Initial Commit

invoice.go

@@ -0,0 +1,75 @@
+// Package invoicetxt implements structs ad routines for working with invoice.txt files
+package invoicetxt
+
+import "strings"
+
+type Invoice struct {
+	ID             int               `json:"id"`       // Invoice id
+	Original       string            `json:"original"` // original raw invoice text
+	Hours          float64           `json:"hours"`
+	Rate           float64           `json:"rate"`
+	RetainerHours  float64           `json:"retainerHours,omitempty"`
+	RetainerRate   float64           `json:"retainerRate,omitempty"`
+	Contexts       []string          `json:"contexts"`
+	Projects       []string          `json:"projects"`
+	AdditionalTags map[string]string `json:"additionalTags"`
+}
+
+// ParseInvoice parses the input test string into an Invoice struct
+func ParseInvoice(text string) (*Invoice, error) {
+	var err error
+	invoice := Invoice{
+		AdditionalTags: make(map[string]string),
+	}
+	invoice.Original = strings.Trim(text, "\t\n\r")
+	parts := getParts(invoice.Original)
+	var pIdx int
+	for pIdx = range parts {
+		if partIsSpecial(parts[pIdx]) {
+			break
+		}
+	}
+
+	return &invoice, err
+}
+
+func partIsSpecial(pt string) bool {
+	if len(pt) == 0 {
+		return false
+	}
+	return pt[0] == '#' || pt[0] == '@'
+}
+
+// getParts parses the text from 'text' pu
+// Generally it just splits everything on spaces, except if we're in a double-quote
+func getParts(text string) []string {
+	var ret []string
+	var wrk string
+	quoteStart := -1
+	for i := range text {
+		if quoteStart >= 0 {
+			if text[i] == '"' {
+				quoteStart = -1
+				ret = append(ret, wrk)
+			} else {
+				wrk = wrk + string(text[i])
+			}
+		} else {
+			switch text[i] {
+			case '"':
+				quoteStart = i
+			case ' ':
+				if len(wrk) > 0 {
+					ret = append(ret, wrk)
+				}
+				wrk = ""
+			default:
+				wrk = wrk + string(text[i])
+			}
+		}
+	}
+	if len(wrk) > 0 {
+		ret = append(ret, wrk)
+	}
+	return ret
+}