Add UseGalaxy Help Forum to Matrix channel Bot

.github/workflows/scrna-galaxyhelp-matrix.yml

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+name: "[Cron] Send Single-cell Galaxy Help Topics to Matrix CoP Room"
+
+on:
+  schedule:
+    # * is a special character in YAML so you have to quote this string
+    # We'll run this every monday at noon
+    - cron:  '0 12 * * 1'
+  workflow_dispatch:
+
+jobs:
+  runner-job:
+    if: github.repository_owner == 'galaxyproject'
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      # BEGIN Dependencies
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y coreutils curl libxml2-utils gawk sed grep jq wget
+      # END Dependencies
+
+      - name: Send announcements to single-cell matrix for unanswered posts
+        run: |
+            wget https://raw.githubusercontent.com/galaxyproject/training-material/main/bin/galaxy-help-news.sh
+            HTML_TYPE="bullets" MAX_REPLIES="0" WANTED_TAGS="scrna scrna-seq" ROOM_ID='!TJRLNvfcbWbSRoUNpl:matrix.org' bash ./galaxy-help-news.sh
+        env:
+            MATRIX_ACCESS_TOKEN: ${{ secrets.matrix_access_token }}

bin/galaxy-help-news.sh

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+#!/bin/bash
+
+MATRIX_SERVER=${MATRIX_SERVER:-"https://matrix.org"}
+ROOM_ID=${ROOM_ID:-'!TJRLNvfcbWbSRoUNpl:matrix.org'}  ## GTN Single Cell Maintainers
+WANTED_TAGS=${WANTED_TAGS:-"scrna scrna-seq"}
+MAX_REPLIES=${MAX_REPLIES:-1}
+HTML_TYPE=${HTML_TYPE:-"bullets"}  ## "table"
+
+## Result filters
+OPTS=${OPTS:-"?ascending=true&order=activity"}
+
+if [ -z "$MATRIX_ACCESS_TOKEN" ]; then
+    echo "
+This is a Matrix bot that scrapes Galaxy Help for certain tags and posts to
+a Room for topics that have less than X replies. Run this maybe once a month.
+
+Example Usage:
+
+   MATRIX_ACCESS_TOKEN='123_123_123' \\
+     MATRIX_SERVER='https://matrix.org' \\
+     ROOM_ID='!123_132_123:matrix.org' \\
+     WANTED_TAGS='tag1 tag2' \\
+     MAX_REPLIES=1 \\
+     HTML_TYPE='bullets' \\
+     bash $0
+
+Where:
+  MATRIX_ACCESS_TOKEN  Can be found in your Matrix profile under
+                       'All settings' -> 'Help & About' -> 'Access Token'
+
+  MATRIX_SERVER        The name or base address of the Matrix server to
+                       post to. Default is '$MATRIX_SERVER'
+
+  ROOM_ID              The Room ID can be found in the URL of the room
+                       usually following format '!123123123:matrix.org'.
+                       Default is '$ROOM_ID'
+                       NOTE: Single quotes are very important here.
+
+  WANTED_TAGS          A space separated list of valid tags to find posts
+                       at https://help.galaxyproject.org/
+                       Default is \"$WANTED_TAGS\"
+
+  MAX_REPLIES          Filter for posts that have less than or equal to
+                       this many replies. Default is \"$MAX_REPLIES\"
+
+  HTML_TYPE            Render either a 'table' or 'bullets'. HTML tables
+                       look great in the browser but don't render well on
+                       mobile. Default is \"$HTML_TYPE\"
+
+  OPTS                 Extra arguments to append to help.galaxyproject.org
+                       URL. Default is \"$OPTS\"
+   " >&2
+    exit 255
+fi
+
+function tag_to_tsv {
+    ## For a given TAG, fetch from the help forum, extract and parse
+    ## the table and produce a 4-column TSV output of Link, Title,
+    ## Replies, Views.
+    ##
+    ## TODO: Add date too?
+    local tag="$1"
+    curl -s "https://help.galaxyproject.org/tag/${tag}${OPTS}" \
+        | xmllint --noblanks --html --xpath '//tr[@class="topic-list-item"]/td/span' - 2>/dev/null \
+        | sed -r 's|<span class[^>]+>||; s|</span>||; s|\s*<a.*href=\"([^\"]*)\" [^>]+>([^<]+)<.*|_ROW_\1\t\2|' \
+        | tr '\n' '\t' \
+        | sed -r 's|\s\s\s*|\t|g; s|_ROW_|\n|g'
+}
+
+function alltags_to_tsv {
+    ## For all wanted tags, populate a 4-column TSV output of Link,
+    ## Title, Replies, Views, and return the path of the table.
+    local fetch_tags=$WANTED_TAGS
+    local tmp_tsv
+    tmp_tsv=$(mktemp --suffix=".tsv")
+    for tag in ${fetch_tags}; do
+        tag_to_tsv "$tag" >> "$tmp_tsv";
+    done
+    ## No duplicates, no blanks, no duplicate delimiters,
