use new packages

config/config.go

@@ -0,0 +1,20 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+)
+
+type AppConfig struct {
+	DataPath string
+}
+
+func Load() AppConfig {
+	// TODO: Handle os.MkdirAll error gracefully
+	homeDir, _ := os.UserHomeDir()
+	ketotrackDir := filepath.Join(homeDir, ".ketotrack")
+	os.MkdirAll(ketotrackDir, 0770) // handle error appropriately
+	return AppConfig{
+		DataPath: filepath.Join(ketotrackDir, "records.json"),
+	}
+}

data/records.go

@@ -0,0 +1,46 @@
+package data
+
+import (
+	"encoding/json"
+	"ketotrack/model"
+	"os"
+)
+
+// Record holds a pointer to a Reading or Note.
+type Record struct {
+	Reading *model.Reading `json:"reading,omitempty"`
+	Note    *model.Note    `json:"note,omitempty"`
+}
+
+// AppContext is the application data store that holds Records
+type AppContext struct {
+	Records []Record
+}
+
+// LoadRecords will load records from file
+func (ctx *AppContext) LoadRecords(filename string) error {
+	data, err := os.ReadFile(filename)
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(data, &ctx.Records)
+}
+
+// SaveRecords will save records to a file
+func (ctx *AppContext) SaveRecords(filename string) error {
+	jsonData, err := json.Marshal(ctx.Records)
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(filename, jsonData, 0660)
+}
+
+// AddReading will add a Reading to the AppContext
+func (ctx *AppContext) AddReading(reading model.Reading) {
+	ctx.Records = append(ctx.Records, Record{Reading: &reading})
+}
+
+// AddNote will a add a Note to the AppContext
+func (ctx *AppContext) AddNote(note model.Note) {
+	ctx.Records = append(ctx.Records, Record{Note: &note})
+}

main.go

@@ -2,14 +2,15 @@ package main
 
 import (
 	"bufio"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"os"
 	"path/filepath"
 	"strconv"
 	"strings"
-	"time"
+
+	"ketotrack/data"
+	"ketotrack/model"
 )
 
 var recordsFilename string
@@ -36,89 +37,8 @@ func init() {
 	recordsFilename = filepath.Join(ketotrackDir, "records.json")
 }
 
-// Record holds a pointer to a Reading or Note.
-type Record struct {
-	Reading *Reading `json:"reading,omitempty"`
-	Note    *Note    `json:"note,omitempty"`
-}
-
-// Note holds a text note along with the time the note was taken.
-type Note struct {
-	Time time.Time `json:"time"`
-	Text string    `json:"text"`
-}
-
-// NewNote returns a new Note
-func NewNote(text string) Note {
-	return Note{
-		Time: time.Now(),
-		Text: text,
-	}
-}
-
-// Reading holds the glucose and ketone level measurements along with the time the measurements were taken.
-type Reading struct {
-	Time    time.Time `json:"time"`
-	Glucose float64   `json:"glucose"`
-	Ketone  float64   `json:"ketone"`
-	GKI     float64   `json:"GKI"`
-}
-
-// NewReading creates and returns a new Reading instance with the provided glucose and ketone levels, and records
-// the current time. The glucose value should be provided in mg/dL, while the ketone level should be in mmol/L.
-func NewReading(glucose, ketone float64) Reading {
-	var gki float64
-	if ketone == 0 {
-		gki = 0
-	} else {
-		gki = (glucose / 18) / ketone
-	}
-
-	return Reading{
-		Time:    time.Now(),
-		Glucose: glucose,
-		Ketone:  ketone,
-		GKI:     gki,
-	}
-}
-
-// AppContext is the application data store that holds Records
-type AppContext struct {
-	Records []Record
-}
-
-// LoadRecords will load records from file
-func (ctx *AppContext) LoadRecords(filename string) error {
-	data, err := os.ReadFile(filename)
-	if err != nil {
-		return err
-	}
-	return json.Unmarshal(data, &ctx.Records)
-}
-
-// SaveRecords will save records to a file
-func (ctx *AppContext) SaveRecords(filename string) error {
-	jsonData, err := json.Marshal(ctx.Records)
-	if err != nil {
-		return err
-	}
-	return os.WriteFile(filename, jsonData, 0660)
-}
-
-// AddReading will add a Reading to the AppContext
-func (ctx *AppContext) AddReading(reading Reading) {
-	ctx.Records = append(ctx.Records, Record{Reading: &reading})
-}
-
-// AddNote will a add a Note to the AppContext
-func (ctx *AppContext) AddNote(note Note) {
-	ctx.Records = append(ctx.Records, Record{Note: &note})
-}
-
 func main() {
-	// TODO: Write option handlers (handleNewNote, handleNewReading)
-
-	var appCtx AppContext
+	var appCtx data.AppContext
 
