life-report/lifereport.go

111 lines
2.7 KiB
Go

// report parses life report JSON and
package report
import (
"encoding/json"
"fmt"
"html/template"
"os"
"path"
"strconv"
"strings"
)
type (
// Report represents a life report. It contains summaries and lists on
// various areas of a given person's life for the given time period --
// in this case, a month.
Report struct {
Num int
Month string
Year int `json:"year"`
Summary string `json:"summary"`
Sections []Section
}
// Section represents an area of life to report on. This contains a
// title to describe the area, a set of paragraphs representing a
// summary, and a set of details representing a list of more specific
// items.
Section struct {
Title string `json:"title"`
Summary []template.HTML `json:"summary"`
Details []template.HTML `json:"details"`
}
)
// ParseReport takes a file and generates a life report from it. It
// assumes the file is named in the format NNN-month.json where NNN is the
// number of the report, usually named with leading zeroes so they're
// ordered correctly on your filesystem.
func ParseReport(f *os.File) (*Report, error) {
var err error
r := Report{}
// Determine report number and month from filename in the format
// NNN-month.json
baseName := path.Base(f.Name())
fd := strings.Split(baseName[:strings.Index(baseName, ".json")], "-")
if len(fd) >= 2 {
r.Num, err = strconv.Atoi(fd[0])
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to parse report number: %v\n", err)
r.Num = 1
}
r.Month = strings.Title(fd[1])
} else {
r.Num = 1
r.Month = "First"
}
// Parse JSON into a map
var d map[string]interface{}
jsonParser := json.NewDecoder(f)
if err = jsonParser.Decode(&d); err != nil {
return nil, err
}
// Populate Report struct from the map
for k, v := range d {
// Handle consistent properties here, like year
if k == "year" {
r.Year = int(v.(float64))
continue
} else if k == "summary" {
r.Summary = v.(string)
continue
}
// All other properties will be the names of sections. The property name
// will be used as the default title for any given section, unless
// overridden by the object's actual `title` property.
s := Section{
Title: k,
}
m := v.(map[string]interface{})
if m["title"] != nil {
s.Title = m["title"].(string)
}
// Populate section summary
if m["summary"] != nil {
sums := m["summary"].([]interface{})
for _, sum := range sums {
s.Summary = append(s.Summary, template.HTML(sum.(string)))
}
}
// Populate section details
if m["details"] != nil {
dets := m["details"].([]interface{})
for _, det := range dets {
s.Details = append(s.Details, template.HTML(det.(string)))
}
}
r.Sections = append(r.Sections, s)
}
return &r, nil
}