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| 1 | +defmodule Algora.Analytics.Metrics do |
| 2 | + @moduledoc false |
| 3 | + |
| 4 | + import Ecto.Query |
| 5 | + |
| 6 | + alias Algora.Accounts.User |
| 7 | + alias Algora.Repo |
| 8 | + |
| 9 | + @type interval :: :daily | :weekly | :monthly |
| 10 | + @type period_metrics :: %{ |
| 11 | + org_signups: non_neg_integer(), |
| 12 | + org_returns: non_neg_integer(), |
| 13 | + dev_signups: non_neg_integer(), |
| 14 | + dev_returns: non_neg_integer() |
| 15 | + } |
| 16 | + |
| 17 | + @doc """ |
| 18 | + Returns user metrics for the last n periods with the given interval. |
| 19 | + Organizations are users who are members of an org where their handle differs from the org handle. |
| 20 | + Developers are all other users. |
| 21 | + """ |
| 22 | + @spec get_user_metrics(pos_integer(), interval()) :: [{DateTime.t(), period_metrics()}] |
| 23 | + def get_user_metrics(n_periods, interval) do |
| 24 | + period_start = period_start_date(n_periods, interval) |
| 25 | + interval_str = interval_to_string(interval) |
| 26 | + |
| 27 | + # Generate periods using SQL |
| 28 | + periods_query = |
| 29 | + from( |
| 30 | + p in fragment( |
| 31 | + """ |
| 32 | + SELECT generate_series( |
| 33 | + date_trunc(?, ?::timestamp), |
| 34 | + date_trunc(?, now()), |
| 35 | + (?||' '||?)::interval |
| 36 | + ) as period_start |
| 37 | + """, |
| 38 | + ^interval_str, |
| 39 | + ^period_start, |
| 40 | + ^interval_str, |
| 41 | + ^"1", |
| 42 | + ^interval_str |
| 43 | + ), |
| 44 | + select: %{period_start: fragment("period_start")} |
| 45 | + ) |
| 46 | + |
| 47 | + # Base query for all users with org membership info |
| 48 | + base_query = |
| 49 | + from u in User, |
| 50 | + where: not is_nil(u.handle), |
| 51 | + select: %{ |
| 52 | + inserted_at: fragment("date_trunc(?, ?)", ^interval_str, u.inserted_at), |
| 53 | + last_active_at: fragment("date_trunc(?, ?)", ^interval_str, u.last_active_at), |
| 54 | + is_org: |
| 55 | + fragment( |
| 56 | + """ |
| 57 | + EXISTS (SELECT 1 |
| 58 | + FROM members m |
| 59 | + INNER JOIN users o ON m.org_id = o.id |
| 60 | + WHERE m.user_id = ? AND o.id != m.user_id |
| 61 | + ) |
| 62 | + """, |
| 63 | + u.id |
| 64 | + ) |
| 65 | + } |
| 66 | + |
| 67 | + # Get signups per period |
| 68 | + signups = |
| 69 | + from q in subquery(base_query), |
| 70 | + right_join: p in subquery(periods_query), |
| 71 | + on: q.inserted_at == p.period_start, |
| 72 | + group_by: p.period_start, |
| 73 | + select: { |
| 74 | + p.period_start, |
| 75 | + %{ |
| 76 | + org_signups: coalesce(count(fragment("CASE WHEN ? IS TRUE THEN 1 END", q.is_org)), 0), |
| 77 | + dev_signups: coalesce(count(fragment("CASE WHEN ? IS NOT TRUE THEN 1 END", q.is_org)), 0) |
| 78 | + } |
| 79 | + } |
| 80 | + |
| 81 | + # Get returns per period |
| 82 | + returns = |
| 83 | + from q in subquery(base_query), |
| 84 | + right_join: p in subquery(periods_query), |
| 85 | + on: q.last_active_at == p.period_start, |
| 86 | + group_by: p.period_start, |
| 87 | + select: { |
| 88 | + p.period_start, |
| 89 | + %{ |
| 90 | + org_returns: coalesce(count(fragment("CASE WHEN ? IS TRUE THEN 1 END", q.is_org)), 0), |
| 91 | + dev_returns: coalesce(count(fragment("CASE WHEN ? IS NOT TRUE THEN 1 END", q.is_org)), 0) |
| 92 | + } |
| 93 | + } |
| 94 | + |
| 95 | + # Combine results |
| 96 | + signups = signups |> Repo.all() |> Map.new() |
| 97 | + returns = returns |> Repo.all() |> Map.new() |
| 98 | + |
| 99 | + # Merge metrics |
| 100 | + periods = Repo.all(periods_query) |
| 101 | + |
| 102 | + Enum.map(periods, fn %{period_start: date} -> |
| 103 | + signup_metrics = Map.get(signups, date, %{org_signups: 0, dev_signups: 0}) |
| 104 | + return_metrics = Map.get(returns, date, %{org_returns: 0, dev_returns: 0}) |
| 105 | + {date, Map.merge(signup_metrics, return_metrics)} |
| 106 | + end) |
| 107 | + end |
| 108 | + |
| 109 | + def period_start_date(n_periods, interval) do |
| 110 | + now = DateTime.utc_now() |
| 111 | + |
| 112 | + case interval do |
| 113 | + :daily -> DateTime.add(now, -n_periods, :day) |
| 114 | + :weekly -> DateTime.add(now, -n_periods * 7, :day) |
| 115 | + :monthly -> DateTime.add(now, -n_periods * 30, :day) |
| 116 | + end |
| 117 | + end |
| 118 | + |
| 119 | + def generate_periods(n_periods, interval) do |
| 120 | + now = DateTime.utc_now() |
| 121 | + interval_str = interval_to_string(interval) |
| 122 | + |
| 123 | + 0..(n_periods - 1) |
| 124 | + |> Enum.map(fn offset -> |
| 125 | + case interval do |
| 126 | + :daily -> DateTime.add(now, -offset, :day) |
| 127 | + :weekly -> DateTime.add(now, -offset * 7, :day) |
| 128 | + :monthly -> DateTime.add(now, -offset * 30, :day) |
| 129 | + end |
| 130 | + end) |
| 131 | + |> Enum.map(&DateTime.truncate(&1, :second)) |
| 132 | + # Truncate to the start of the period to match the SQL date_trunc |
| 133 | + |> Enum.map(fn dt -> |
| 134 | + dt |
| 135 | + |> DateTime.to_naive() |
| 136 | + |> NaiveDateTime.beginning_of_period(String.to_atom(interval_str)) |
| 137 | + |> DateTime.from_naive!("Etc/UTC") |
| 138 | + end) |
| 139 | + end |
| 140 | + |
| 141 | + defp interval_to_string(:daily), do: "day" |
| 142 | + defp interval_to_string(:weekly), do: "week" |
| 143 | + defp interval_to_string(:monthly), do: "month" |
| 144 | +end |
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