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#lang racket
(provide nutrient-measurement
nutrient-measurement?
nutrient-measurement-id
(rename-out [nutrient-measurement-measured-on nutrient-measurement-date]
[nutrient-measurement-nutrient-values nutrient-measurement-values])
(contract-out
[create-nutrient-measurement!
(-> string? (listof nutrient-value-pair/c) nutrient-measurement?)]
[get-nutrient-measurements (-> (listof nutrient-measurement?))]
[get-nutrient-measurement
(->* ()
(#:id (or/c #f exact-nonnegative-integer?) #:measured-on (or/c #f string?))
(or/c nutrient-measurement? #f))]
[get-nutrient-measurement-values (-> nutrient-measurement? (listof nutrient-value-pair/c))]
[get-nutrient-measurement-value (-> nutrient-measurement? nutrient? number?)]
[get-latest-nutrient-measurement-value (-> nutrient? (or/c number? #f))]
[get-latest-nutrient-measurement-hash (-> (hash/c nutrient? number?))]
[delete-nutrient-measurement! (-> nutrient-measurement? void?)]))
(require racket/contract
db
sql
"../db/conn.rkt"
"nutrient.rkt")
(struct nutrient-measurement (id measured-on nutrient-values)
#:transparent
#:property prop:custom-write
(λ (v out _)
(fprintf out
"Measurement #~a on ~a\n"
(nutrient-measurement-id v)
(nutrient-measurement-measured-on v))
(for ([nv (nutrient-measurement-nutrient-values v)])
(match-define (cons n v) nv)
(fprintf out
"~a ~a\n"
(~a (nutrient-name n) #:min-width 14)
(~a v #:max-width 6 #:align 'right)))))
;; CREATE
(define (create-nutrient-measurement! measured-on nutrient-values)
(or
(get-nutrient-measurement #:measured-on measured-on)
(with-tx
(query-exec (current-conn) (insert #:into nutrient_measurements #:set [measured_on ,measured-on]))
(define nm-id
(query-value (current-conn)
(select id #:from nutrient_measurements #:where (= measured_on ,measured-on))))
(query-exec (current-conn)
(insert #:into nutrient_value_sets #:set [nutrient_measurement_id ,nm-id]))
(define nvs-id
(query-value (current-conn)
(select id #:from nutrient_value_sets #:where (= nutrient_measurement_id ,nm-id))))
(for ([nv nutrient-values])
(match-define (cons n v) nv)
(query-exec (current-conn)
(insert #:into nutrient_values
#:set [value_set_id ,nvs-id]
[nutrient_id ,(nutrient-id n)]
[value_ppm ,v])))
(get-nutrient-measurement #:measured-on measured-on))))
;; READ
(define joined
(table-expr-qq (inner-join (inner-join (inner-join (as nutrient_measurements nm)
(as nutrient_value_sets nvs)
#:on (= nvs.nutrient_measurement_id nm.id))
(as nutrient_values nv)
#:on (= nv.value_set_id nvs.id))
(as nutrients n)
#:on (= n.id nv.nutrient_id))))
(define (grouped-row->nutrient-measurement row)
(match-define (vector nm-id measured-on residuals) row)
(define nutrient-value-pairs (residuals->nutrient-value-pairs residuals))
(nutrient-measurement nm-id measured-on nutrient-value-pairs))
(define (get-nutrient-measurements)
(define grouped-rows (query-rows (current-conn)
(select nm.id
nm.measured_on
n.id
n.canonical_name
n.formula
nv.value_ppm
#:from (TableExpr:AST ,joined)
#:order-by nm.measured_on
#:desc)
#:group '#(0 1)))
(for/list ([row grouped-rows])
(grouped-row->nutrient-measurement row)))
(define (get-nutrient-measurement #:id [nm-id #f] #:measured-on [measured-on #f])
(define where
(cond
[(and nm-id measured-on)
(scalar-expr-qq (and (= nm.id ,nm-id) (= nm.measured_on ,measured-on)))]
[nm-id (scalar-expr-qq (= nm.id ,nm-id))]
[measured-on (scalar-expr-qq (= nm.measured_on ,measured-on))]
[else (error 'get-nutrient-measurement "either #:id or #:measured-on must be provided")]))
(define grouped-rows
(query-rows (current-conn)
(select nm.id
nm.measured_on
n.id
n.canonical_name
n.formula
nv.value_ppm
#:from (TableExpr:AST ,joined)
#:where (ScalarExpr:AST ,where)
#:order-by nm.measured_on
#:desc)
#:group '#(0 1)))
(match grouped-rows
['() #f]
[(list row) (grouped-row->nutrient-measurement row)]
[many (error 'get-nutrient-measurement "expected 1 nutrient measurement, got ~a" (length many))]))
(define (get-nutrient-measurement-values nutrient-measurement)
(for/list ([(nutrient-id name formula value_ppm)
(in-query (current-conn)
(select n.id
n.canonical_name
n.formula
nv.value_ppm
#:from (TableExpr:AST ,joined)
#:where (= nm.id ,(nutrient-measurement-id nutrient-measurement))))])
(cons (nutrient nutrient-id name formula) value_ppm)))
(define (get-nutrient-measurement-value nutrient-measurement nutrient)
(query-maybe-value (current-conn)
(select value_ppm
#:from (TableExpr:AST ,joined)
#:where (and (= nm.id ,(nutrient-measurement-id nutrient-measurement))
(= nv.nutrient_id ,(nutrient-id nutrient))))))
(define (get-latest-nutrient-measurement-value nutrient)
(query-maybe-value (current-conn)
(select value_ppm
#:from (TableExpr:AST ,joined)
#:where (= nv.nutrient_id ,(nutrient-id nutrient))
#:order-by nm.measured_on
#:desc
#:limit 1)))
;; UPDATE
;; DELETE
(define (delete-nutrient-measurement! nutrient-measurement)
(define id (nutrient-measurement-id nutrient-measurement))
(query-exec (current-conn) (delete #:from nutrient_measurements #:where (= id ,id))))
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