 	if err := appCtx.LoadRecords(recordsFilename); err != nil {
 		fmt.Printf("Error loading records from file: %s\n", err)
@@ -164,39 +84,39 @@ func main() {
 	}
 }
 
-func getNote() (Note, error) {
+func getNote() (model.Note, error) {
 	text, err := getUserInput("Enter note text")
 	if err != nil {
-		return Note{}, err
+		return model.Note{}, err
 	}
-	return NewNote(text), nil
+	return model.NewNote(text), nil
 }
 
-func getReading() (Reading, error) {
+func getReading() (model.Reading, error) {
 	// Get glucose reading
 	glucose, err := getUserFloat("Enter glucose reading (mg/dL)")
 	if err != nil {
-		return Reading{}, fmt.Errorf("error getting glucose reading: %w", err)
+		return model.Reading{}, fmt.Errorf("error getting glucose reading: %w", err)
 	}
 
 	// Validate glucose reading
 	if glucose <= 0 {
-		return Reading{}, errors.New("glucose reading cannot be less than or equal to 0")
+		return model.Reading{}, errors.New("glucose reading cannot be less than or equal to 0")
 	}
 
 	// Get ketone reading
 	ketone, err := getUserFloat("Enter ketone reading (mmol/L)")
 	if err != nil {
-		return Reading{}, fmt.Errorf("error getting ketone reading: %w", err)
+		return model.Reading{}, fmt.Errorf("error getting ketone reading: %w", err)
 	}
 
 	// Validate ketone reading
 	if ketone < 0 {
 		fmt.Println("")
-		return Reading{}, errors.New("ketone reading cannot be less than 0")
+		return model.Reading{}, errors.New("ketone reading cannot be less than 0")
 	}
 
-	reading := NewReading(glucose, ketone)
+	reading := model.NewReading(glucose, ketone)
 
 	// Display GKI and level of ketosis
 	fmt.Printf("\nYour GKI is: %0.2f\n", reading.GKI)

model/types.go

@@ -0,0 +1,43 @@
+package model
+
+import "time"
+
+// Note holds a text note along with the time the note was taken.
+type Note struct {
+	Time time.Time `json:"time"`
+	Text string    `json:"text"`
+}
+
+// NewNote returns a new Note
+func NewNote(text string) Note {
+	return Note{
+		Time: time.Now(),
+		Text: text,
+	}
+}
+
+// Reading holds the glucose and ketone level measurements along with the time the measurements were taken.
+type Reading struct {
+	Time    time.Time `json:"time"`
+	Glucose float64   `json:"glucose"`
+	Ketone  float64   `json:"ketone"`
+	GKI     float64   `json:"GKI"`
+}
+
+// NewReading creates and returns a new Reading instance with the provided glucose and ketone levels, and records
+// the current time. The glucose value should be provided in mg/dL, while the ketone level should be in mmol/L.
+func NewReading(glucose, ketone float64) Reading {
+	var gki float64
+	if ketone == 0 {
+		gki = 0
+	} else {
+		gki = (glucose / 18) / ketone
+	}
+
+	return Reading{
+		Time:    time.Now(),
+		Glucose: glucose,
+		Ketone:  ketone,
+		GKI:     gki,
+	}
+}