main.go
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program. If not, see .
+curl 'http://localhost:8080?mode=anagrams&pattern=idea'
+```
diff --git a/anagram/anagram.go b/anagram/anagram.go
index 2563c6c..227165f 100644
--- a/anagram/anagram.go
+++ b/anagram/anagram.go
@@ -8,13 +8,18 @@ import (
"github.com/ray1729/wordsearch/util"
)
-type DB map[string][]string
-
-func New() DB {
- return make(DB)
+type DB interface {
+ FindAnagrams(s string) []string
+ Add(s string)
}
-func (db DB) Add(s string) {
+type HashDBImpl map[string][]string
+
+func New() HashDBImpl {
+ return make(HashDBImpl)
+}
+
+func (db HashDBImpl) Add(s string) {
k := toKey(s)
db[k] = append(db[k], s)
}
@@ -32,9 +37,12 @@ func Load(r io.Reader) (DB, error) {
db.Add(sc.Text())
}
- return db, sc.Err()
+ if err := sc.Err(); err != nil {
+ return nil, err
+ }
+ return db, nil
}
-func (d DB) FindAnagrams(s string) []string {
+func (d HashDBImpl) FindAnagrams(s string) []string {
return d[toKey(s)]
}
diff --git a/cloudfn.go b/cloudfn.go
new file mode 100644
index 0000000..489ebc5
--- /dev/null
+++ b/cloudfn.go
@@ -0,0 +1,147 @@
+package wordsearch
+
+import (
+ "bufio"
+ "context"
+ "fmt"
+ "log"
+ "net/http"
+ "os"
+ "sort"
+ "text/template"
+
+ "cloud.google.com/go/storage"
+ "github.com/GoogleCloudPlatform/functions-framework-go/functions"
+ "github.com/ray1729/wordsearch/anagram"
+ "github.com/ray1729/wordsearch/match"
+ "github.com/rs/cors"
+)
+
+var anagramDB anagram.DB
+var matchDB match.DB
+
+func initializeDB(ctx context.Context, bucketName, objectName string) error {
+ client, err := storage.NewClient(ctx)
+ if err != nil {
+ return fmt.Errorf("error creating storage client: %v", err)
+ }
+ r, err := client.Bucket(bucketName).Object(objectName).NewReader(ctx)
+ if err != nil {
+ return fmt.Errorf("error opening gs://%s/%s: %v", bucketName, objectName, err)
+ }
+ defer r.Close()
+ anagramDB = anagram.New()
+ matchDB = match.New()
+ sc := bufio.NewScanner(r)
+ for sc.Scan() {
+ s := sc.Text()
+ anagramDB.Add(s)
+ matchDB.Add(s)
+ }
+ if err := sc.Err(); err != nil {
+ return fmt.Errorf("error reading gs://%s/%s: %v", bucketName, objectName, err)
+ }
+ return nil
+}
+
+func init() {
+ ctx := context.Background()
+ bucketName := mustGetenv("WORDLIST_BUCKET")
+ objectName := mustGetenv("WORDLIST_PATH")
+ log.Println("Initializing databases")
+ if err := initializeDB(ctx, bucketName, objectName); err != nil {
+ panic(err)
+ }
+ corsHandler := cors.New(cors.Options{
+ AllowedOrigins: []string{"*"},
+ AllowedHeaders: []string{"*"},
+ AllowedMethods: []string{http.MethodPost},
+ AllowCredentials: false,
+ MaxAge: 3600,
+ })
+ log.Println("Registering HTTP function with the Functions Framework")
+ functions.HTTP("WordSearch", func(w http.ResponseWriter, r *http.Request) {
+ corsHandler.ServeHTTP(w, r, handleFormSubmission)
+ })
+}
+
+func mustGetenv(s string) string {
+ v := os.Getenv(s)
+ if len(v) == 0 {
+ panic(fmt.Sprintf("environment variable %s not set", s))
+ }
+ return v
+}
+
+func handleFormSubmission(w http.ResponseWriter, r *http.Request) {
+ if err := r.ParseForm(); err != nil {
+ log.Printf("error parsing form: %v", err)
+ http.Error(w, "error parsing form", http.StatusBadRequest)
+ return
+ }
+ mode := r.Form.Get("mode")
+ pattern := r.Form.Get("pattern")
+ if len(pattern) == 0 {
+ http.Error(w, "Missing pattern", http.StatusBadRequest)
+ return
+ }
+ switch mode {
+ case "match":
+ results := matchResults(matchDB, pattern)
+ renderTemplate(w, resultsTmpl, results)
+ case "anagrams":
+ results := anagramResults(anagramDB, pattern)
+ renderTemplate(w, resultsTmpl, results)
+ default:
+ log.Printf("invalid mode: %s", mode)
+ http.Error(w, fmt.Sprintf("Invalid mode: %s", mode), http.StatusBadRequest)
+ }
+}
+
+func anagramResults(db anagram.DB, pattern string) ResultParams {
+ var params ResultParams
+ params.Results = db.FindAnagrams(pattern)
+ if len(params.Results) > 0 {
+ params.Preamble = fmt.Sprintf("Anagrams of %q:", pattern)
+ } else {
+ params.Preamble = fmt.Sprintf("Found no anagrams of %q", pattern)
+ }
+ sort.Slice(params.Results, func(i, j int) bool { return params.Results[i] < params.Results[j] })
+ return params
+}
+
+func matchResults(db match.DB, pattern string) ResultParams {
+ var params ResultParams
+ params.Results = db.FindMatches(pattern)
+ if len(params.Results) > 0 {
+ params.Preamble = fmt.Sprintf("Matches for %q:", pattern)
+ } else {
+ params.Preamble = fmt.Sprintf("Found no matches for %q", pattern)
+ }
+ sort.Slice(params.Results, func(i, j int) bool { return params.Results[i] < params.Results[j] })
+ return params
+}
+
+func renderTemplate(w http.ResponseWriter, t *template.Template, params any) {
+ err := t.Execute(w, params)
+ if err != nil {
+ log.Printf("Error rendering template %s: %v", t.Name(), err)
+ http.Error(w, "Internal server error", http.StatusInternalServerError)
+ }
+}
+
+type ResultParams struct {
+ Preamble string
+ Results []string
+}
+
+var resultsTmpl = template.Must(template.New("results").Parse(`
+{{ with .Preamble }}
+