+    ## and sort by ascending reply count
+    grep -v "^\s*$" "${tmp_tsv}" | sed 's|\t\t|\t|g' \
+        | sort | uniq | sort -t $'\t' -nk 3 > "${tmp_tsv}".temp
+    echo -e "Link\tTitle\tReplies\tViews" > "${tmp_tsv}"
+    cat "${tmp_tsv}".temp  >> "${tmp_tsv}"
+    rm "${tmp_tsv}".temp
+    echo "${tmp_tsv}"
+}
+
+function filter_tsv {
+    ## Filter a TSV file for maximum replies and then return the path
+    ## of the new filtered table
+    local tsv="$1"
+    local tmp_tsv
+    tmp_tsv=$(mktemp --suffix=".tsv")
+    awk -F$'\t' -v replies="$MAX_REPLIES" '$3 <= replies' "${tsv}" > "${tmp_tsv}"
+    echo "${tmp_tsv}"
+}
+
+function tsv_to_html {
+    ## Convert a TSV table into HTML text that can be fed into a JSON
+    local tsv="$1"
+    if [ "$HTML_TYPE" = "table" ]; then
+        awk -F$'\t' -v subtitle="Recent posts matching: <b>${WANTED_TAGS}</b>, with replies &le; ${MAX_REPLIES}" '\
+BEGIN { print "<h1>Updates from Galaxy Help</h1>"subtitle"\n<table>\n<thead><tr><th>Topic</th><th>Replies</th><th>Views</th></tr></thead>\n<tbody>"} \
+END { print "</tbody>\n</table>"} \
+NR > 0 {print "<tr><td><a href=\""$1"\">"$2"</a></td><td>"$3"</td><td>"$4"</td></tr>"}' \
+            "${tsv}" | tr '\n' ' ' | sed 's|"|\\"|g'
+    else  ## bullets
+        awk -F$'\t' -v subtitle="Recent posts matching: <b>${WANTED_TAGS}</b>, with replies &le; ${MAX_REPLIES}" '\
+BEGIN { print "<h1>Updates from Galaxy Help</h1><br/><p>"subtitle"</p><ol>\n"} \
+END { print "\n</ol>"} \
+NR > 0 {print "<li><a href=\""$1"\">"$2"</a><ul><li>Replies: "$3" and Views: "$4"</li></ul></li>"}' \
+            "${tsv}" | tr '\n' ' ' | sed 's|"|\\"|g'
+    fi
+}
+
+function tsv_to_markdown {
+    ## Convert a TSV table into Markdown text that can be fed into a JSON
+    local tsv="$1"
+    awk -F$'\t' -v subtitle="Recent posts matching: **${WANTED_TAGS}**, with replies ≤ ${MAX_REPLIES}" '\
+BEGIN { print "## Updates from Galaxy Help\\n***"subtitle"***\\n"} \
+NR > 0 {print "* ["$2"]("$1")\\n   * "$3" replies and "$4" views\\n"}' \
+        "${tsv}" | tr '\n' ' ' | sed 's|"|\\"|g'
+}
+
+function md_and_html_to_json {
+    ## Stuff the Markdown and HTML text content into a JSON.
+    local md_text="$1"
+    local html_text="$2"
+    local tmp_json;
+    tmp_json=$(mktemp --suffix=".json")
+    ## See: https://spec.matrix.org/legacy/r0.0.0/client_server.html
+    ##      "put-matrix-client-r0-rooms-roomid-send-eventtype-txnid"
+    echo "{\
+\"msgtype\":\"m.notice\", \
+\"format\":\"org.matrix.custom.html\", \
+\"body\": \"${md_text}\", \
+\"formatted_body\": \"${html_text}\"}" > "${tmp_json}"
+    echo "${tmp_json}"
+}
+
+function post_json_to_matrix {
+    local json_file="$1"
+    local txnid post_url
+    txnid=$(date "+%Y%m%d%H%M${RANDOM:1:3}")   ## date-specific transaction ID
+    MATRIX_SERVER=${MATRIX_SERVER%/}           ## remove trailing slash, if any
+    ## Build curl
+    post_url="${MATRIX_SERVER}/_matrix/client/r0/rooms/"
+    post_url="${post_url}"${ROOM_ID}"/send/m.room.message/${txnid}"
+    post_url="${post_url}?access_token=${MATRIX_ACCESS_TOKEN}"
+    ## DEBUG:
+    ## - curl "$post_url" -X PUT --data '{"msgtype":"m.text","body":"hello"}'
+    curl "$post_url" -X PUT --data "$(cat ${json_file})"
+}
+
+function sanity_check {
+    ## Assert that required binaries are in PATH
+    local required_progs=( cat curl xmllint awk sed grep tr jq )
+    local miss=""
+    for prog in "${required_progs[@]}"; do
+        if ! which "${prog}" 2>/dev/null >&2; then
+            miss="$miss $prog"
+        fi
+    done
+    if [ "$miss" != "" ]; then
+        echo "Cannot run without:$miss"
+        exit 255
+    fi
+}
+
+## MAIN ##
+sanity_check
+
+main_tsv=$(filter_tsv "$(alltags_to_tsv)" )
+if [[ $(wc -l < "${main_tsv}") == 0 ]]; then
+    echo "Nothing new to post, aborting."  >&2
+    exit 0
+fi
+
+main_mdwn_text=$(tsv_to_markdown "${main_tsv}")
+main_html_text=$(tsv_to_html "${main_tsv}")
+
+main_json_file=$(md_and_html_to_json "${main_mdwn_text}" "${main_html_text}")
+if ! jq < "${main_json_file}" 2> /dev/null >&2; then
+    echo "This is not a valid JSON, aborting." >&2
+    echo "See: ${main_json_file}"  >&2
+    exit 255
+fi
+
+post_json_to_matrix "${main_json_file}"