Setup Query struct, add parameter builder function

search.go

@@ -0,0 +1,122 @@
+package main
+
+import (
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/samber/lo"
+)
+
+type Query struct {
+	Subject             *string
+	Title               *string
+	Keywords            *[]string
+	OpenOnly            *bool
+	TermPart            *[]string // e.g. [1, B6, 8, J]
+	Campus              *[]string // e.g. [9, 1DT, 1LR]
+	InstructionalMethod *[]string // e.g. [HB]
+	Attributes          *[]string // e.g. [060, 010]
+	Instructor          *[]uint64 // e.g. [27957, 27961]
+	StartTime           *time.Duration
+	EndTime             *time.Duration
+	CreditHours         *Range
+	CourseNumberRange   *Range
+}
+
+type Range struct {
+	Low  int
+	High int
+}
+
+// FormatTimeParameter formats a time.Duration into a tuple of strings
+// This is mostly a private helper to keep the parameter formatting for both the start and end time consistent together
+func FormatTimeParameter(d time.Duration) (string, string, string) {
+	hourParameter, minuteParameter, meridiemParameter := "", "", ""
+
+	hours := int64(d.Hours())
+	minutes := int64(d.Minutes()) % 60
+
+	minuteParameter = string(minutes)
+
+	if hours >= 12 {
+		hourParameter = "PM"
+
+		// Exceptional case: 12PM = 12, 1PM = 1, 2PM = 2
+		if hours >= 13 {
+			hourParameter = string(hours - 12) // 13 - 12 = 1, 14 - 12 = 2
+		} else {
+			hourParameter = string(hours)
+		}
+	} else {
+		meridiemParameter = "AM"
+		hourParameter = string(hours)
+	}
+
+	return hourParameter, minuteParameter, meridiemParameter
+}
+
+func (q *Query) Paramify() map[string]string {
+	params := map[string]string{}
+
+	if q.Subject != nil {
+		params["txt_subject"] = *q.Subject
+	}
+
+	if q.Title != nil {
+		// Whitespace can prevent valid queries from succeeding
+		params["txt_title"] = strings.TrimSpace(*q.Title)
+	}
+
+	if q.Keywords != nil {
+		params["txt_keyword"] = strings.Join(*q.Keywords, " ")
+	}
+
+	if q.OpenOnly != nil {
+		params["chk_open_only"] = "true"
+	}
+
+	if q.TermPart != nil {
+		params["txt_partOfTerm"] = strings.Join(*q.TermPart, ",")
+	}
+
+	if q.Campus != nil {
+		params["txt_campus"] = strings.Join(*q.Campus, ",")
+	}
+
+	if q.Attributes != nil {
+		params["txt_attribute"] = strings.Join(*q.Attributes, ",")
+	}
+
+	if q.Instructor != nil {
+		params["txt_instructor"] = strings.Join(lo.Map(*q.Instructor, func(i uint64, _ int) string {
+			return strconv.FormatUint(i, 10)
+		}), ",")
+	}
+
+	if q.StartTime != nil {
+		hour, minute, meridiem := FormatTimeParameter(*q.StartTime)
+		params["select_start_hour"] = hour
+		params["select_start_min"] = minute
+		params["select_start_ampm"] = meridiem
+	}
+
+	if q.EndTime != nil {
+		hour, minute, meridiem := FormatTimeParameter(*q.EndTime)
+		params["select_end_hour"] = hour
+		params["select_end_min"] = minute
+		params["select_end_ampm"] = meridiem
+	}
+
+	if q.CreditHours != nil {
+		params["txt_credithourlow"] = string(q.CreditHours.Low)
+		params["txt_credithourhigh"] = string(q.CreditHours.High)
+	}
+
+	if q.CourseNumberRange != nil {
+		params["txt_course_number_range"] = string(q.CourseNumberRange.Low)
+		params["txt_course_number_range_to"] = string(q.CourseNumberRange.High)
+	}
+
+	return params
+}