From 8c801ea49ffd05e49f8c676566f69d68ea136d72 Mon Sep 17 00:00:00 2001
From: "Daniel J. Summers" <daniel.summers.2415@gmail.com>
Date: Thu, 18 Jan 2018 11:29:01 -0600
Subject: [PATCH] Interim commit; started work on routes

---
 .gitignore               |  3 +-
 src/api/data/data.go     | 37 ++++++++++++++++++++---
 src/api/routes/routes.go | 64 ++++++++++++++++++++++++++++++++++++++++
 src/my-prayer-journal.go | 13 ++++++--
 4 files changed, 109 insertions(+), 8 deletions(-)
 create mode 100644 src/api/routes/routes.go

diff --git a/.gitignore b/.gitignore
index 3814ec6..0ece221 100644
--- a/.gitignore
+++ b/.gitignore
@@ -256,4 +256,5 @@ paket-files/
 src/api/public/index.html
 src/api/public/static
 src/api/appsettings.json
-build/
\ No newline at end of file
+build/
+src/*.exe
\ No newline at end of file
diff --git a/src/api/data/data.go b/src/api/data/data.go
index bf03927..127e12a 100644
--- a/src/api/data/data.go
+++ b/src/api/data/data.go
@@ -7,6 +7,8 @@ import (
 	"log"
 	"time"
 
+	// Register the PostgreSQL driver.
+	_ "github.com/lib/pq"
 	"github.com/lucsky/cuid"
 )
 
@@ -21,6 +23,15 @@ const (
 		   AND "lastStatus" <> 'Answered'`
 )
 
+// Settings holds the PostgreSQL configuration for myPrayerJournal.
+type Settings struct {
+	Host     string `json:"host"`
+	Port     int    `json:"port"`
+	User     string `json:"user"`
+	Password string `json:"password"`
+	DbName   string `json:"dbname"`
+}
+
 /* Data Access */
 
 // Retrieve a basic request
@@ -74,7 +85,7 @@ func AddHistory(db *sql.DB, userID, reqID, status, text string) int {
 	}
 	_, err := db.Exec(`
         INSERT INTO mpj.history
-          	("requestId", "asOf", "status", "text")
+        	("requestId", "asOf", "status", "text")
         VALUES
 			($1, $2, $3, NULLIF($4, ''))`,
 		reqID, jsNow(), status, text)
@@ -123,9 +134,9 @@ func AddNote(db *sql.DB, userID, reqID, note string) int {
 		return 404
 	}
 	_, err := db.Exec(`
-        INSERT INTO mpj.note
-        	("requestId", "asOf", "notes")
-        VALUES
+		INSERT INTO mpj.note
+			("requestId", "asOf", "notes")
+		VALUES
 			($1, $2, $3)`,
 		reqID, jsNow(), note)
 	if err != nil {
@@ -166,6 +177,24 @@ func ByID(db *sql.DB, userID, reqID string) (*JournalRequest, bool) {
 	return &req, true
 }
 
+// Connect establishes a connection to the database.
+func Connect(s *Settings) (*sql.DB, bool) {
+	connStr := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=disable",
+		s.Host, s.Port, s.User, s.Password, s.DbName)
+	db, err := sql.Open("postgres", connStr)
+	if err != nil {
+		log.Print(err)
+		return nil, false
+	}
+	err = db.Ping()
+	if err != nil {
+		log.Print(err)
+		return nil, false
+	}
+	log.Printf("Connected to postgres://%s@%s:%d/%s\n", s.User, s.Host, s.Port, s.DbName)
+	return db, true
+}
+
 // FullByID retrieves a journal request, including its full history and notes.
 func FullByID(db *sql.DB, userID, reqID string) (*JournalRequest, bool) {
 	req, ok := ByID(db, userID, reqID)
diff --git a/src/api/routes/routes.go b/src/api/routes/routes.go
new file mode 100644
index 0000000..7a02cc1
--- /dev/null
+++ b/src/api/routes/routes.go
@@ -0,0 +1,64 @@
+// Package routes contains endpoint handlers for the myPrayerJournal API.
+package routes
+
+import (
+	"database/sql"
+	"encoding/json"
+	"log"
+	"net/http"
+
+	"github.com/danieljsummers/myPrayerJournal/src/api/data"
+	"github.com/julienschmidt/httprouter"
+)
+
+/* Support */
+
+// Set the content type, the HTTP error code, and return the error message.
+func sendError(w http.ResponseWriter, r *http.Request, err error) {
+	m := map[string]string{"error": err.Error()}
+	j, jErr := json.Marshal(m)
+	if jErr != nil {
+		log.Print("Error creating error JSON: " + jErr.Error())
+	}
+	w.WriteHeader(500)
+	w.Header().Set("Content-Type", "application/json")
+	w.Write(j)
+}
+
+// Set the content type and return the JSON to the user.
+func sendJSON(w http.ResponseWriter, r *http.Request, result interface{}) {
+	payload, err := json.Marshal(result)
+	if err != nil {
+		sendError(w, r, err)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	w.Write([]byte("{ data: "))
+	w.Write(payload)
+	w.Write([]byte(" }"))
+}
+
+/* Handlers */
+
+func journal(w http.ResponseWriter, r *http.Request, _ httprouter.Params, db *sql.DB) {
+	reqs := data.Journal(db, "TODO: get user ID")
+	if reqs == nil {
+		reqs = []data.JournalRequest{}
+	}
+	sendJSON(w, r, reqs)
+}
+
+/* Wrappers */
+
+func withDB(fn func(w http.ResponseWriter, r *http.Request, p httprouter.Params, db *sql.DB), db *sql.DB) httprouter.Handle {
+	return func(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
+		fn(w, r, p, db)
+	}
+}
+
+// Routes returns a configured router to handle all incoming requests.
+func Routes(db *sql.DB) *httprouter.Router {
+	router := httprouter.New()
+	router.GET("/journal", withDB(journal, db))
+	return router
+}
diff --git a/src/my-prayer-journal.go b/src/my-prayer-journal.go
index 8d2b152..4993504 100644
--- a/src/my-prayer-journal.go
+++ b/src/my-prayer-journal.go
@@ -2,10 +2,17 @@
 package main
 
 import (
-	"fmt"
-	"time"
+	"log"
+
+	"github.com/danieljsummers/myPrayerJournal/src/api/data"
+	"github.com/danieljsummers/myPrayerJournal/src/api/routes"
 )
 
 func main() {
-	fmt.Print(time.Now().UnixNano() / int64(1000000))
+	db, ok := data.Connect(&data.Settings{})
+	if !ok {
+		log.Fatal("Unable to connect to database; exiting")
+	}
+	router := routes.Routes(db)
+	_ = router // TODO: remove
 }